Podcast appearances and mentions of paul laursen

Episode SummaryZone 2 gets talked about constantly in endurance training, but most everyday athletes don't have access to lactate testing or a metabolic lab. In this episode of The Athletes Compass Podcast, Paul Warloski and Dr. Paul Laursen explain practical ways to estimate Zone 2 using the talk test, breathing, perceived effort, heart rate, the MAF formula, power and pace. They discuss why athletes frequently drift into Zone 3, how threshold testing can improve accuracy, and when laboratory testing may—or may not—be worth the expense. The central message is simple: Zone 2 should feel like steady work, and combining multiple signals is often more useful than relying on a single number.Key TakeawaysZone 2 is aimed at developing aerobic capacity and maximizing the contribution of fat oxidation at a sustainable exercise intensity.The talk test is the simplest no-tech tool: you should still be able to speak in full sentences.A noticeable rise in breathing is associated with crossing the first ventilatory threshold, as carbohydrate contribution and ventilation increase.RPE matters. Paul Laursen describes Zone 2 as “steady work”—sustainable exercise that feels controlled rather than tempo-like.Athletes can triangulate talk test, breathing and perceived effort when they have no technology available.With a heart-rate monitor, 180 minus age—the MAF formula—can provide a starting point, but individual variation means it should not be treated as an exact threshold.A chest-strap heart-rate monitor is preferable when accuracy matters.Age-based formulas have limitations, especially for athletes whose maximum or threshold heart rates differ substantially from population averages.Threshold tests using heart rate, pace or power can help identify whether an athlete is an outlier and refine training zones.Athletes often accidentally turn easy sessions into Zone 3 training, particularly when trying to stay with faster training partners.One of the episode's recurring principles is that athletes may need to “slow down before you can speed up.”Lactate and metabolic testing can provide greater precision, but only if the equipment, protocol and interpretation are reliable.Emerging respiratory wearables may make breathing frequency and ventilation increasingly useful for identifying intensity zones in real time.How Athletica Closes the Cycle: From Athlete Profiling to Training PrescriptionZone 2 Training Benefits: The Science ExplainedZone 2 Training Plans (Ultimate Guide)TRY ATHLETICA.AI | Adaptive Endurance Training Plans Powered by Sports ScienceDr. Paul LaursenPaul Warloski - Simple Endurance Coaching

Does a short climb, town-line sprint, or brief surge above Zone 2 undo the benefits of an endurance workout? Paul Warloski and Dr. Paul Laursen explain why the answer is generally no. Brief excursions above LT1 or VT1 don't suddenly erase aerobic adaptations, and short bursts can even provide useful neuromuscular stimulus. The bigger issue is repeatedly turning easy training into moderate or hard training, accumulating fatigue and compromising the quality of the sessions that are supposed to be hard. The discussion covers the physiology behind Zone 2, fat and carbohydrate use, heart-rate recovery, polarized training, athlete phenotype, training age, recovery status, and why beginners, masters athletes, and experienced endurance athletes may need different approaches.Key TakeawaysA few seconds or minutes above Zone 2 won't ruin an endurance session. Short hills, accelerations, and occasional surges are generally nothing to worry about.The pattern matters more than an isolated effort. Problems arise when easy sessions repeatedly drift into Zone 3 and become moderately hard workouts.Zone 2 has a physiological basis. The discussion centers on the first ventilatory/lactate threshold, where breathing and carbohydrate use begin to rise noticeably.Going harder increases carbohydrate use and muscle-fiber recruitment. More ATP demand means greater reliance on glycolysis and increased recruitment of faster-twitch fibers.Aerobic adaptations don't switch off instantly above LT1. A brief excursion above the threshold doesn't erase the signaling or adaptations accumulated earlier in the workout.Heart rate can provide useful context. Because heart rate responds more slowly than pace or power, a very brief power surge may barely affect heart-rate zones.Recovery speed is itself a fitness signal. Better-conditioned athletes generally return to an aerobic state more rapidly following harder efforts.Short sprints can be useful. Ten-second efforts primarily challenge the neuromuscular and anaerobic alactic systems and may add a useful training stimulus without the metabolic cost of longer all-out efforts.The most important session is the next session. Training consistency matters more than squeezing extra intensity into every workout.Easy training helps make hard training harder. Keeping most sessions genuinely easy can preserve the ability to execute key interval workouts at higher quality.Beginners should generally protect Zone 2 more carefully. Athletes without a well-developed aerobic base may experience greater heart-rate drift and benefit from keeping easy sessions truly easy.Training age matters enormously. Years of consistent aerobic development influence how much intensity an athlete can absorb and how quickly they recover.Recovery status changes the answer. Poor sleep, suppressed HRV, high life stress, or accumulated fatigue are reasons to keep an endurance session strictly easy.Fuel according to the athlete and session. Athletes who struggle with low blood sugar or weakness during training may benefit from carbohydrate intake, particularly when harder efforts are unavoidable.TRY ATHLETICA.AI | Adaptive Endurance Training Plans Powered by Sports ScienceDr. Paul LaursenPaul Warloski - Simple Endurance Coaching

Should endurance athletes complete high-intensity intervals while fresh, or place them later in a workout after accumulating fatigue? Paul Warloski and Dr. Paul Laursen explain why the answer depends on the type of fatigue involved. General systemic or neuromuscular fatigue may be a reason to postpone intensity, while lower muscle-glycogen availability can amplify signals associated with mitochondrial development and fatigue resistance. The discussion covers AMPK, fat oxidation, fast-twitch muscle fibers, running mechanics, heat, race specificity, athlete type, training experience, and why experienced athletes may benefit from occasionally performing intervals later in a session—even when their power output is lower.Key takeawaysNot all fatigue is the same. Suppressed HRV, neuromuscular fatigue, and feeling systemically depleted are different from deliberately training with reduced glycogen availability.Do not force intensity when genuinely under-recovered. When the central nervous system appears flat or muscle tone and coordination are impaired, recovery or easy aerobic work may be more appropriate.Lower glycogen can increase the adaptive signal. The episode explains that training with reduced glycogen may amplify AMPK signaling, encouraging mitochondrial development.Lower power does not necessarily mean a poor session. Intervals performed later in a workout may produce less power while still creating a strong physiological stimulus.The aerobic system supports repeatable power. Training fast-twitch fibers under depleted conditions may help those fibers become more fatigue-resistant while retaining their strength.Running requires greater caution than cycling. Fatigue can alter stride length, ground-contact time, stiffness, and movement patterns, potentially increasing injury risk.Experienced athletes are better candidates for fatigue-state intervals. Beginners should generally complete a manageable warm-up and perform their intervals with good form and quality.Athlete profile matters. “Twitchy” athletes may require more recovery than diesel-type athletes, both between intervals and between demanding training days.Heat adds another stressor. High temperatures may increase glycogen use and reduce the ability to sustain interval quality, so heat-based sessions require careful control.Use fatigue-state intervals selectively. They are a tool for building durability, not a requirement for every high-intensity workout.TRY ATHLETICA.AI | Adaptive Endurance Training Plans Powered by Sports ScienceAthlete Profiling PrimerDr. Paul LaursenPaul Warloski - Simple Endurance Coaching

What if one of the most powerful performance tools isn't a supplement, a training method, or new technology, but belief itself?In this episode, S&C specialist Assoc Prof Vince Kelly explores the science behind the belief effect and how athlete expectations, coach communication, environment, and trust can meaningfully influence performance outcomes. From placebo and nocebo effects to coaching philosophy and practitioner credibility, this conversation unpacks why how an intervention is delivered can be just as important as the intervention itself.Whether you're a coach, sport scientist, clinician, or athlete, this episode offers practical insights into building stronger coach athlete relationships, improving communication, and creating environments that maximize performance.https://www.sciencedirect.com/science/article/pii/S0022399926003946Today's speakers:Prof Paul Laursen https://www.paullaursen.com/Assoc Prof Vince Kelly https://www.linkedin.com/in/vince-kelly-6452a621/Athletica Uhttps://youtube.com/playlist?list=PLu7L8NU083obOOZnkl9qd1lxr5zfVKTkL&si=YkGXTSQsJcYBUPiD

High-intensity interval training can produce rapid improvements, but repeatedly pushing to maximal effort may undermine recovery, consistency, and long-term progress. Paul Warloski and Dr. Paul Laursen discuss why HIIT must be supported by low-intensity aerobic training, how excessive intensity affects the nervous system, and why the appropriate dose depends on training history, age, conditioning, and individual recovery. They also explain how athletes can monitor heart-rate variability, sleep, perceived exertion, muscle tone, pace, and power to recognize when productive overload is becoming non-functional overreaching. The central message is simple: HIIT is powerful, but the smartest athletes use the minimum effective dose and preserve enough energy for the next session.Key takeawaysHIIT is potent, but it is not a complete training system. It can create strong short-term gains, especially in cardiovascular performance and fast-twitch muscle-fiber recruitment, but it needs an aerobic foundation.Zone 2 supports sustainable progress. Low-intensity training continues to provide an adaptive signal without imposing the same stress response as repeated high-intensity sessions.Too much HIIT can disrupt nervous-system balance. Frequent hard sessions may elevate sympathetic stress while reducing the recovery influence of the parasympathetic system.Recovery needs are individual. Training age, conditioning, age, muscular status, and previous exposure to intensity all affect how much HIIT an athlete can tolerate.Roughly 48 hours between hard sessions is a useful starting point. The episode presents this as a general guideline rather than a universal rule.One to two HIIT sessions may be enough for many everyday athletes. More experienced and highly conditioned athletes may tolerate three or more, but only after years of progressive preparation.Do not finish every HIIT workout completely exhausted. Paul Laursen recommends ending with the sense that one or two more repetitions were possible.The next workout matters more than destroying yourself today. Consistency is presented as the foundation of successful training.Monitor trends rather than isolated recovery readings. The discussion recommends comparing a seven-day HRV trend with a longer baseline rather than reacting to one unusual day.Muscle status can reveal fatigue that wearables miss. Heaviness, reduced stiffness or elasticity, soreness, and the loss of a fresh “pop” may indicate neuromuscular fatigue.Sub-threshold work may allow greater volume. Training just below the second threshold can provide a strong stimulus with less stress than repeated work above it.Use pace or power during HIIT. Heart rate responds too slowly during short intervals, so it is better reviewed after the session than used as the primary real-time target.Older athletes may require more recovery. The same session can produce a different load response depending on age and individual resilience.Athletes must remain in control of automated plans. Platforms, algorithms, and AI coaches are tools; sessions should still be adjusted when recovery or muscle status is poor.Smart work beats hard work. The episode challenges the “no pain, no gain” mindset and argues that restraint often produces better long-term results.TRY ATHLETICA.AI | Adaptive Endurance Training Plans Powered by Sports ScienceDr. Paul LaursenPaul Warloski - Simple Endurance Coaching

Supporting young female athletes requires more than great training programs. It starts with understanding the unique physiological, psychological, and developmental changes they experience throughout puberty.In this episode, Dr Julia Casadio shares her personal journey from aspiring Olympian to elite sport physiologist, and explains how those experiences inspired the creation of Her Strength. Together, we explore the challenges facing young female athletes, including body image, menstrual health, injury risk, nutrition, and the role coaches and parents play in creating positive sporting environments.The conversation also covers practical strategies for supporting female athletes through puberty, recognizing early warning signs of low energy availability, and helping more girls stay healthy, confident, and involved in sport for the long term.NEW COURSE with Dr Julia Casadio: Her Strength Coach Coursehttps://hiit-science.thinkific.com/courses/herstrength-coachcourseAthletica Uhttps://youtube.com/playlist?list=PLu7L8NU083obOOZnkl9qd1lxr5zfVKTkL&si=YkGXTSQsJcYBUPiD

Dr. Jose Antonio, co-founder and CEO of the International Society of Sports Nutrition, joins Paul Warloski and Paul Laursen to separate effective sports supplements from overhyped products. He explains why protein, creatine, beta-alanine, nitrates, and caffeine form his evidence-backed top five, while also making the case for sodium bicarbonate. The conversation covers practical dosing, protein requirements, creatine for endurance athletes and cognitive health, ineffective testosterone boosters, the placebo effect, probiotics, personalized supplementation, and race-day carbohydrate strategies. Throughout the episode, Antonio advocates a pragmatic approach: identify the athlete's goal, assess the potential benefit and harm, use the available science, and pay attention to what works in the real world.Key TakeawaysStart with the athlete's goal. A supplement recommendation is only meaningful when tied to a specific performance, recovery, health, or body-composition objective.Antonio's top five are protein, creatine, beta-alanine, nitrates, and caffeine. Sodium bicarbonate earns an additional place because of its buffering and performance benefits.Caffeine works, but dosage matters. Antonio discusses an effective range of roughly 1–6 mg per kilogram, with approximately 3 mg/kg as a common starting point.Creatine is not just for bodybuilders. It may support recovery and performance in cycling, swimming, paddling, and other sports where body weight is supported.Five grams of creatine per day is generally sufficient for skeletal muscle. Higher doses may be needed to influence cognition, although the evidence is still developing.Distance runners may prefer a lower creatine dose. Antonio suggests that around 2 g per day could provide recovery benefits while limiting unwanted weight gain.Protein should remain high even on rest days. Recovery continues when athletes are not training, so protein intake should not drop dramatically.One gram of protein per pound of body weight is presented as a practical athletic baseline. Higher intake may provide benefits, but affordability and adherence are real constraints.Beetroot-derived nitrates are preferred over arginine. Citrulline may help, but its effective dosing can be inconvenient.Testosterone boosters are among the most overhyped supplements. Tongkat ali and turkesterone have not demonstrated meaningful improvements in lean mass or sustained testosterone elevation in healthy athletes.Belief can affect performance. Antonio describes a caffeine experiment in which participants performed according to the dose they thought they received—even though every dose was a placebo.Practice fueling strategies in training. Whether an athlete uses 30, 60, or 120 grams of carbohydrate per hour, race day should never be the first experiment.Dr. Jose AntonioPaul Warloski - Simple Endurance CoachingMarjaana Rakai | Nordic Performance Lab

Why can a hard workout feel manageable at first, only to leave you struggling with stairs two days later? In this episode of The Athletes Compass Podcast, Paul Warloski and Dr. Paul Laursen explain delayed onset muscle soreness, or DOMS, and the role eccentric muscle contractions play in creating microscopic muscle damage. They explore why downhill running is especially punishing, how the repeated bout effect makes athletes more resilient, and why sport-specific preparation matters even for highly trained athletes. The conversation also covers protein timing, sleep, BCAAs, caffeine, hydration, warm-ups, and practical ways to decide whether soreness is mild enough to train through—or a sign that recovery should take priority.Key TakeawaysDOMS usually peaks around 24–72 hours after unfamiliar or demanding exercise.Eccentric contractions—when a muscle lengthens while producing force—are a major trigger for soreness.Downhill running creates particularly high eccentric loading and should be introduced progressively.Soreness is not required for an effective workout and should not be treated as the goal.The repeated bout effect means the body experiences less damage and soreness after repeated exposure to the same movement.Athletes should prepare for the specific mechanical demands of their event, not just its cardiovascular demands.Gentle movement may help mild soreness feel better, but severe soreness requires patience and reduced loading.Total daily protein intake is likely more important than hitting a narrow post-workout “anabolic window.”Sleep supports the repair and adaptation processes that occur after training.Caffeine may reduce the perception of discomfort, but masking soreness can make it easier to overreach.A practical warm-up test can help guide training: if mild soreness improves as you move, the session may be manageable; if it persists or worsens, backing off is prudent.The most important workout is often the next workout, so today's session should not create more damage than the training plan can absorb.Dr. Paul LaursenPaul Warloski - Simple Endurance Coaching

Training isn't just about replicating race demands. It's about understanding the physiology that drives performance.In this episode, Dr Gabriele Gallo, founder of Knowledge is Watts, joins us to explore the concept of a physiology first approach to endurance training. Together, we discuss why successful coaching goes beyond chasing power numbers, how low and high intensity training work together over different timeframes, and why durability may be one of the most important frontiers in endurance performance.The conversation also explores fatigue resistance, carbohydrate availability, muscle damage, central fatigue, and how emerging technologies and AI may help coaches better understand the complex relationship between physiology and performance.Whether you're a coach, athlete, or sports scientist, this episode offers practical insights into building long term endurance through smarter training principles rather than simply copying race demands.Interested in learning more about the latest developments in endurance performance and sports science? Subscribe to the HIIT Science email list for updates on new research, courses, and educational opportunities.https://www.knowledgeiswatt.com/https://knowledgeiswatt.substack.com/Today's speakers:Prof Paul Laursen https://www.paullaursen.com/Gabriele Gallo https://x.com/knowledgeiswattAthletica Uhttps://youtube.com/playlist?list=PLu7L8NU083obOOZnkl9qd1lxr5zfVKTkL&si=YkGXTSQsJcYBUPiD

For decades, lactate was viewed as a waste product associated with fatigue and declining performance. Today, a growing body of research paints a very different picture.In this episode, sports scientist and researcher Aitor Viribay Morales explores the evolving science of lactate, from its role as a critical fuel source to its emerging importance as a signaling molecule that influences performance, recovery, and adaptation.The conversation dives into the lactate shuttle theory, the relationship between lactate and endurance performance, the interaction between lactate and the nervous system, and the growing interest in exogenous lactate as a potential tool for athletes. Aitor also shares insights from his work in exercise metabolism and sports nutrition, highlighting how our understanding of lactate continues to evolve beyond traditional models of fatigue.Whether you're a coach, athlete, researcher, or endurance enthusiast, this episode offers a fascinating look at one of the most misunderstood molecules in sports science.Interested in learning more about the latest developments in endurance performance and sports science? Subscribe to the HIIT Science email list for updates on new research, courses, and educational opportunities.Today's speakers:Prof Paul Laursen https://www.paullaursen.com/Dr Aitor Viribay Morales: https://www.linkedin.com/in/aitor-viribay-598336155https://glut4science.com/

In this episode of The Athletes Compass, Paul Warloski, Dr. Paul Laursen, and Marjaana Rakai explain Athletica's Workout Reserve and the new Systems Engagement feature. Workout Reserve is described as a battery-like metric that shows how close an athlete is to their historical best across different durations, from short sprint efforts to long aerobic performances. The team discusses how athletes can use it in real time through Velocity or Garmin, how negative values can signal breakthrough efforts, and why good historical data is essential. They also explain how Systems Engagement helps athletes and coaches see which physiological systems were stressed in a workout or race, making it easier to reverse engineer training toward the actual demands of an event.Key episode takeawaysWorkout Reserve acts like a “battery” showing how much capacity an athlete has left relative to their recent historical bests.A value near 100% suggests the athlete is fresh relative to that effort, while 0% means they are approaching a known personal limit. Negative values indicate new, uncharted territory.Workout Reserve can be viewed retrospectively in Athletica, live in Velocity sessions, or through the Garmin Workout Reserve data field.Systems Engagement shows which energy systems were stressed during a workout or selected segment, such as neuromuscular sprint, anaerobic, VO2 max, threshold, or aerobic systems.A 30/30 interval session may engage both VO2 max and threshold systems, which matches the expected training adaptations.The tool is most useful when athletes have enough valid historical data, including power or pace tests such as FTP tests, 5K tests, or sport-specific calibration sessions.Workout Reserve and Systems Engagement are based on external load, such as pace or power, not internal load measures like heart rate, lactate, or RPE.Coaches can use Systems Engagement to check whether an athlete actually trained the intended system.Race analysis can help athletes identify which physiological systems were most taxed, then design training to target those demands.Not every session should push Workout Reserve to zero or negative; easy aerobic sessions still have a purpose.How a ProTour cycling coach uses Athletica Workout ReserveWorkout Reserve: A New Way to Understand Performance with Dr. Andrea ZignoliScientific Paper in Sports EngineeringRace Analysis - Volta ValencianaGarmin Connect IQ | HomeTrain and Race with WR on GarminAthletica Workout Reserve | HomePaul Warloski - Simple Endurance CoachingMarjaana Rakai | Nordic Performance Lab

What happens when you study people who have spent decades consistently running marathons?In this episode, we sit down with researcher and multi marathoner Leo Lundy to explore what endurance athletes can teach us about healthy aging, longevity, and lifelong performance.Drawing from his PhD research on multi marathoners around the world, Leo shares insights into cardiovascular fitness, VO₂ max, all cause mortality, cognitive performance, mental health, and the long term effects of sustained endurance training.The conversation examines why regular physical activity may help slow age-related decline, how motivation evolves across the lifespan, and what separates successful aging from simply getting older. Leo also discusses important vulnerabilities within endurance communities, including injury risk, painkiller use, mental health challenges, and the importance of ongoing health screening.Whether you're an athlete, coach, practitioner, or simply interested in extending your healthspan, this episode offers a fascinating look at what decades of consistent movement can teach us about living and aging well. Interested in learning more from leading experts in endurance performance and healthy aging? Join the HIIT Science email list for the latest research, podcast episodes, and educational opportunities.Today's speakers:Prof Paul Laursen https://www.paullaursen.com/Leo Lundy: https://www.linkedin.com/in/leo-lundy-5509501a2/https://multimarathon.research.st/

In this episode of The Athletes Compass, Dr. William B. Irvine joins Paul Warloski, Paul Laursen, and Marjaana Rakai to explore how Stoic philosophy can help endurance athletes train, race, and live with more resilience. Irvine connects rowing, coaching, discomfort, failure, and competition to practical Stoic ideas such as focusing on what you can control, reframing setbacks, practicing negative visualization, and valuing process over outcomes. The conversation moves from “keep your head in the boat” to “one more stroke,” offering athletes a grounded mental toolkit for handling race-day adversity, physical discomfort, self-doubt, and the temptation to tie self-worth to results.Key Takeaways“Keep your head in the boat” is a powerful Stoic metaphor: focus on what you can control, not the weather, competitors, or external conditions.Irvine's practical Stoic advice: “Do what you can with what you've got where you are.”Athletes can reframe setbacks as “Stoic tests” rather than disasters.Discomfort and pain are not the same; endurance athletes learn to tolerate discomfort as part of growth.“One more stroke” is a simple mental strategy for surviving hard moments in training, racing, illness, or life.Failure is valuable when it comes from attempting something difficult and learning from the result.Competitive athletes can stay healthier mentally by focusing on process goals rather than outcome goals.Negative visualization helps athletes appreciate what they already have and prepare for what could go wrong.Last-time meditation can deepen gratitude: every race, ride, row, or run may someday be the last.Stoicism is not about suppressing emotion; it is about maintaining equanimity when life or sport gets hard.More Better Thinking | Dr. William B. IrvineJoin the Athletica 5K Virtual RaceDr. Paul LaursenPaul Warloski - Simple Endurance CoachingMarjaana Rakai | Nordic Performance Lab

What should endurance athletes actually eat before training? Does fasted training improve adaptation? And why do some athletes thrive on high carbohydrate intake while others perform better with less?In this episode, Dr Jeff Rothschild joins the podcast to unpack the complexity behind endurance nutrition, recovery, and training adaptation. Drawing from his work as a sports dietitian, researcher, and performance analyst, Jeff shares insights from years of research exploring carbohydrate practices, fasted training, substrate utilization, and individual variability in athlete response.The conversation explores why high intensity sessions may not require fasted training to stimulate adaptation, how recovery responses differ dramatically between athletes, and why generalized nutrition guidelines often fail to capture individual needs.Jeff also discusses the growing role of data science, machine learning, and longitudinal athlete monitoring in understanding recovery and fueling strategies, along with the practical realities of applying nutrition science in elite sport.This episode offers a balanced and highly practical discussion on endurance nutrition, helping athletes and coaches better understand how to fuel training without getting lost in dogma or extremes.Today's speakers:Prof Paul Laursen https://www.paullaursen.com/Dr Jeff Rothschild https://www.linkedin.com/in/jeff-rothschild-phd-016170146/https://www.eatsleep.fit/

In this episode of The Athletes Compass Podcast, Paul Warloski, Dr. Paul Laursen, and Marjaana Rakai break down the concept of power and pace profiles — the personalized performance fingerprints hidden inside your training data. They explain how these profiles reveal an athlete's strengths, weaknesses, critical power, and sustainable race pace without expensive lab testing. The conversation explores how Athletica uses real-world wearable data and AI coaching to prescribe training zones, assess race readiness, and predict event performance. From marathon pacing to hill-specific preparation and anaerobic profiling, the episode offers practical guidance for endurance athletes looking to train smarter and race more effectively.Key TakeawaysA power or pace profile maps your best efforts across different durations and acts as a “performance fingerprint.”Critical power and critical pace help determine sustainable race intensity and training zones.Real-world wearable data may be more valuable than isolated lab testing because it reflects actual training environments.Athletica uses historical performance data to estimate physiological markers like VO2 max and threshold power.Accurate profiling requires maximal efforts across multiple durations — “garbage in, garbage out.”Profiles can reveal whether an athlete is more “twitchy” (explosive) or “diesel” (endurance-focused).AI coaching can analyze historical workouts and race-specific sessions to estimate realistic race pacing.Race specificity matters: athletes should train in terrain and conditions similar to their target event.Weekly training consistency and frequency may matter more than one extremely long workout.Monitoring threshold trends over time provides insight into long-term fitness progression.Join the Athletica 5K Virtual RaceDr. Paul LaursenPaul Warloski - Simple Endurance CoachingMarjaana Rakai | Nordic Performance Lab

In this episode of The Athletes Compass, Paul Warloski, Dr. Paul Laursen, and Marjaana Rakai discuss how everyday endurance athletes can make meaningful progress with limited training time, especially when balancing work, family, and life. The conversation centers on the “minimum effective dose” of training, why context and goals matter, how to use intensity wisely, and why consistency is often more important than perfection. They also explore the role of strength training, aerobic base work, walk-run programs, HIIT, recovery, habit stacking, and practical scheduling strategies for athletes training around five to seven hours per week.Key episode takeawaysThe best training plan depends on the athlete's goal, background, fitness level, and available time.Five to seven hours per week can be plenty for some goals, such as a 5K, 10K, half marathon, or gravel event, but may be unrealistic for many athletes targeting an Ironman.Consistency is the first priority: spreading workouts across the week is better than cramming all training into one day.For newer athletes, walk-run sessions can produce major aerobic gains without any high-intensity training.HIIT is time-efficient, but it is not necessary or appropriate for every athlete.Three hard training days per week is likely the upper limit for most athletes.Strength training is worth the time investment, even if it is only 10 to 20 minutes at a time.Recovery counts as training, and sometimes performance improves after backing off.Calendar blocking, commuting, dog walks, playground workouts, and habit stacking can help busy athletes stay consistent.Doing something is usually better than doing nothing.Paul Warloski - Simple Endurance CoachingMarjaana Rakai | Nordic Performance Lab

What if endurance performance is not so much about VO2max, lactate threshold, or running economy… but more about the muscular system itself?In this episode, Dr Marius Bakken shares the thinking behind his latest book The Norwegian Method Applied and the decades of experimentation that shaped his approach to endurance training. From double threshold training and lactate controlled intensity to muscle tone, elasticity, and stiffness, this conversation explores performance through a very different lens.The discussion unpacks why sub-threshold training became foundational within the Norwegian system, how muscular state may influence performance and fatigue more than most athletes realize, and why recovery is often misunderstood in modern endurance training.Marius also reflects on his experiences training in Kenya, his observations of elite African runners, and how balancing training load may matter more than any other factor.This episode challenges conventional thinking around endurance performance and opens up a broader discussion about what truly limits adaptation, recovery, and race day performance.Today's speakers:Prof Paul Laursen https://www.paullaursen.com/Dr Marius Bakken  https://www.mariusbakken.com/The Norwegian Method Applied Book: http://geni.us/norwegianmethod

In this episode of The Athletes Compass, Paul Warloski, Dr. Paul Laursen, and Marjaana Rakai explore recovery strategies for everyday endurance athletes, emphasizing that sleep and nutrition remain the foundation while tools like cold water immersion, sauna, compression garments, massage guns, foam rolling, forest bathing, and active recovery can all have a place depending on context. The conversation highlights how cold and heat therapies may support mental clarity, resilience, and heat adaptation, while nature exposure and low-intensity movement can help restore the nervous system. The hosts also discuss gender differences in recovery, especially the mental load and sleep disruptions many women experience, and identify red flags of under-recovery such as declining HRV, flat mood, loss of motivation, and reduced joy in training.Key TakeawaysSleep and nutrition are the “big rocks” of recovery; everything else is a smaller tool to use strategically.Cold water immersion can help with mental reset and acute inflammation, but it may not always be ideal after strength work or heat-adaptation sessions.Sauna and heat exposure can support plasma volume expansion, cardiovascular adaptation, and mental resilience.Compression gear may be most useful in specific contexts, such as travel, swelling, plantar fasciitis, or after hard race weekends.Massage guns, foam rollers, balls, stretching, and massage therapy are all useful ways to pay attention to muscle tone and tightness.Forest bathing and time in nature may support mood, immunity, parasympathetic activity, and nervous system recovery.Women may not necessarily recover differently physiologically, but lifestyle load, hormonal changes, sleep disruption, and the “third shift” can affect recovery capacity.Red flags of under-recovery include low or abnormal HRV trends, loss of motivation, lack of joy, persistent heaviness, poor sleep, and mood changes.Active recovery can sometimes be better than complete rest, especially when it involves gentle movement, time away from screens, or lower-impact modalities.Running is often more neuromuscularly stressful than cycling, swimming, or rowing, so changing modality can help maintain movement while reducing load.Sex Differences in Self-Reported Causes, Symptoms, and Recovery Strategies Associated With Underperformance in Endurance AthletesRandomized controlled trial on the efficacy of forest walking compared to urban walking in enhancing mucosal immunity | Scientific ReportsIsolated and Combined Effects of Cold, Heat and Hypoxia Therapies on Muscle Recovery Following Exercise-Induced Muscle Damage | Sports Medicine | Springer Nature LinkPaul Warloski - Simple Endurance CoachingMarjaana Rakai | Nordic Performance Lab

What really happens to your neuromuscular system after different types of HIIT — and how do we know?This episode does something we've been building toward for years: puts real data behind the HIIT Science taxonomy. Using low-frequency fatigue measurements from Myocene technology, Martin Buchheit tested the taxonomy on himself — mapping how different interval types load and recover the neuromuscular system in ways we previously could only infer.The conversation covers why some sessions crush your legs for 48 hours while others don't, why neuromuscular RPE tracks fatigue better than most coaches expect, and why the distinction between load and response still gets muddled in practice.The episode closes with a second topic: how change of direction changes everything in HIIT prescription — and why acceleration and deceleration capacity need to drive individualization in team sport training.In this episode:Why HIIT has always been about more than metabolic zonesLow-frequency fatigue as an objective window into neuromuscular recoveryConcentric vs. eccentric load — why cycling and running recover so differentlyNeuromuscular RPE: cheap, practical, and surprisingly validRethinking COD-based interval prescription for team sport athletesMartin Buchheit's New Course For those interested in going deeper, Martin's updated course on Load and Response Monitoring in Elite Football is now available inside the HIIT Science course library.It builds on the same ideas discussed here, focusing on how to better connect training load with athlete response using practical frameworks and real world examplesEarly access is currently available for a limited time. You can subscribe to the HIIT Science email list to receive details and access to the discounthttps://hiit-science.thinkific.com/courses/monitoring-load-and-response?ck_subscriber_id=4050821192&utm_source=convertkit&utm_medium=email&utm_campaign=Its%20finally%20here:%20Martin%20Buchheits%20New%20Course%20%F0%9F%8E%89%20-%2021641648

In this episode of The Athletes Compass, Paul Warloski and Dr. Paul Laursen unpack the current high-carb fueling trend in elite endurance sport, sparked by reports of top marathoners consuming 100–120 grams of carbohydrate per hour. The conversation challenges the traditional idea that carb intake primarily boosts performance by sparing muscle glycogen, instead highlighting emerging research suggesting that even small amounts of carbohydrate may work mainly by protecting blood glucose and preventing hypoglycemia. They explore whether high-frequency carb dosing may act more like a brain signal or “performance unlock,” why everyday athletes should be cautious about copying elite fueling strategies, and why training fundamentals still matter far more than gels, shoes, or marginal gains.Key TakeawaysCarbohydrates do improve endurance performance compared with placebo, but the mechanism may not be simple “more fuel equals more speed.”Emerging research discussed in the episode suggests that preventing low blood sugar may be more important than sparing muscle glycogen.Very high carb intakes, such as 90–120g per hour, are being used by some elite marathoners, cyclists, and triathletes, but that does not automatically mean they are right for everyday athletes.High carb dosing may have a brain-mediated or mouth-rinse-like effect, potentially signaling that energy is available and allowing athletes to access another “gear.”More carbohydrate can sometimes increase glycogen use rather than spare it, which complicates the traditional fueling model.High doses of carbohydrate may increase the risk of gastrointestinal distress, especially when not practiced in training.For many age-group and masters athletes, a more moderate fueling approach may be safer and more practical.The hosts emphasize that training, aerobic development, preparation, and consistency matter far more than copying elite nutrition headlines.The role of advanced glycation end products in aging and metabolic diseases: bridging association and causality - PMCCarbohydrate ingestion eliminates hypoglycemia and improves endurance exercise performance in triathletes adapted to very low- and high-carbohydrate isocaloric diets - PubMedCarbohydrate Ingestion on Exercise Metabolism and Physical Performance - PubMedNonenzymatic browning in vivo: possible process for aging of long-lived proteins - PubMedLiver and muscle glycogen oxidation and performance with dose variation of glucose-fructose ingestion during prolonged (3 h) exercise - PubMedCarbohydrate dose influences liver and muscle glycogen oxidation and performance during prolonged exercise - PubMedThe effect of carbohydrate mouth rinse on 1-h cycle time trial performance - PubMedPaul Warloski - Simple Endurance Coaching

In this episode of The Athletes Compass, Dr. Allie Wagener, a licensed psychologist specializing in sport and performance psychology, joins Paul Warloski, Marjaana Rakai, and Dr. Paul Laursen to unpack athlete burnout: what it is, how it differs from fatigue or a training slump, and how endurance athletes can recognize the warning signs before they become overwhelming. The conversation explores mood shifts, loss of joy, identity, fear of failure, recovery, autonomy, social connection, and the importance of reconnecting with your “why.” Dr. Wagener emphasizes that burnout recovery is not about rushing back to intensity, but about rebuilding trust, consistency, psychological safety, and fun in sport.Key TakeawaysBurnout is different from ordinary fatigue or a temporary slump. Fatigue may improve with rest, and slumps still usually include motivation, while burnout is more chronic and can feel like depletion, apathy, and loss of pride in performance.Early warning signs include mood shifts, irritability, slower recovery from tough sessions, loss of enthusiasm, “I have to” thinking, zoning out, or becoming hyper-focused on discomfort.Self-awareness is a major protective factor. Athletes can check in before and after training by asking how they feel, where their focus is, and whether they felt engaged or committed.Reconnecting with your “why” helps athletes separate performance outcomes from deeper sources of meaning, joy, and identity.Recovery should be treated as part of training, not as an optional extra. Sleep, nutrition, hormone regulation, memory consolidation, and mental health all depend on recovery.Joy and play matter. Dr. Wagener encourages athletes to adopt a “Sandlot mentality”: less structure, more play, more connection, and more fun.Training with others, changing locations, removing the watch, and adding novelty can help athletes rebuild motivation.Dr. Allie WagenerPerformance Psychologist | Minneapolis MN + Virtual | Sport & Executive CoachingPaul Warloski - Simple Endurance CoachingMarjaana Rakai | Nordic Performance Lab

What if you could bring lab level physiology into every training session?Arnar Larusson is the founder of Tymewear and is working to make breathing data accessible outside the lab, giving athletes real time insight into how their body is actually responding to training.Coming from a background in mechanical engineering and prosthetics, Arnar saw the gap between what we can measure in controlled environments and what athletes can access in the real world.This conversation explores how ventilation and breathing patterns reveal intensity, efficiency, and stress in ways that heart rate and power alone cannot.From identifying ventilatory thresholds to understanding fatigue and durability, this episode looks at how breathing data could reshape how we train and measure performance.Today's speakers:Prof Paul Laursen https://www.paullaursen.com/Arnar Larusson https://www.linkedin.com/in/arnar-larusson-58872a2b/ Tymewear: www.tymewear.com

What if you could predict your race before you even start?In this episode, Ryan Cooper shares the story behind one of endurance sport's most influential tools, Best Bike Split. With a background in electrical engineering and aerospace, Ryan saw early on that the same physics used in aviation could be applied to cycling and triathlon performance.We dive into how power meters and modeling unlocked a new way to race, why normalized power became a game changer for long course athletes, and how smart pacing can make or break your entire performance.From early prototypes during the Tour de France to real world validation at world championship races, this episode is a behind the scenes look at how data, physics, and practical application came together to change the way athletes approach race day.Today's speakers:Prof Paul Laursen https://www.paullaursen.com/Ryan Cooper https://www.linkedin.com/in/ryan-f-cooper/

What if your biggest performance limiter isn't your fitness, but your nervous system?In this episode, Lawrence van Lingen shares a radically different lens on endurance performance, one that shifts the focus from traditional training metrics to fascia, breath, and vagal tone. Drawing from years of work with elite athletes like Andi Böcherer and Jan Frodeno, Lawrence explains how movement efficiency, recovery, and performance breakthroughs often come from restoring internal balance rather than pushing harder.We explore why breathing mechanics and nervous system health are foundational to performance, how simple practices like walking and crawling-like movements can create massive changes, and why many athletes struggle not from lack of effort but from an inability to absorb training.This conversation challenges conventional thinking and offers a new way to approach performance, recovery, and long term health.Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/Lawrence van Lingen https://www.lawrencevanlingen.com/https://www.youtube.com/@LawrencevanLingen

What actually drives performance in professional cycling, and how much of it is science versus experience?In this episode, Dr David Bailey joins us to unpack over two decades of work across Olympic sport and WorldTour cycling. From talent identification and training philosophy to nutrition, heat, altitude, and the evolving role of data, David shares what really matters when building high performance athletes.We dive into the concept of marginal gains and why most people misunderstand it, how teams prioritize what actually moves the needle, and why talent and training still outweigh everything else. The conversation also explores real world applications of AI, individualized nutrition strategies, and the complex mix of physiology, psychology, and race strategy that ultimately decides who wins.___________________Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/Dr David Bailey https://www.linkedin.com/in/david-bailey-77111640/

What can heart rate variability actually tell us about training, recovery, and long term health, and where do most people still get it wrong?In this episode, Dr Greg Grosicki joins us to unpack the science and practical value of HRV, from what it really measures to why context matters so much when interpreting it. We explore how exercise intensity, sleep, alcohol, sickness, hydration, and metabolic health can all shape HRV, and why a single daily score often tells only part of the story.We also dive into Greg's new work on HRV CV, a promising way to understand the stability of recovery over time, and discuss how wearables at scale are changing the kinds of questions sports science can answer.Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/Dr Greg Grosicki https://www.linkedin.com/in/gregorygrosicki/Greg's new paper: https://journals.physiology.org/doi/full/10.1152/ajpheart.00738.2025?rfr_dat=cr_pub++0pubmed&url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org

What actually changes as we age as athletes, and how should training evolve if we want to keep performing while protecting long term health?In this episode, Professor Peter Reaburn joins us to explore the science and real world practice of training as a masters athlete. Drawing on decades of research and personal experience as an endurance athlete, Peter explains why resistance training becomes essential with age, how recovery changes, and why training the same way you did in your twenties no longer works.We discuss muscle loss, polarized training, protein intake, and the importance of balancing performance with longevity. The conversation also dives into heart health considerations for aging endurance athletes and why listening to your body may be the most important skill masters athletes can develop.Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/Prof Peter Reaburn https://www.linkedin.com/in/peter-reaburn-8a498b12/

Does high intensity training really build the strongest heart, or is it time in Zone 1 and Zone 2 that truly drives cardiac adaptation?In this episode, Dr Guido Claessen joins us to unpack a landmark longitudinal MRI study on endurance athletes that challenges common assumptions about HIIT and heart remodeling. They explore what actually builds the “athletic heart,” why low intensity volume matters more than most think, and what this means for polarized training.They also tackle the harder questions lifelong athletes worry about including atrial fibrillation, coronary plaque, myocarditis, and how much endurance sport might be too much.________________________Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/   Dr Guido Claessen https://www.linkedin.com/in/guido-claessen-936a18a9/

We sit down with Prof Guillaume Millet to get clear on what fatigue actually is, why durability became the new buzzword, and what really limits performance in ultra endurance events. We dig into central vs peripheral fatigue, why muscle damage matters so much in trail and mountain running, and how shock weekends can build the resilience you cannot fake on race day. We also talk heat, perceived exertion, field monitoring tools, and his new Zero to 100 project taking sedentary adults to a 100k mountain race in 18 months.References:https://pubmed.ncbi.nlm.nih.gov/22323647/https://pubmed.ncbi.nlm.nih.gov/39405022/https://journals.physiology.org/doi/full/10.1152/japplphysiol.00692.2025?rfr_dat=cr_pub++0pubmed&url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org_____________________ Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/   Prof Guillaume Millet https://www.linkedin.com/in/kinesiologui/

Episode 200 marks a major milestone for us, and we celebrate it with someone who played a foundational role in our journey. Professor Ken Nosaka joins us to reflect on how eccentric training research shaped modern training practice and brought our paths together.We revisit the early ECU years, then dive deep into what Ken's research has taught us about muscle soreness, muscle damage, the repeated bout effect, and how adaptation really works. This episode blends history, science, and real world coaching insights that still shape how we train today.

In this episode, we sit down with Dr Andrew Koutnik to unpack one of the most discussed sports science reviews in recent years. Drawing on more than 100 years of research and a series of tightly controlled trials, we examine evidence that challenges the long-held belief that more carbohydrates automatically lead to better performance.We explore why muscle glycogen and carbohydrate oxidation do not consistently predict performance, how athletes can sustain high-intensity and endurance output with much lower carbohydrate intake, and why protecting brain energy may be a key limiter during exercise.The conversation also examines why some highly trained athletes still show markers of poor metabolic health, what this means for current fueling guidelines, and why context matters when translating science into real-world practice._____________________ References:https://academic.oup.com/edrv/advance-article/doi/10.1210/endrev/bnaf038/8432248?login=false_____________________ Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/   Dr Andrew Koutnik https://www.instagram.com/andrewkoutnikphd/

In this episode, we sit down with Professor Arne Güllich to unpack one of the most talked about sports science papers in years, recently published in Science. Drawing from data on more than 30,000 high performers across sport, music, chess, and science, the conversation challenges the belief that early dominance and early specialization are the keys to elite success.Arne breaks down the now viral performance trajectory figure, explores why most world class adults were not standout juniors, and explains what truly separates those who peak at the highest level from those who plateau. The discussion moves from theory to practice as Paul reflects on his role as a parent of a 15 year old swimmer, asking the questions many parents and coaches are quietly wrestling with.This episode is essential listening for anyone involved in youth sport, talent development, or long term athlete health and performance.References:https://www.science.org/doi/10.1126/science.adt7790_____________________ Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/   Prof Arne Güllich: https://www.linkedin.com/in/arne-g%C3%BCllich-4438a7376/_____________________ 

In this episode of the Training Science Podcast, Prof Paul Laursen is joined by Stephan Nüsser, performance physiologist and founder of a performance diagnostics lab in Germany, for a deep and practical discussion on lactate testing and endurance performance. Drawing from decades of applied work with cyclists, endurance athletes, and motocross professionals, Stephan explains how lactate can be used to individualize training, define true Zone 2 intensity, and guide long-term athlete development.The conversation explores why lactate is often misunderstood, how production and clearance reflect underlying metabolism, and why longer step protocols can provide clearer insight than fixed threshold formulas. They also discuss carb-optimized nutrition, metabolic flexibility, and why training and fueling should be viewed as a single integrated system rather than separate decisions.References:https://sndc.de/_____________________ Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/   Stephan Nüsser: https://www.instagram.com/sndcde/_____________________ 

In this episode of the Training Science Podcast, Prof Paul Laursen sits down with Professor Anthony Turner to unpack the fundamental laws that underpin performance in every sport, from explosive team games to marathon running and cycling. Instead of debating opinions or trends, Anthony brings everything back to first principles: Newton's laws of motion, impulse, force, and the biomechanics of movement.Using endurance running as the main example, the conversation explores why strength training is just as essential as VO₂max and threshold for performance and economy. Ant explains how maximum strength and rate of force development shape running economy, ground contact time, stretch-shortening cycle efficiency, and ultimately time to exhaustion. They then extend these concepts to running, cycling, and long-term robustness.Listeners will also learn how to progress strength logically: from movement quality and symmetry, to heavy lifting, to power work and plyometrics, all while staying healthy and reducing injury risk. Whether you coach team sports, work with endurance athletes, or train yourself, this episode will change the way you think about strength training, biomechanics, and sport performance.Perfect for anyone interested in strength and conditioning, running economy, endurance performance, injury prevention, and applied sport science.References:https://thefitnessformula.training/_____________________ Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/   Anthony Turner: https://www.linkedin.com/in/anthony-turner-62073788/_____________________ 

In this episode of the Training Science Podcast, Prof. Paul Laursen sits down with Athletica's AI modeling lead, Dr. Andrea Zignoli, to break down how artificial intelligence is transforming endurance training. Fresh off publishing three major SPSR papers, Andrea explains the evolution of AI systems inside Athletica — from agent-based modeling, to AI-assisted HRV readiness monitoring, to the use of sentiment as a new internal load signal.Paul and Andrea explore how structured “AI agent” architectures and retrieval-augmented generation (RAG) systems allow large language models to move beyond basic chatbot behavior and become powerful tools for interpreting training data, detecting patterns, and supporting smarter athlete decision-making. They also look ahead at “Sport Science 3.0,” a future where coaching remains deeply human but is amplified by AI that can read files, interpret readiness, understand emotional states, and contextualize performance.Whether you're a coach, athlete, sport scientist, or tech-minded performance professional, this episode offers a clear look at how AI is already shaping modern training — and what's coming next.References:https://tiscourse.vercel.app/abouthttps://sportperfsci.com/the-computational-paths-of-knowledge-in-ai-coaching/https://sportperfsci.com/sports-science-3-0-series-ai-assisted-hrv-monitoring-enhancing-training-load-response-and-decision-making/https://sportperfsci.com/signatures-of-fatigue-transformer-based-sentiment-analysis-for-internal-load-monitoring/_____________________ Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/   Dr. Andrea Zignoli: https://andreazignoli.github.io/ _____________________ 

In this episode of the Training Science Podcast, host Dr. Paul Laursen sits down with neuroscientist and performance expert Dr. Tommy Wood to explore the science behind The Stimulated Mind, Tommy's groundbreaking approach to optimizing brain health and cognitive performance.They dive into the key pillars of a thriving brain: environment, nutrition, metabolic health, sleep, and exercise. From the neonatal ICU to Formula 1 racing, Dr. Wood connects how our environment, movement, and mindset shape cognitive longevity and peak performance. Whether you're a coach, athlete, or simply striving to think and feel better, this conversation will help you unlock the full potential of your mind and body.References:Substack: https://www.betterbrain.fitness/The Stimulated Mind by Dr. Tommy Wood: https://www.penguinrandomhouse.com/books/751292/the-stimulated-mind-by-dr-tommy-wood/_____________________ Today's speakers:Prof Paul Laursen  https://www.paullaursen.com/   Instagram: https://www.instagram.com/drtommywood/_____________________ 

Top Episode Replay:Motivation comes from LOVING

IQBAR is offering our special podcast listeners 20% OFF all IQBAR products, plus get FREE shipping. To get your 20% off, text VANESSA to 64000. That's VANESSA to sixty-four thousand. Message and data rates may apply. See terms for details. Today's episode is a deep-dive recap of my mind-blowing conversation with Dr. Paul Laursen — one of the world's top experts in exercise physiology, high-intensity interval training (HIIT), and fat-adapted performance. If you've ever wondered: Why you feel better fat-fueled than carb-loaded How diet actually drives fat loss more than training Why ketones might be more than a fuel — and actually a proxy for VO₂ max How to optimize your metabolic flexibility using HIIT and protein-forward nutrition …this episode will change how you see your body composition journey — especially if you've been trying to out-exercise a poor diet.

IQBAR is offering our special podcast listeners 20% OFF all IQBAR products, plus get FREE shipping. To get your 20% off, text VANESSA to 64000. That's VANESSA to sixty-four thousand. Message and data rates may apply. See terms for details. Today's guest is Dr. Paul Laursen — exercise physiologist, endurance coach, co-author of HIIT Science: The Science and Application of High-Intensity Interval Training, and co-founder of Athletica.ai. Dr. Laursen has coached athletes to 17 world championships, and his research on HIIT, metabolic flexibility, and low-carb nutrition has shaped how athletes and everyday people train for health and performance. In this episode, we cover: Why diet—not exercise—is the key driver of fat loss (and the clinical study that proved it) How being fat-fueled is actually a proxy for VO₂ max, a key marker of cardiovascular fitness and longevity The difference between burning carbs vs. burning fat during exercise — and why metabolic flexibility matters for performance and health How to use HIIT protocols strategically for fat loss, insulin sensitivity, and body recomposition without overtraining Why low-carb and very low-carb high-fat diets can supercharge fat oxidation, recovery, and cognitive clarity The role of ketones in appetite control, recovery, and brain performance Dr. Laursen's top recommendations for training, nutrition, and recovery to optimize body composition and metabolic health Whether you're an athlete, a weekend warrior, or someone looking to improve body composition and metabolic resilience, this conversation is packed with actionable strategies to help you get leaner, stronger, and more metabolically fit. Connect with Vanessa on Instagram @ketogenicgirl Free High-Protein Keto Guide Get 20% off on the Tone LUX Crystal Red Light Therapy Mask or the Tone Device breath ketone analyzer at Ketogenicgirl.com with the code VANESSA Join the Community! Follow Vanessa on Instagram to see her meals, recipes, informative posts, and much more! Click here @ketogenicgirl Follow @optimalproteinpodcast on Instagram to see visuals and posts mentioned on this podcast. Link to join the Facebook group for the podcast: The content provided in this podcast is for informational purposes only and should not be construed as medical advice. Consult with a healthcare professional before making significant changes to your diet or exercise regimen.

The world of AI is changing extraordinarily fast. We spoke with Dr. Paul Laursen about the current challenges and developments of the technology.  Learn more about your ad choices. Visit megaphone.fm/adchoices