Critical Oxygen

In this episode of the Critical Oxygen Podcast, Dr. Alyssa Olenick and I discuss endurance and hybrid training, focusing how we balance volume and intensity, and the importance of consistency in training. We explore Alyssa's journey from athlete to academic to coach + athlete. Her insights on training load, and the role of cross-training in optimizing performance. We emphasize that more isn't always better and that understanding one's body and training needs is crucial for success in endurance sports. We also discuss the intricacies of hybrid training, discussing what it is, its benefits, the importance of cross-training, and the role of nutrition and sleep in optimizing performance. We clarify the distinction between hybrid and concurrent training, emphasizing the need for a balanced approach to strength and endurance. The discussion also highlights common misconceptions about the interference effect of endurance training on strength gains and the critical role of adequate nutrition and recovery in achieving athletic goals.More info on Dr. Alyssa Olenick:As founder of Doc Lyss Fitness and creator of The Lyss Method, she designs transformative strength, endurance, and hybrid training programs. A certified sports nutritionist, CrossFit Level 2 Trainer, ultra-marathon runner, and strength athlete herself, Alyssa lives the principles she teaches. Her mission: translate complex science into accessible strategies that empower clients to thrive—whether in the gym, on roads, or exploring trails. Dr. Olenick bridges the gap between research and results-driven training.Learn more at www.doclyssfitness.com and www.thelyssmethod.com TAKEAWAYS- Consistency in training leads to better adaptation and performance.- Cross-training can help improve fitness without the risk of overuse injuries.- Hybrid training aims to maximize both strength and endurance simultaneously.- For most people the interference effect of endurance training on strength is minimal.Enjoying these podcasts, subscribe to get notified when new episodes are released. If you have a question or topic you want me to address, leave a comment!Follow Phil on Instagram - https://www.instagram.com/drphilbattersonInterested in learning more about physiology? Check out the Critical Oxygen website for blogs, courses, and coaching - https://www.criticaloxygen.com/CHAPTERS00:00 Introduction to Endurance Training and Optimization03:00 Alyssa Olenick's Journey in Fitness and Academia06:10 The Balance of Training: Volume vs. Intensity08:58 Injury Management and Training Smart11:45 The Importance of Consistency in Training15:10 Understanding Training Load and Adaptation18:08 The Nuances of Training for Different Goals21:03 The Role of Cross-Training in Endurance Training23:56 Final Thoughts on Training Effectiveness36:09 The Benefits of Cross-Training39:37 Understanding Hybrid Training44:47 Defining Hybrid vs. Concurrent Training48:52 The Interference Effect in Training55:07 Nutrition's Role in Hybrid Training01:00:50 Optimizing Sleep for Performance01:06:24 Simplifying Training for Better ResultsKEYWORDS endurance training, hybrid training, injury management, training load, consistency, volume vs intensity, cross-training, fitness optimization, exercise physiology, athlete performance, cross-training, hybrid training, concurrent training, nutrition, sleep optimization, athletic performance, endurance, strength training, recovery, training strategies

IF you want to check out rythm health use OPQYFS1L at https://rythmhealth.com for $20 off your first order. In this episode of the Critical Oxygen podcast, it's just me! In the first solo episode where I discuss my recent physiological testing, and the actionable data I got from the tests. I share my current training, goals, and the specific tests conducted over a week, including 2 performance tests, a 5min all-out test, uphill run. AND 2 physiological tests, a 3-1 limiter assessment and an incline treadmill run. The episode highlights the significance of consistency, nutrition, and monitoring health through blood work, ultimately aiming to optimize endurance performance. I also discuss my training strategy as I transition from VO2 max work to threshold training, emphasizing the importance of protein, and carb intake and caloric management for endurance athletes. I explain the significance of resting metabolism tests and how to interpret RMR results. The conversation also covers the balance between carbohydrates and fats in an athlete's diet, the importance of performance metrics like my Hill test, and the use of technology in physiological testing. Finally, I introduce the concept of a limiter assessment to identify the most significant factors limiting endurance performance. I explain how to determine individual training needs based on physiological data, the significance of incremental treadmill testing, and the relevance of fat max testing for endurance athletes and when to use it or not use it. Throughout the discussion, I emphasize the need for personalized training protocols and the practical applications of test results to optimize performance and overall fitness. TAKEAWAYS - Actionable data from physiological tests is crucial for improvement. - Consistency, specificity, and progression are essential for fitness gains. - Physiological testing helps identify training zones and limitations. - Regular physiological assessments can guide training adjustments. Enjoy! Enjoying these podcasts, subscribe to get notified when new episodes are released. If you have a question or topic you want me to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Interested in being coached by me? Book a free consultation here - https://calendly.com/batterson-phil/critical-connection CHAPTERS 00:00 Introduction to Physiological Testing 02:02 The Importance of Actionable Data 04:51 Personal Training Context and Goals 08:53 Overview of Testing Week 18:04 Detailed Breakdown of Tests 36:01 Results and Insights from Testing 46:04 Transitioning from VO2 Max to Threshold Work 48:27 Understanding Resting Metabolism and RMR Testing 50:48 The Importance of Protein in Endurance Training 52:43 Carbohydrate vs. Fat: Finding the Right Balance 54:36 Tracking Caloric Intake and Weight Management 55:07 Understanding RMR and CO2 Measurement 58:56 The Hill Test: Measuring Performance 01:01:49 Assessing Max Heart Rate and Performance Metrics 01:04:45 Using Technology for Physiological Testing 01:10:57 Conducting a Limiter Assessment for Endurance Performance 01:33:55 Understanding Limiter Assessments 01:38:05 Determining Training Zones 01:46:36 Incremental Treadmill Testing Protocols 01:55:36 Analyzing VO2 Max and Performance Metrics 02:01:52 Practical Applications of Testing Results 02:10:16 Fat Max Testing and Its Relevance 02:18:31 Reflections on Physiological Testing KEYWORDS physiological testing, VO2 max, endurance training, performance optimization, fitness goals, training consistency, nutrition, injury prevention, blood work, exercise physiology, VO2 Max, Threshold Work, RMR Testing, Endurance Training, Protein Intake, Weight Management, Performance Metrics, Physiological Testing, Limiter Assessment, limiter assessment, training zones, VO2 max, performance metrics, physiological testing, endurance training, incremental treadmill test, fat max testing, exercise physiology, training optimization

In this episode of the Critical Oxygen podcast, Coach Aaron Geiser and I discuss how to improve swimming performance for triathletes. We emphasize the importance of proper swim form, the role of video analysis in identifying deficiencies, and the need for a focused approach to training. We highlight how small adjustments in technique can lead to significant improvements in efficiency and performance, as well as the importance of consistency and mindset in endurance training. We also discuss effective strategies for swim training, emphasizing the importance of breaking down sets, progression in training, and the significance of swim form and technique. The discussion highlights the need for safety, confidence, and the enjoyment of the swimming process, while also encouraging athletes to utilize video analysis for improving their swim form. TAKEAWAYS - Proper swim form is crucial for efficiency. - Swimming more does not guarantee faster times. - Video analysis helps identify and correct deficiencies. - Focus on one aspect of technique at a time. - Hydrodynamics play a significant role in swimming performance. Enjoy! Enjoying these podcasts, subscribe to get notified when new episodes are released. If you have a question or topic you want us to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Follow Aaron on Instagram - https://www.instagram.com/triageiser/ Interested in learning more about physiology? Check out the Critical Oxygen website for blogs, courses, and coaching - https://www.criticaloxygen.com/ CHAPTERS 00:00 Introduction 02:32 The Importance of Swimming Form 04:24 Building Efficient Swim Techniques 11:21 Utilizing Video for Swim Improvement 17:11 Reprogramming Swim Stroke for Efficiency 23:20 Mindset and Consistency in Training 30:32 Progressing Swim Volume and Specificity 31:00 Optimizing Swim Training: Breaking Down Sets 35:55 Progression in Swimming: Building Endurance and Speed 41:08 The Importance of Swim Form and Technique 44:00 Critical Swim Speed: Understanding Pacing and Performance 52:01 Open Water Swimming: Transitioning from Pool to Open Water KEYWORDS endurance, swimming, triathlon, swim form, efficiency, training, coaching, performance, technique, video analysis, swimming, swim training, endurance, swim form, critical swim speed, open water swimming, triathlon, performance, technique, progression

In this episode of Fast Physiology on the Critical Oxygen Podcast, Dave Schell and I discuss fatigue. We explore the physiological mechanisms, the role of ATP in muscle contraction, and how specific training can enhance fatigue resistance. We discuss the protective nature of fatigue (i.e. why we fatigue), the importance of understanding metabolic acidosis, and the need for tailored training to prepare for endurance events. The conversation emphasizes the multifactorial aspects of fatigue and the significance of maintaining ATP levels during exercise. TAKEAWAYS - Fatigue is a protective mechanism to prevent catastrophic muscle damage. - Mitochondria help buffer hydrogen ions during exercise. - Factors like heat, and metabolic acidosis contribute to fatigue through different mechanisms. If you have a question or topic you want us to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Follow Dave on Instagram - https://www.instagram.com/kaizenendurance/ OR YouTube - https://www.youtube.com/@UCT5Cy95BiLIDQh4KS5bohhQ Interested in Gravel or Mountain Bike Coach? Head to Dave's website - https://www.kaizenendurance.coach/ Want to learn more physiology, check out my blog, and courses - https://www.criticaloxygen.com/ CHAPTERS 00:00 Understanding Fatigue: A Protective Mechanism 07:00 Physiological Mechanisms Behind Fatigue 13:07 The Role of ATP and Muscle Contraction 21:05 Training for Fatigue Resistance 25:01 Key Takeaways and Conclusion KEYWORDS fatigue, exercise physiology, ATP, muscle contraction, endurance training, metabolic acidosis, performance, fatigue resistance, physiological mechanisms, training adaptation

In this episode of the Critical Oxygen Podcast, Dr. Maria Fuentes, M.D. and I discuss the critical role of heat shock proteins in exercise and disease. More about Dr. Maria Fuentes: Dr Fuentes is a U.S. ECFMG Certified M.D. and graduated with a Master's in Public Health from The University of Texas at El Paso in 2018. Born and raised in El Paso, Texas, Maria has focused her research studies and gained experience on different areas of medicine and public health that affect the health of the community of both El Paso and Juarez, Mexico including infectious diseases and environmental health. Maria is now pursuing her PhD in Interdisciplinary Health Sciences, at UTEP, studying the the effects of climate change, such as heat waves, on the expression of Heat Shock Proteins (HSP) 27 and 70 and their association with kidney injuries. She is currently a full-time faculty member at the Department of Biology at the El Paso Community College teaching Biology, Anatomy and Physiology courses as well as a guest lecturer at the Department of Public Health at UTEP teaching courses on statistics and public health evaluation. With a background in medicine and public health, Dr. Fuentes explains how these proteins function as cellular protectors during stress, their implications in kidney health, and the need for further research in understanding their roles in various pathophysiologies. The conversation explores links to exercise physiology and public health, emphasizing the importance of understanding the body's responses to stress and the potential for future research in this area. In this conversation, Dr. Maria Fuentes discusses the fascinating role of heat shock proteins (HSPs) in exercise physiology, muscle recovery, and their potential as biomarkers for kidney health. TAKEAWAYS - Heat shock proteins are essential for protein folding and function. - Cellular stress can activate heat shock proteins, not just exercise! - Heat shock proteins play a protective role in cellular integrity. - The immune response can be activated by heat shock proteins in circulation. - Increased expression of heat shock proteins help the body adapt to future stresses. Enjoy! Enjoying these podcasts, subscribe to get notified when new episodes are released. If you have a question or topic you want me to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Interested in learning more about physiology? Check out the Critical Oxygen website for blogs, courses and coaching -https://www.criticaloxygen.com/ CHAPTERS 00:00 Introduction to Heat Shock Proteins 04:58 Dr. Fuentes' Journey in Medicine and Research 09:52 Understanding Heat Shock Proteins 19:46 The Role of Heat Shock Proteins in Cellular Stress 30:07 Heat Shock Proteins and Immune Response 35:12 Pathophysiology and Future Research Directions 37:54 Exploring the Fascination of Heat Shock Proteins 39:15 The Role of Heat Shock Proteins in Exercise 42:07 Understanding Heat Shock Proteins and Muscle Recovery 45:00 Heat Shock Proteins and Mitochondrial Function 52:54 Heat Shock Proteins as Biomarkers for Kidney Health 58:49 Thermal Regulation and Adaptation to Heat 01:10:04 Key Takeaways on Heat Shock Proteins and Exercise KEYWORDS heat shock proteins, exercise physiology, cellular stress, immune response, kidney health, metabolic syndrome, public health, research, endurance athletes, protein folding, heat shock proteins, exercise physiology, muscle recovery, mitochondrial function, biomarkers, kidney health, thermal regulation, stress response, endurance training, health and wellness

In this episode, Coach Aaron Geiser and I discuss the characteristics of successful endurance athletes in light of our recent involvement at the Men's IM World Championships in Kona Hawaii. We explore the importance of cooling strategies for performance especially when racing in hot environments like Kona. We emphasize the significance of community building among athletes and the challenges faced during the race, including unexpected weather conditions and the impact of jellyfish on swimmers. We then turn to the topic of the episode, a discussion of what we think makes an endurance athlete successful. We highlight effective training plans, discipline, and the role of rituals in managing stress and enhancing performance. We emphasize the need for consistency, discipline, and smart decision-making in training and racing. TAKEAWAYS - Successful endurance athletes often follow a disciplined training plan. - Balancing stress and recovery is crucial for endurance athletes. - Consistency in training is the key to success. - Athletes must arrive at the start line healthy. - Making in-the-moment decisions can impact race outcomes. Experience helps athletes make better decisions during races. Enjoy! Enjoying these podcasts, subscribe to get notified when new episodes are released. If you have a question or topic you want us to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Follow Aaron on Instagram - https://www.instagram.com/triageiser/ Interested in learning more about physiology? Check out the Critical Oxygen website for blogs, courses, and coaching - https://www.criticaloxygen.com/ CHAPTERS 00:00 Introduction to Endurance Success 13:11 Kona World Championships Recap 19:45 Athlete Performance Insights 35:03 Cooling Strategies for Endurance Athletes 36:24 Heat Training and Performance 38:47 Principles of Success in Endurance Events 39:55 Defining Success in Endurance Sports 42:31 Key Characteristics of Successful Athletes 44:42 Making In-the-Moment Decisions 46:12 The Importance of Experience in Racing 48:05 Sticking to a Race Plan 51:41 Adapting to Race Conditions 54:22 The Role of Discipline in Training 57:02 Smart Decisions Leading Up to Race Day 01:00:27 Consistency and Discipline for Success 01:03:51 Basic Principles of Endurance Success KEYWORDS endurance athletes, Kona, Ironman, performance, physiology, coaching, training, success, cooling strategies, athlete insights, heat training, endurance events, athlete success, race strategy, training discipline, performance, Ironman, decision making, pacing, consistency

In this episode of Fast Physiology on the Critical Oxygen Podcast, Dave Schell and I engage in a spirited debate about the utility and accuracy of physiological assessments, particularly ramp/step tests. We discuss the importance of understanding physiological variables, the differences between lab and field tests, and the value of physiological testing in tracking performance over time. We also discuss the nuances of physiological testing and how different types of tests can effect physiological outcomes. The conversation highlights the nuances of testing methods and the need for flexibility in training approaches. TAKEAWAYS 1) Physiological assessments are crucial for understanding an athlete's underlying physiology and their endurance performance potential. 2) Ramp and step tests can provide valuable information but their design is nuanced and there are some potential limitations. 3) Field tests may offer practical alternatives to lab tests but do not directly measure physiological outcomes. We would love for you to weigh in, what's your take on the use of physiological testing for coaching endurance athletes? If you have a question or topic you want us to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Follow Dave on Instagram - https://www.instagram.com/kaizenendurance/ OR YouTube - https://www.youtube.com/@UCT5Cy95BiLIDQh4KS5bohhQ Interested in Gravel or Mountain Bike Coach? Head to Dave's website - https://www.kaizenendurance.coach/ Want to learn more physiology, check out my blog, and courses - https://www.criticaloxygen.com/ CHAPTERS 00:00 Introduction to Physiological Assessment 02:02 The Debate on Ramp Tests 08:35 Understanding Physiological Variables 15:52 Field Tests vs. Lab Tests 22:48 The Value of Physiological Testing KEYWORDS physiological assessment, ramp tests, endurance training, VO2 max, exercise physiology, field tests, lab tests, performance tracking, endurance athletes, training methods

In this episode of the Critical Oxygen podcast, Dr. Mike T. Nelson and I discuss metabolic and physiological flexibility, and explore their significance in human performance and health. We discuss the importance of being able to switch between carbohydrate and fat metabolism, the role of exercise in enhancing metabolic flexibility, and the implications of research findings on variability in metabolism. The conversation also touches on practical applications for athletes and individuals looking to optimize their metabolic health through tailored training and nutrition strategies. In this conversation, we discusses the importance of metabolic and physiological flexibility, mitochondrial health, and the role of exercise in enhancing metabolic adaptation. We emphasize the significance the concept of physiological flexibility, which includes temperature regulation, pH balance, and oxygen/CO2 management. The discussion highlights the interconnectedness of these physiological systems and the necessity of a balanced approach to training and recovery. TAKEAWAYS - Metabolic flexibility is the ability to switch between carbohydrate and fat metabolism. - Exercise plays a crucial role in enhancing metabolic flexibility. - Insulin acts as a fuel selector switch in the body. - Physiological flexibility involves maintaining temperature, pH, and gas exchange in the face of greatly changing stress environments. Enjoy! More about Mike: Mike T. Nelson, PhD, MSME, CSCS, CISSN, is a research fanatic who specializes in metabolic flexibility, heart rate variability, and human performance. He has spent 20 years of his life learning how the human body works. He has a PhD in Exercise Physiology, and a MS in Mechanical Engineering (biomechanics). He's an Associate Professor at the Carrick Institute, university instructor at Rocky Mountain University, creator of the Flex Diet Certification & Physiologic Flexibility Cert and a Human Optimization Specialist with the Special Forces Experience. He also is the Research and Human Performance Science Advisor at Tecton -makers of a unique ketone ester, and performance analysis with Rapid Health. He has published research in both physiology and engineering peer-reviewed journals. He's even been called in to share his techniques with top military agencies. In his free time he enjoys spending time with his wife, lifting odd objects, going to metal concerts, and kiteboarding. Find out more at www.miketnelson.com Enjoying these podcasts, subscribe to get notified when new episodes are released. If you have a question or topic you want me to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Interested in learning more about physiology? Check out the critical oxygen website for blogs, courses and coaching -https://www.criticaloxygen.com/ CHAPTERS 00:00 Understanding Metabolic Flexibility 10:13 The Journey into Human Optimization 19:59 Research Insights on Variability and Metabolism 29:45 Practical Applications of Metabolic Flexibility 40:14 Training for Optimal Metabolic Health 54:36 Metabolic Flexibility and Mitochondrial Health 01:01:05 The Role of Exercise in Metabolic Adaptation 01:06:42 Strength Training and Muscle Mass Preservation 01:12:46 Physiological Flexibility: Understanding the Four Pillars 01:16:36 The Interconnectedness of Physiological Systems KEYWORDS metabolic flexibility, exercise physiology, heart rate variability, human performance, endurance training, carbohydrate metabolism, fat metabolism, physiological testing, energy systems, health optimization, metabolic flexibility, mitochondrial health, exercise adaptation, strength training, physiological flexibility, muscle mass, recovery, high intensity training, CO2 tolerance, health optimization

In this episode of the Critical Oxygen podcast, Benedict Meixner and I discuss, maximal glycolytic rate (VLaMax) and how its measured through a 15-second all-out sprint test. VLaMax refers to the maximal rate of glycolysis or maximal glycolytic rate, which is measured through the end product of glycolysis, lactate. The standard VLA Max protocol involves a 10-minute warm-up at 1.5 w/kg, followed by a 15-second all-out sprint on an electronically braked ergometer set to isokinetic mode. Lactate measurements are taken at rest, immediately after the sprint, and every minute for up to 8 minutes. The highest blood lactate value is used to determine VLaMax. In this conversation, Benedikt and I discuss the measurement and interpretation of VLaMax for endurance athletes. We explore different methods of measuring VLaMax, including the use of Delta lactate and phosphogen contribution time. We also discuss the relationship between VLaMax, power output, and fat-free mass. The conversation highlights the importance of standardized protocols and the challenges of comparing VLaMax values across individuals. The main takeaway is that VLaMax is a significant predictor of power output in sprinting, but further research is needed to understand its relationship to endurance exercise and substrate utilization. TAKEAWAYS - VLaMax refers to the maximal rate of glycolysis or maximal glycolytic rate, measured through blood lactate production. - The standard VLaMax protocol involves a 15-second all-out sprint on an ergometer set to isokinetic mode. -VLaMax is influenced by factors such as power output and fat-free mass. - Further research is needed to understand the relationship between VLaMax and endurance exercise, substrate utilization, and the effects of diet and training on VLaMax Enjoy! Enjoying these podcasts, subscribe to get notified when new episodes are released. If you have a question or topic you want me to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Interested in learning more about physiology? Check out the critical oxygen website for blogs, courses and coaching -https://www.criticaloxygen.com/ CHAPTERS Chapters 00:00 Introduction to VLaMax and the Critical Oxygen Podcast 08:06 Understanding Lactate and its Measurement 16:23 Introduction to VLaMax and its Definition 28:16 The Standard VLaMax Protocol 40:09 Measuring Lactate at Rest and After the Sprint 43:01 Determining VLaMax 45:23 Understanding VLaMax: Measurement and Interpretation 50:41 The Importance of Standardized Protocols for VLaMax Testing 56:37 The Relationship Between VLaMax, Power Output, and Fat-Free Mass 01:05:24 Exploring the Relationship Between VLaMax and Endurance Exercise 01:16:54 The Effects of Diet and Training on VLaMax 01:21:13 Optimizing Training and Performance with VLaMax Measurements KEYWORDS VLaMax, glycolysis, lactate, sprint test, ergometer, isokinetic mode, lactate measurements, maximal lactate production rate, measurement, interpretation, endurance athletes, Delta lactate, phosphogen contribution time, power output, fat-free mass, standardized protocols, sprinting, endurance exercise, substrate utilization

In this episode of the Critical Oxygen podcast, Dr. Andri Feldman and I discuss the importance of oxygen and how to measure oxygen dynamics in the muscle using near-infrared spectroscopy (NIRS) devices like Moxy Monitor. We explain the physiology of oxygen and its role in energy production through ATP synthesis. We also explore the different energy systems involved in exercise, including the phosphagen system, glycolytic system, and oxidative mitochondrial system. The conversation highlights the interconnectedness of these systems and the role of lactate as an intermediary. We then explore the principles of NIRS and how it measures oxygenation levels in the muscle. Overall, NIRS is a valuable tool for monitoring and optimizing training performance. TAKEAWAYS - Oxygen is crucial for energy production through ATP synthesis in the body. - The phosphagen, glycolytic, and mitochondrial oxidative phosphorylation systems are the three main energy systems involved in exercise. - Near-infrared spectroscopy (NIRS) devices like Moxy Monitor can measure oxygen dynamics in the muscle and provide insights into an athlete's performance. - Near-infrared spectroscopy (NIRS) measures oxygenation levels in muscles and can be used to determine steady state and critical power or even functional threshold power (FTP). - NIRS provides real-time feedback on oxygen supply and demand, allowing athletes to adjust their training intensity accordingly. Enjoy! Enjoying these podcasts, subscribe to get notified when new episodes are released. If you have a question or topic you want us to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Interested in learning more about physiology? Check out the critical oxygen website for blogs, courses and coaching -https://www.criticaloxygen.com/ CHAPTERS 00:00 Introduction 07:10 The Importance of Oxygen and Energy Production 19:31 The Three Energy Systems in Exercise 25:20 The Role of Lactate as an Intermediary 38:26 Measuring Oxygen Dynamics with NIRS 42:19 How NIRS Works 43:41 The Importance of Oxygenation and the Role of NIRS 45:08 Understanding Muscle Oxygenation and NIRS Measurements 46:03 Using NIRS to Measure Oxygen Supply and Demand 47:23 Interpreting NIRS Readings and Muscle Oxygenation Levels 48:20 The Relationship Between NIRS and Oxygen Delivery 51:22 The Significance of Steady State in Exercise Physiology 52:49 The Importance of Maximal Sustainable Exercise Rate 56:07 The Relationship Between Oxygenation and Lactate Production 59:44 Comparing NIRS and Lactate as Performance Metrics 01:04:19 Using NIRS to Determine Training Zones and Thresholds 01:08:04 The Benefits of NIRS for Training Optimization 01:19:24 Triangulating Data Sources for Informed Training Decisions KEYWORDS oxygen, near-infrared spectroscopy, NIRS, energy systems, ATP synthesis, phosphagen system, glycolytic system, oxidative mitochondrial system, lactate, near-infrared spectroscopy, NIRS, oxygenation, energy systems, lactate production, muscle fatigue, steady state, critical power, training intensity, monitoring, optimization

In this episode of Fast Physiology on the Critical Oxygen Podcast, Coach Dave Schell and I discuss the importance of cooling down and the purpose of recovery workouts. We debunk misconceptions about cooling down, such as the idea of flushing lactic acid, and explain that the goal of a cool down is to bring the body back to homeostasis as fast as possible. We also explore the benefits of recovery workouts and how they facilitate nutrient delivery to the muscles. We emphasize that there is no magic duration or intensity for a cool down or recovery workout, and it should be tailored to each individual's needs. TAKEAWAYS 1) The purpose of a cool down is to bring the body back to homeostasis and the resting state as quickly as possible. 2) A cool down helps facilitate the removal of waste products and the delivery of nutrients to the muscles. 3) Recovery workouts, such as recovery runs or rides, can be beneficial for facilitating nutrient delivery and aiding in muscle recovery. If you have a question or topic you want us to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Follow Dave on Instagram - https://www.instagram.com/kaizenendurance/ OR YouTube - https://www.youtube.com/@UCT5Cy95BiLIDQh4KS5bohhQ Interested in Gravel or Mountain Bike Coach? Head to Dave's website - https://www.kaizenendurance.coach/ Want to learn more physiology, check out my blog, and courses - https://www.criticaloxygen.com/ CHAPTERS 00:00 Introduction 00:58 The Importance of Cooling Down 02:24 Debunking Misconceptions About Cooling Down 09:31 Facilitating Nutrient Delivery and Muscle Recovery 13:19 The Purpose of Recovery Workouts 16:37 Tailoring Cool Down and Recovery Workouts 20:51 Conclusion KEYWORDS cooling down, recovery workout, misconceptions, homeostasis, nutrient delivery

In this episode of the Critical Oxygen Podcast, Dr. Kat Campbell and I discuss running volume, training load, and the importance of individualization in training. We discuss concepts of training volume, training load, progression, and the impact of intensity on running performance. We also talk about the use of acute to chronic workload ratio, the role of duration versus mileage, and the importance of understanding individual athlete needs and stressors. We also emphasize the need for a conservative approach to training, the role of RPE in guiding effort, and the challenges of ego and mindset in training. The discussion also touches on the philosophy of training, the importance of easy runs, and the impact of training load on long-term health and performance. More about Kat: Kat (otherwise known as Runwithkat_dpt on Instagram) is a physical therapist that specializes in working with runners as well as a certified running coach, and Certified NASM personal trainer. Kat strives to make a difference in runners’ lives by helping runners achieve goals they didn't think was once possible while keeping them healthy in the process. Kat believes in utilizing an individualized and holistic approach when working with runners. She is passionate about sharing her love for running to inspire others to feel confident to take on new challenges. Enjoying these podcasts? Subscribe to get notified when new episodes are released. If you have a question or topic you want us to address, leave a comment! Follow Phil on Instagram - https://www.instagram.com/criticalo2 Follow Laura on Instagram - https://www.instagram.com/runwithkat_dpt/ Check out her podcast - https://open.spotify.com/show/6uxvbNu8EvCacL5GFNqAzV?si=c53c6841b1ee4e52 Interested in learning more (courses, education, testing, etc)? Check out the critical oxygen website - https://www.criticaloxygen.com/ TAKEAWAYS 1) When individualizing training consider factors such as accumulated time on the feet, personal goals, past history, and other areas of life stress. 2) Using acute to chronic workload ratio can help to predict the chance of injury and promote adaptation. 3) For runners, a conservative approach to training, focusing on easy runs and recovery, is essential for long-term health and performance. With limited higher intensity work. 4) RPE (Rate of Perceived Exertion) is a valuable tool for guiding effort and ensuring appropriate training intensity. CHAPTERS 00:00 Introduction to Running Volume and Training Load 09:56 Understanding Training Volume and Load Management 15:10 The Role of Acute to Chronic Workload Ratio 29:40 The Importance of Individualized Training 40:16 The Role of RPE and Recovery in Training 47:17 Challenges of Ego and Mindset in Training 53:24 Philosophy of Training: Easy Runs and Long-Term Health 56:46 Managing Training Load and Volume for Success KEYWORDS running volume, training load, individualization, progression, intensity, acute to chronic workload ratio, duration, mileage, client needs, stressors, individualized training, volume, intensity, recovery, adaptation, conservative approach, RPE, ego, mindset, easy runs, training load, long-term health, performance