What is the quickest way to improve endurance according to Dr. Andy Galpin?

The quickest way to improve endurance is by improving mechanical efficiency, starting with breathing techniques and posture. Nasal breathing can often serve as a 'cheat code' to immediately improve mechanics and efficiency.

What are 'exercise snacks' and how can they improve fitness?

Exercise snacks are short bouts (e.g., 20 seconds) of all-out exertion, like running stairs, repeated a few times a day. Studies show they can significantly improve cardiorespiratory fitness (V2 Max), cognitive benefits, and post-meal glucose control.

How does the body actually lose fat?

The body primarily loses fat through respiration. When fats (chains of carbon) are metabolized for energy, the carbon is released and combines with oxygen to form CO2, which is then exhaled.

Can I lose more fat by simply exhaling more?

Technically, yes, since fat is exhaled as CO2. However, simply hyperventilating is unsustainable, causes anxiety, and doesn't lead to a net increase in carbon output over the day. Increased exhalation for fat loss is most effectively achieved through sustained physical activity that increases energy demand.

Does training fasted lead to more fat loss?

Under normal circumstances, training fasted is irrelevant for net fat loss over time. While a higher percentage of fuel might come from fat during low-intensity fasted exercise, total caloric expenditure is low. High-intensity exercise burning carbohydrates can lead to fat loss by signaling the body to bias fat-burning during recovery to replenish carbohydrate stores.

What is metabolic flexibility and how can I assess it?

Metabolic flexibility is the ability to optimally use whatever fuel (fat or carbohydrates) is best suited for the current activity. It can be assessed by observing stable energy levels throughout the day, low fasting blood glucose (ideally <85 mg/dL), and the ability to perform standard workouts fasted without significant performance drop.

What is the 'insulin glucose double whammy' and how can it be avoided?

This phenomenon occurs when ingesting too many fast carbohydrates right before intense exercise. Both insulin and muscles try to pull glucose from the blood simultaneously, leading to a blood sugar crash. It can be avoided by practicing race-day nutrition strategies during training and being cautious with pre-exercise fast carbohydrate intake.

Is lactate a waste product that causes fatigue?

No, lactate is not the primary cause of fatigue; it's actually an acid buffer and a valuable fuel source. It helps spare muscles from acidity build-up from ATP hydrolysis and can be transported to other tissues (heart, liver) or converted back to glucose for energy.

What is muscular endurance and how should it be trained?

Muscular endurance is the ability of a local muscle group to repeat a small effort (e.g., 5-50 repetitions) without burning out. It's trained by taking muscles close to failure with light loads, which increases capillarization (blood flow) and acid buffering capacity. It can be done frequently due to low muscle soreness.

How should one train for anaerobic capacity?

Anaerobic capacity training involves high-intensity, total-body movements (e.g., assault bike, hill sprints) for seconds to a few minutes, focusing on maximal effort. Protocols like 30 seconds on, 30 seconds off, for 4+ rounds, 2-3 times per week are effective. Rest periods should allow for recovery into nasal-only breathing.

How can one incorporate long duration endurance training without traditional running or cycling?

Creative circuit training can be used, combining various low-load bodyweight or machine exercises (e.g., farmer's carries, planks, bodyweight squats, rower, treadmill, bike rotations) for 20-30 minutes minimum. This maintains a steady heart rate while avoiding boredom if traditional cardio is disliked.

What determines when to stop an endurance exercise?

A key marker for stopping endurance exercise is technical breakdown. This indicates that posture, breathing mechanics, or movement efficiency can no longer be maintained, signaling that the body is reaching its limits and further exertion can be counterproductive or lead to injury.

What is a balanced endurance training program for overall fitness?

A well-rounded program incorporates 60-70% moderate-intensity 'tempo' work (tissue tolerance, skill practice), 10% short, high-intensity bursts (20-30 seconds, speed, waste recovery), and the remainder on longer, maximal aerobic capacity efforts (5-15 minutes, repeated endurance). This covers all nine adaptations for long-term health and performance.

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Dr. Andy Galpin: How to Build Physical Endurance & Lose Fat | Huberman Lab Guest Series

Andrew Huberman

Science & Technology7 min read229 min video

Feb 1, 2023|5,474,923 views|44,755|1,690

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TL;DR

Revolutionize endurance and fat loss through precise training, fueling, and fatigue management strategies.

Key Insights

Endurance involves fatigue management and fuel utilization, encompassing various types: muscular endurance, anaerobic capacity, maximum aerobic output, and long-duration endurance.

Fat loss is fundamentally about carbon balance: ingesting less carbon (calories) or expelling more carbon (through respiration). Exercise increases exhalation, promoting fat loss.

Breathing mechanics, especially nasal breathing and proper posture, significantly enhance endurance by improving efficiency and managing CO2.

Training across the full spectrum—short-burst high-intensity efforts (exercise snacks) and steady-state long-duration training—is crucial for maximizing fitness, longevity, and aesthetics.

Metabolic flexibility, the body's ability to efficiently use carbohydrates or fats as fuel, is key for sustained energy and optimal health, rather than just maximizing fat burning.

Specific training protocols target different endurance adaptations: high reps/light load for muscular endurance, intense short bursts for anaerobic capacity, and longer, hard efforts for maximal aerobic output.

THE MULTIFACETED NATURE OF ENDURANCE

Endurance is far more complex than merely sustaining activity for extended periods. It encompasses an individual's capacity to manage fatigue signals and efficiently utilize fuel sources. This broad definition includes daily energy levels, localized muscular endurance (e.g., repeating small efforts without muscle burning), maximum anaerobic capacity (e.g., intense 20-80 second bursts like paddling for a wave), maximum aerobic capacity (e.g., 5-15 minute sustained high output like a mile run), sustained positional endurance (e.g., holding posture), and long-duration endurance (e.g., a long hike). Understanding these distinct facets is crucial for tailoring effective training protocols.

FATIGUE MANAGEMENT AND FUELING STRATEGIES

At its core, endurance boils down to two critical factors: fatigue management and fueling. All forms of endurance training will eventually encounter limitations in either the body's ability to cope with fatigue signals or its capacity to supply sufficient energy. Often, what appears to be a fueling issue is actually a fatigue management challenge, or vice versa. A holistic approach to health and performance necessitates the mastery of both, irrespective of whether one is a high-performance athlete or engaging in general public fitness.

MECHANICAL EFFICIENCY: THE ENDURANCE GAME CHANGER

The quickest and most exponential way to boost endurance is by improving mechanical efficiency, primarily through proper breathing and posture. Unlike strength training, where minor mechanical leaks might be overcome by sheer force, endurance activities amplify the consequences of inefficiency over time, leading to rapid energy drain. Nasal breathing, as a foundational technique, inherently corrects many breathing mechanics issues and should be prioritized. Maintaining proper posture, whether running, cycling, or lifting, also dramatically reduces energy waste and enhances sustained performance.

THE PARADIGM OF HIGH-INTENSITY VERSUS STEADY-STATE TRAINING

An enduring misconception is that one must choose between long-duration steady-state cardio for fat loss or high-intensity interval training (HIIT) for quick results. The reality is that both ends of the training spectrum, and indeed the intermediate ranges, offer unique benefits and are essential for maximizing overall fitness, longevity, and aesthetics. Exclusive reliance on one type often leaves significant adaptations on the table. Integrating a full spectrum of training modalities, from 'exercise snacks' to sustained moderate efforts, yields the most comprehensive improvements.

EXERCISE SNACKS: BRIEF, POTENT BURSTS OF ACTIVITY

Short, maximal exertion bouts, known as 'exercise snacks,' offer significant improvements in cardiorespiratory fitness (VO2 Max) and cognitive function with minimal time investment. Studies show that even 20-second all-out efforts, repeated a few times a day (e.g., sprinting up stairs), can yield noticeable benefits. The key is maximal exertion, not the specific mode, ensuring the heart rate rises quickly. These 'snacks' are convenient and can be integrated into daily routines without requiring gym access or extensive warm-ups, providing a powerful tool for ubiquitous fitness enhancement.

FAT LOSS AS CARBON EXCHANGE: THE RESPIRATORY ROUTE

Fat loss fundamentally boils down to a 'carbon in, carbon out' equation. Caloric energy, whether from carbohydrates or fats, is essentially stored carbon. The body metabolizes these carbon chains for energy, releasing carbon molecules that must be expelled. Respiration (exhaling carbon dioxide, CO2) is the primary mechanism by which the body removes these carbons, thus leading to fat loss. When in a caloric deficit, the body mobilizes stored fat, breaks it down, and oxidizes the carbons, which are then exhaled as CO2. Increased respiration rate during exercise directly facilitates this process.

THE INTERPLAY OF CARBOHYDRATE AND FAT METABOLISM

The body primarily uses phosphocreatine for immediate bursts (0-20 seconds), followed by carbohydrates through anaerobic and then aerobic glycolysis for sustained efforts. Fat metabolism, while yielding vast energy, is slower, making it less suitable for high-intensity, rapid demands. While lower intensity exercise burns a higher percentage of fat, higher intensity exercise, which depletes carbohydrate stores, can indirectly lead to greater fat loss overall by shifting the body's post-exercise fuel preference towards fat for general energy needs and replenishment. Fasted training, while not essential for fat loss, can be a tool for enhancing fat utilization.

MITOCHONDRIA AND METABOLIC FLEXIBILITY

Efficient energy production, particularly for endurance, heavily relies on the mitochondria, the 'powerhouses' of the cell where aerobic metabolism occurs. Carbohydrate metabolism begins anaerobically in the cytoplasm and is completed aerobically in the mitochondria. Fat metabolism is exclusively aerobic and thus mitochondria-dependent. Metabolic flexibility refers to the body's ability to seamlessly switch between carbohydrate and fat as primary fuel sources depending on demand. Optimizing this flexibility, rather than solely maximizing fat utilization, leads to better performance and sustained energy throughout the day.

UNDERSTANDING AND IMPROVING METABOLIC FLEXIBILITY

Assessing metabolic flexibility involves evaluating energy regulation, blood glucose levels, and exercise performance in different states (e.g., fasted vs. fueled). Signs of poor carbohydrate utilization include energy crashes after carb-rich meals or needing caffeine for fasted training. To improve fat utilization (fat adaptation), incorporating some fasted training or fat intake before moderate-intensity workouts can be beneficial. To enhance carbohydrate utilization, engaging in higher intensity training with pre-workout carbohydrate intake helps. Consistent training across intensities and balanced nutrition are key.

TRAINING FOR MUSCULAR ENDURANCE: LOCALIZED FATIGUE MANAGEMENT

Muscular endurance focuses on a local muscle's ability to repeat efforts (e.g., 5-50 repetitions). The limiting factors are typically acid buildup (pH drop) and waste product clearance, not fuel depletion. Training for muscular endurance involves specific exercises (e.g., planks, push-ups, wall sits) with light loads and high repetitions, pushing close to failure. This stimulates capillarization (increased capillary density) around muscles, improving nutrient exchange and waste removal (e.g., CO2 and acid). Such training can be performed frequently (3-4 times/week) with light soreness and progressive overload by adding reps or time.

ANAEROBIC CAPACITY: HIGH-DEMAND, HIGH-WASTE

Anaerobic capacity refers to the total work an individual can perform in high-intensity efforts lasting seconds to a few minutes (e.g., sprints, HIIT). This training induces significant acid buildup and challenges oxygen transport and utilization, as multiple muscle groups dump waste into the systemic circulation. Specificity is key: train the movements and intensities desired. Recommend using safe, total-body movements with low eccentric loads (e.g., assault bike, rower, uphill sprints). Protocols often involve 30-second on/30-second off for 4+ rounds, 2-3 times per week, with adequate rest between rounds to ensure maximal effort and quality.

MAXIMUM AEROBIC OUTPUT: SUSTAINED HIGH EFFORT

Maximal aerobic output (or capacity) involves sustained, high-intensity efforts lasting 5 to 15 minutes (e.g., a one-mile race). While waste product clearance remains critical, oxygen demand and delivery become increasingly prominent limiting factors. Training should involve specific, continuous movements without interruptions (e.g., running, cycling, swimming). One to two times per week of maximal efforts, like a mile test or repeats, is effective. This high-intensity work should be supplemented with 40% of total training time dedicated to lower-intensity support work (above conversation pace but below maximal effort).

PROGRESSION AND RECOVERY IN ENDURANCE TRAINING

Progression in endurance training involves gradually increasing work (e.g., adding reps, time, distance, or rounds) or intensity (covering more distance in the same time). For high-intensity efforts, prioritizing quality over sheer volume is crucial. Incorporating sufficient rest and recovery, including nasal-only breathing after intense bouts, is vital to prevent overtraining and ensure endocrine and sleep health. Varying work-to-rest ratios for different types of high-intensity training can target specific adaptations, such as power production versus waste buffering, thereby creating a well-rounded endurance system.

Mentioned in This Episode

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●People Referenced

Endurance Training & Fat Loss Cheat Sheet

Practical takeaways from this episode

Do This

Improve mechanical efficiency (breathing, posture, movement) for quick endurance gains.

Prioritize nasal breathing during lower intensity exercise for efficiency.

Incorporate 'exercise snacks' (20-second all-out bursts) multiple times a day for cardiorespiratory fitness and cognitive benefits.

Train across the full spectrum of intensity, balancing steady-state with high-intensity interval training (HIIT).

Focus on 'carbon in, carbon out' for fat loss – achieve a caloric deficit through either reduced intake or increased expenditure.

Enhance fat utilization by doing some exercise in a pre-fat ingested state or through fasted training (if preferred).

Improve carbohydrate utilization by training at higher intensity with pre-workout carbohydrates.

Train muscular endurance by repeatedly taking muscles close to failure (e.g., bodyweight exercises like push-ups, planks, wall sits) to increase capillarization and acid buffering.

For anaerobic capacity, choose total body movements with minimal eccentric load (e.g., assault bike, rower, uphill sprints). Aim for 5-6 minutes of all-out effort per week, split into 20-60 second bouts with sufficient rest.

For maximal aerobic capacity (5-15 minute maximum intensity), perform exercises you can maintain without stopping, such as timed runs or rows. Include additional 30-40% lower intensity support work.

For long-duration endurance, aim for at least 20-30 minutes of steady-state exercise once a week, or up to 60-120 minutes with a weighted vest or circuit training. Focus on tissue tolerance, breathing mechanics, and intercostal/diaphragm training.

Ensure adequate protein intake and combine carbohydrates with fiber/protein to stabilize blood glucose and prevent 'carb crashes'.

Avoid This

Don't focus solely on one type of training (e.g., only steady state or only HIIT) for overall endurance.

Do not attempt to 'force exhale' dramatically to increase fat loss, as this can lead to hyperventilation, anxiety, and is unsustainable for net carbon output.

Don't worry about increasing lung capacity to 'offload more CO2' as your body will naturally regulate cardiac output to meet energetic demands efficiently.

Do not solely rely on 'burning fat' during exercise to achieve fat loss; total energy deficit over time is the key.

Do not assume that training fasted is crucial for fat loss or fat adaptation; it's an option, not a requirement.

Avoid heavy eccentric loads during high-intensity anaerobic training if not highly skilled/comfortable with the movement to prevent injury.

Do not solely rely on long-duration steady-state training for endurance; combine with higher intensity work for optimal benefits.

Don't neglect proper technique during endurance training; technical breakdown is a key marker of fatigue and can lead to inefficiency or injury.

Common Questions

Endurance training primarily improves fatigue management and fueling efficiency. This means the body gets better at dealing with the signals of fatigue and optimizing its energy production from various fuel sources.

Topics

Endurance Training Health & Longevity Human Performance Metabolic Flexibility Fat Loss Breathing Techniques Exercise Protocols Aerobic Capacity Cardiovascular Fitness Muscle Endurance Anaerobic Capacity Fuel Utilization

Mentioned in this video

People

Andrew Huberman

Professor of Neurobiology and Ophthalmology at Stanford School of Medicine and host of the Huberman Lab podcast.

Marty Gibala

Canadian scientist who has conducted extensive research on high-intensity interval training (HIIT) and its benefits for V2 Max improvement.

Brian McKenzie

Founder of Shift Adapt, credited for developing the 'gear system' for breathing during exercise, a concept adopted by Dr. Galpin.

Andy Galpin

Expert guest on the podcast, professor at Cal State Fullerton, who discusses endurance, fat loss, and exercise protocols.

Kenny Kane

A mutual friend and skilled trainer who taught Dr. Galpin a unique 2-minute interval training protocol.

Companies

LMNT

An electrolyte drink containing optimal ratios of sodium, magnesium, and potassium for cellular and mental/physical performance, with no sugar.

Levels

A program that provides real-time blood glucose feedback using a continuous glucose monitor to help understand how diet and activity affect health.

Momentous

A supplement company known for high-quality, single-ingredient formulations, which sponsors the Huberman Lab podcast.

Athletic Greens

A vitamin, mineral, probiotic, and adaptogen drink that helps meet foundational nutritional needs and aids in stress recovery.

InsideTracker

A personalized nutrition platform that analyzes blood and DNA data to provide insights and recommendations for health goals.

Shift Adapt

Brian McKenzie's company that developed the 'gear system' for breathing.

Organizations

Cal State Fullerton

The institution where Dr. Andy Galpin holds his teaching and research roles.

Products

Continuous Glucose Monitor

A device used by Levels to give real-time feedback on blood glucose levels.

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