#217 ‒ Exercise, VO2 max, and longevity | Mike Joyner, M.D.
Dr. Mike Joyner, a physician-researcher at Mayo Clinic, discusses exercise's profound impact on lifespan and healthspan. He details how exercise combats age-related decline, improves VO2 max, and influences key physiological systems, offering practical training advice for all fitness levels.
Deep Dive Analysis
19 Topic Outline
Mike Joyner's Background and Career Path
Why Exercise Increases Longevity and Reduces Mortality
The Power of Exercise vs. Nutrition in Health Outcomes
Defining and Improving Healthspan: The Centenarian Decathlon
Age-Related Decline in Strength and Activity
Impact of Inactivity: Lessons from Bed Rest Studies
Exercise Benefits on the Autonomic Nervous System
Understanding VO2 Max and its Link to All-Cause Mortality
The 'J-Curve' Hypothesis: Can You Over-Exercise?
Mitigating Age-Related VO2 Max Decline
Physiological Drivers of VO2 Max
Training Insights from Elite Athletes and Aerobic Efficiency
Health Benefits of Light Physical Activity
Mike Joyner's Personal Exercise Regimen
Strategies to Boost VO2 Max
Performance Enhancing Drugs in Sports
The Concept of an 'Exercise Pill'
Current Research: Hemoglobin Variants and Convalescent Plasma
Future of Physical Activity in American Society
8 Key Concepts
Autonomic Nervous System
This system controls your internal environment (homeostasis) and has two branches: sympathetic (fight or flight) and parasympathetic (rest and digest). Exercise helps tune up this system, improving its ability to regulate internal functions like blood pressure and heart rate.
Heart Rate Recovery (HRR)
HRR measures how quickly your heart rate returns to a lower level after maximal exercise. A faster recovery indicates better vagal tone (parasympathetic activity), which is protective against arrhythmias and sudden death.
VO2 Max
VO2 max is the maximum rate of oxygen consumption measured during incremental exercise. It is a key indicator of physical fitness and is strongly and inversely linked to all-cause mortality, meaning higher VO2 max correlates with lower risk of death.
METs (Metabolic Equivalents)
A MET is a unit representing your resting metabolic rate, equivalent to consuming 3.5 mL of oxygen per kilogram of body weight per minute. Exercise intensity and energy expenditure are often expressed in METs, with higher MET values indicating greater exertion.
J-Curve (Exercise & Longevity)
This hypothesis suggests that while moderate exercise significantly reduces mortality risk, excessive exercise might lead to a slight increase in risk, forming a 'J' shape. However, the evidence for this J-curve, especially at very high exercise volumes, is not consistently strong across all studies.
Oxygen Hemoglobin Dissociation Curve
This curve illustrates the relationship between the partial pressure of oxygen and hemoglobin's oxygen saturation. A 'right shift' means hemoglobin releases oxygen more easily to tissues, while a 'left shift' means it holds onto oxygen more tightly, which can be beneficial for oxygen uptake in the lungs at high altitudes.
Active Rest
Active rest refers to engaging in light physical activity on recovery days, rather than complete inactivity. The goal is not to achieve a significant training effect but to aid recovery, loosen muscles, and maintain some level of movement.
Poly Pill
A poly pill is a theoretical combination of low-dose medications (e.g., statins, blood pressure meds) in a single pill, designed to reduce multiple risk factors for cardiovascular disease. It is considered a potential public health strategy for those who cannot or will not exercise.
9 Questions Answered
Exercise positively influences multiple risk factors for cardiovascular disease and all-cause mortality, including blood pressure, diabetes, lipids, endothelial function, and autonomic nervous system activity. The combined effect of these improvements provides a synergistic benefit beyond the sum of individual risk factor reductions.
Exercise significantly improves healthspan by preserving physical function and reducing disability in old age. It helps maintain strength, stability, and cardiopulmonary capability, enabling individuals to perform daily activities and engage in desired physical pursuits later in life.
Exercise helps to 'tune up' the autonomic nervous system, improving the balance between its sympathetic and parasympathetic branches. This leads to better regulation of internal bodily functions, such as lower resting heart rate, improved heart rate recovery, and enhanced heart rate variability.
VO2 max is measured by having a person exercise on a treadmill or bike with a mask or mouthpiece to collect and analyze inhaled and exhaled air. It indicates the maximum amount of oxygen the body can consume during intense exercise, serving as a robust marker of cardiorespiratory fitness and a strong predictor of all-cause mortality.
While some studies suggest a J-curve where very high exercise volumes might slightly increase mortality risk, the evidence is not particularly strong or consistent. Elite athletes who train extensively often show the lowest all-cause mortality, and any potential increased risk, such as for atrial fibrillation, is generally outweighed by overall health benefits and is not associated with fatal arrhythmias.
In non-training individuals, VO2 max typically declines by about 10% per decade starting in their 30s. For those who continue to train hard, the rate of decline can be reduced by about half, to 5-6% per decade, allowing them to maintain significantly higher fitness levels into older age.
VO2 max is primarily driven by the body's ability to deliver oxygen to the muscles, which is largely determined by cardiac output (heart rate multiplied by stroke volume). While gas exchange in the lungs and oxygen extraction by muscles also play roles, the capacity of the heart to pump blood is the most significant factor.
Even light physical activity, such as less than brisk walking, gardening, or taking stairs, provides substantial health benefits. The biggest health gains are often seen from the first 10-15 minutes of activity per day, contributing to improved insulin sensitivity, weight management, and better endothelial and autonomic function.
Current 'exercise mimetics' primarily focus on increasing mitochondrial biosynthesis, but exercise offers multi-factorial benefits beyond just mitochondria, such as improving the autonomic nervous system, blood pressure, and blood vessel health. Therefore, a single 'exercise pill' is unlikely to fully capture the broad range of benefits that physical activity provides.
25 Actionable Insights
1. Prioritize Exercise for Longevity
Recognize exercise as the single most impactful factor for extending both lifespan and healthspan, surpassing nutrition and medication in its potential to reduce all-cause mortality and improve quality of life.
2. Define Your Healthspan Goals
Create a ‘Centenarian Decathlon’ by identifying specific physical activities and daily living tasks you want to perform in your last decade (e.g., walking 3 miles in an hour, getting off the floor with one hand) and train deliberately to offset age-related decline.
3. Achieve Elite VO2 Max
Strive for a VO2 max in the top 2.5% for your age group, as this level of fitness is associated with the lowest all-cause mortality risk, a five-fold reduction compared to the least fit individuals.
4. Build VO2 Max for Future Decline
Aim for the highest possible VO2 max in your 40s and 50s to create a larger reserve, buffering the inevitable age-related decline (which can be reduced from 10% to 5-6% per decade with consistent training) and maintaining functional capacity into later life.
5. Incorporate Strength & Agility Training
As you age, especially from your forties and fifties, add strength, circuit, and agility training to your routine to combat the decline in skeletal muscle strength and frailty, which is crucial for preventing falls and maintaining independence.
6. Avoid Inactivity at All Costs
Actively avoid inactivity, as even short periods of bed rest can cause significant physiological decline equivalent to decades of aging. Engage in any form of physical activity, from low-grade movement to intentional workouts.
7. Boost VO2 Max with 4x4 Intervals
Implement a high-intensity interval training protocol of four minutes of all-out effort (e.g., on a bike or running) followed by four minutes of complete rest or very light recovery, repeated four times, to efficiently increase your VO2 max.
8. Adopt Polarized Training
Structure your exercise regimen with a polarized approach, alternating between ‘hard’ days of intense, structured workouts and ’easy’ days focused on active recovery to promote recuperation and loosen muscles.
9. Train to Train First
If you are previously untrained or older (60-70 years), dedicate 3-6 months to ‘pre-training’ at a moderate intensity (e.g., 80% of time at conversational pace) to build a foundational fitness level before introducing hard interval sessions.
10. Limit Hard Training Sessions
To prevent orthopedic issues, fatigue, and other load management problems, limit your hard training sessions to no more than five or six every two weeks, allowing adequate recovery.
11. Pace Intervals Strategically
When performing intervals, start at a sustainable pace where initial discomfort is minimal. Aim for consistent effort, with the most suffering concentrated in the last 90 seconds, and finish without needing to bend over, indicating optimal exertion without overdoing it.
12. Manage Suffering for Performance
During intense interval training, learn to ‘manage your suffering’ by maintaining rhythm, tempo, and form even as discomfort increases, pushing your limits while staying relaxed.
13. Engage in Daily Light Activity
Incorporate at least 10-15 minutes of light physical activity daily, such as purposeful walking, gardening, or taking the stairs, as this provides substantial health benefits like improved insulin sensitivity and better vascular function.
14. Incorporate Jump Roping
Use a jump rope as a versatile exercise, even when traveling, to improve cardio, coordination, and foot reactivity, which are important for preventing falls.
15. Utilize Bodyweight Exercises
Perform simple bodyweight exercises like pushups, planks, and pull-ups to maintain strength and functional fitness, which are accessible and effective.
16. Focus Training on Cardiac Output
Direct your training efforts towards improving cardiac output (heart rate multiplied by stroke volume), as it is the primary physiological driver of oxygen delivery and overall VO2 max.
17. Use RPE for Easy Days
On easy training days and for general physical activity, rely on your Rating of Perceived Exertion (RPE) rather than strictly tracking metrics like heart rate recovery or variability, focusing on the overall feeling of effort and recovery.
18. Ensure Exercise Accountability
Implement strategies for accountability in your exercise regimen, such as training with a partner, using a device, keeping a diary, or simply tracking your progress, to maintain consistency and motivation.
19. Example Hard Day Workout
For a hard day, perform a circuit of strength exercises (e.g., 25 squat thrusts, 1 minute jump rope, static wall sit to failure, drop sets for major muscle groups) followed by intense cycling intervals (e.g., 8x3-minute ladders with increasing watts, no rest between ladder steps).
20. Example Easy Day Workout
For an easy day, engage in 30-40 minutes of light cycling or rowing, focusing on active rest to promote recovery and loosen muscles, rather than aiming for a significant training effect.
21. Target 30-31 VO2 Max in 80s
Set a specific long-term goal to maintain a VO2 max of 30-31 mL/kg/min into your 80s, which is a level that ensures you can perform virtually any reasonable activity without limitation.
22. Consider Poly Pill if Unable to Exercise
For individuals who are unwilling or unable to exercise, consider a ‘poly pill’ strategy (e.g., low-dose statins, blood pressure medications, metformin) as a potential public health approach to reduce risk factors, though exercise remains the preferred method.
23. Donate Convalescent Plasma
If you have recovered from COVID-19 (especially if vaccinated and had a breakthrough infection), consider donating convalescent plasma within 2-3 weeks of recovery (and up to 3-6 months) to help immune-suppressed patients.
24. Support Open Gym Initiatives
Advocate for or participate in a ’national open gym movement’ to provide accessible facilities and opportunities for unstructured play and physical activity for children and communities, addressing the decline in such opportunities.
25. Walk at Lunch in the Workplace
Utilize available spaces in your workplace, such as long hallways, to walk for 30-40 minutes at lunchtime with colleagues. This provides physical activity, social engagement, and can improve productivity.
6 Key Quotes
If the furnace is hot enough, you can burn anything, even Big Macs.
Mike Joyner
The idea, you know, is to live a long time and then die quickly with minimal disability.
Mike Joyner
Three weeks of bed rest, you know, caused losses of physiological function associated with 30 years of aging.
Mike Joyner
You cannot extract what has not been delivered.
Mike Joyner
Manage your suffering.
Mike Joyner
The goal was to not lose your form and not lose your tempo.
Mike Joyner
2 Protocols
Mike Joyner's Hard Day Exercise Regimen
Mike Joyner- Warm up for 10-15 minutes on a stationary bike or rowing machine.
- Perform a circuit of strength exercises (e.g., 25 squat thrusts, 1 minute jump rope, static wall sit to failure).
- Follow with drop sets for major muscle groups: incline flies, leg extensions, pull-ups/lat pull-downs, military press, push-ups, bar dips, upright rows, alternating arms and legs, with no rest between drop sets.
- Immediately after the strength circuit, perform interval training on the bike: 8 sets of 3-minute ladders (e.g., 30 seconds at 100W, 30s at 150W, 30s at 200W, 30s at 250W, 30s at 300W, 30s at 350W), with no rest between ladders (recovery is the descending wattage).
VO2 Max Boosting Interval Training (4x4 Protocol)
Peter Attia- Select an exercise modality like cycling on an incline or running.
- Perform 4 minutes of high-intensity effort at a pace that feels like 'all out' but is sustainable for the entire 4 minutes (e.g., 5k race pace or slightly faster). The suffering should be disproportionately in the last 90 seconds.
- Follow with 4 minutes of active recovery (e.g., rolling back to the start line on a bike, light jogging or walking for runners).
- Repeat this 4-minute on, 4-minute off cycle for a total of 4 rounds.