#108 The Best Type of Exercise for Longevity
Endurance athlete Brady Holmer and Rhonda Patrick, PhD, discuss a Nature Communications study. It shows vigorous exercise is 4-10x more potent than moderate for reducing mortality and chronic disease risk, challenging the long-standing 1:2 exercise intensity rule.
Deep Dive Analysis
19 Topic Outline
Challenging the 1:2 Exercise Intensity Rule
Origins and Flaws of Current Exercise Guidelines
Study Methodology: Wearable Accelerometers and Health Outcomes
Vigorous Activity's Potency for All-Cause Mortality
Vigorous Activity's Potency for Cardiovascular Health
Vigorous Activity's Potency for Type 2 Diabetes Prevention
Vigorous Activity's Potency for Cancer Mortality
Dramatic Differences: Vigorous vs. Light Physical Activity
Dose-Response Relationship of Exercise Intensity
Cardiovascular Adaptations to Vigorous Exercise
Metabolic and Mitochondrial Benefits of Vigorous Exercise
Vigorous Exercise and Cancer Cell Destruction
Hormonal and Muscle Fiber Recruitment Benefits
Vigorous Intermittent Lifestyle Physical Activity (VILPA)
Exercise Snacks: Structured Short Bursts of Activity
Implications for Public Health Guidelines and Wearable Tech
Vigorous Exercise for Special Populations: Older Adults and Women
Balancing Intensity and Recovery for Athletes
Importance of Physical Activity for Children's Health
9 Key Concepts
Metabolic Equivalent of Tasks (METs)
METs quantify the caloric expenditure of various activities, forming the basis of the long-standing 1:2 exercise intensity rule. This rule suggests that vigorous activity burns roughly twice as many calories as moderate activity, but this metric doesn't directly correlate with health outcomes like disease risk reduction.
Health Equivalence Ratio
This ratio determines how many minutes of light or moderate activity are needed to achieve the same health benefit as one minute of vigorous activity. The study used this to challenge the traditional 1:2 rule, revealing significantly higher ratios for various health outcomes.
Shear Stress
Shear stress is the friction of blood flow against the interior lining of arteries. Vigorous exercise increases blood flow, leading to stronger shear stress, which is a beneficial type of stress that causes endothelial cells to adapt, improving vascular function, flexibility, and resilience against atherosclerosis, and even killing circulating tumor cells.
Mitochondrial Biogenesis
This is the process of growing new mitochondria within muscle cells. Vigorous intensity exercise, by forcing muscles to work harder and produce energy without relying solely on mitochondria, signals proteins like PGC1-alpha to increase mitochondrial biogenesis, improving overall metabolism.
Circulating Tumor Cells (CTCs)
These are cancer cells that escape a primary tumor and enter circulation, playing a role in cancer metastasis and recurrence. Vigorous exercise generates shearing forces in the bloodstream that act as a death signal for these cells, which are primed to die and sensitive to mechanical forces.
Type 2 Muscle Fibers
Also known as fast-twitch muscle fibers, these are primarily activated during vigorous intensity activities. They are crucial for power and strength, and are the first to atrophy with age. Engaging these fibers through vigorous movement helps maintain strength, prevent falls, and improve glucose utilization.
Hormetic Response
This is a biological process where the body adapts positively to a low-dose stressor. Vigorous exercise, by causing temporary inflammation and oxidative stress, triggers a stronger anti-inflammatory response and other beneficial adaptations that last throughout the day, improving resilience against other life stressors and chronic diseases.
Vigorous Intermittent Lifestyle Physical Activity (VILPA)
VILPA refers to short, sometimes unstructured, everyday bursts of vigorous physical activity, typically 1-3 minutes in length, that elevate heart rate. Examples include sprinting to catch a bus or playing intensely with a pet. These activities, when accumulated, offer significant health benefits comparable to structured exercise.
Exercise Snacks
Exercise snacks are planned, short bursts of vigorous physical activity, such as a few minutes of air squats or sprints on a stationary bike, performed multiple times throughout the day. Unlike VILPA, they are structured and deliberate, offering significant physiological adaptations like improved VO2 max, especially for untrained individuals.
13 Questions Answered
The traditional rule states that one minute of vigorous exercise is equivalent to two minutes of moderate exercise. This rule originated from calculations of metabolic equivalents (METs) and calorie burn, not from direct measurements of long-term health outcomes like mortality or disease risk.
One minute of vigorous intensity physical activity is equivalent to about four minutes of moderate intensity activity for reducing all-cause mortality, meaning it is four times as potent.
One minute of vigorous intensity physical activity is equivalent to 7.8 minutes (almost eight minutes) of moderate intensity physical activity for reducing cardiovascular-related mortality.
One minute of vigorous intensity physical activity is equivalent to 9.4 minutes (almost ten times) of moderate intensity physical activity for reducing the risk of developing type 2 diabetes.
One minute of vigorous intensity physical activity is equivalent to 3.4 to 3.5 minutes of moderate intensity physical activity for reducing cancer mortality.
For most health outcomes, one minute of vigorous activity is equivalent to 53 to 94 minutes of light activity. For cancer mortality, it's 156 minutes of light activity, and light activity shows little to no dose-response relationship for risk reduction beyond a 10-15% cap.
Yes, vigorous exercise shows a linear dose-response relationship, with 30-40 minutes per day associated with 50% or more reduction in various health outcomes. Moderate activity also shows a linear dose-response up to about 50 minutes per day, after which benefits plateau.
Vigorous exercise increases blood flow and shear stress on artery linings, causing endothelial cells to adapt by secreting beneficial molecules like nitric oxide, improving vascular function, flexibility, and resistance to atherosclerosis. This stronger stimulus leads to greater adaptations than lower intensities.
Vigorous exercise causes muscle contractions and lactate production. Lactate acts as a signaling molecule, increasing GLUT4 transporters on muscle cell surfaces, which pull glucose from circulation into the muscle. This leads to improved insulin sensitivity and blood glucose regulation, with lasting effects.
Yes, VILPA (vigorous intermittent lifestyle physical activity) in short bursts (1-3 minutes) done multiple times a day can provide profound benefits. For example, 3.4 minutes of VILPA per day was associated with a 45% lower risk of major cardiovascular events and a 67% lower risk of heart failure in women.
Yes, planned exercise snacks (short, structured bouts of vigorous activity like sprints or bodyweight exercises) performed regularly can improve VO2 max by 2-3 milliliters per kilogram of oxygen in 6-8 weeks, comparable to traditional structured exercise training, especially for untrained individuals.
Yes, the study included adults up to age 79 who benefited massively from vigorous activity. Older adults can safely engage in vigorous exercise, often starting progressively, and it is crucial for maintaining cardiorespiratory fitness, preventing cardiac stiffening, and preserving muscle power to reduce fall risk.
No, women can safely and beneficially engage in HIIT. Concerns often stem from studies where women combined HIIT with severe caloric restriction, which can cause hormonal disruptions. When adequately fueled and listening to their bodies, women benefit from HIIT just as much as men.
32 Actionable Insights
1. Vigorous Exercise: 4-10x Potency
Prioritize vigorous intensity physical activity over moderate intensity, as it offers 4 to 10 times greater health benefits for reducing all-cause mortality, cardiovascular disease, type 2 diabetes, and cancer risk.
2. Boost Cardiovascular Health Vigorously
Engage in vigorous physical activity to achieve nearly 8 times the cardiovascular health benefits compared to moderate activity, significantly reducing the risk of cardiovascular-related mortality and major adverse cardiovascular events.
3. Vigorous Exercise Prevents Diabetes
Focus on vigorous physical activity for diabetes prevention, as it is almost 10 times more effective than moderate intensity activity in reducing the risk of developing type 2 diabetes.
4. Vigorous Movement Reduces Cancer
Incorporate vigorous physical activity to lower cancer mortality risk, as one minute of vigorous activity is equivalent to about 3.5 minutes of moderate activity.
5. Embrace VILPA for Health
Actively seek out and perform short, unstructured bursts of vigorous activity throughout your day (VILPAs), such as sprinting for a bus, carrying groceries up stairs, or playing intensely with pets or children, as these accumulate significant health benefits.
6. Aim for 9 Minutes VILPA Daily
Strive for at least 9 minutes per day of VILPAs (e.g., three 3-minute bursts) to achieve substantial reductions in cardiovascular-related, all-cause, and cancer-related mortality (50% and 40% respectively).
7. Aim for 3.4 Minutes VILPA Daily
Engage in at least 3.4 minutes per day of VILPAs to achieve significant cardiovascular benefits, including a 45% lower risk of major cardiovascular events and a 67% lower risk of heart failure in women.
8. Implement Planned Exercise Snacks
Integrate short, structured ’exercise snacks’ (micro-workouts) into your day, such as 30-45 second sprints on a bike or bodyweight exercises, to accumulate vigorous activity efficiently without needing to change clothes or shower.
9. Perform 3-Minute Air Squats
Use 3-minute air squats as an effective, equipment-free exercise snack to quickly elevate heart rate and contribute to vigorous activity goals.
10. Prioritize Moderate to Vigorous Activity
Aim for at least moderate, and preferably vigorous, physical activity to achieve meaningful health outcomes, as light activity alone offers limited and capped benefits for disease risk reduction.
11. Avoid Sedentary Behavior
Recognize that being sedentary is an independent risk factor for disease; any movement is better than none, but prioritize effort over just light activity.
12. Target 30-40 Mins Vigorous Daily
Engage in 30-40 minutes per day of vigorous exercise to achieve 50% or more reduction in risk for various health outcomes, including cardiovascular mortality and type 2 diabetes.
13. Limit Moderate Activity to 50 Mins
For moderate intensity activity, aim for up to 50 minutes per day, as benefits for risk reduction tend to plateau beyond this duration.
14. HIIT for Vascular Health
Incorporate high-intensity exercise (HIIT) to generate strong sheer stress on arteries, which is crucial for improving vascular function and endothelial adaptations, more so than prolonged low-intensity activity.
15. Vigorous Exercise Maintains VO2 Max
Actively engage in vigorous exercise, especially after age 30-40, to maintain or improve your cardiorespiratory fitness (VO2 max) and counteract its natural decline with age.
16. Vigorous Activity Boosts Glucose Regulation
Perform vigorous exercise to stimulate muscle contractions and lactate production, which in turn increases GLUT4 transporters for enhanced glucose uptake and improved insulin sensitivity.
17. Stimulate Mitochondrial Biogenesis Vigorously
Engage in vigorous exercise to signal PGC1-alpha and promote the growth of new, healthy mitochondria, improving overall metabolic function.
18. Trigger Anti-Inflammatory Response Vigorously
Utilize vigorous exercise to generate a hormetic stress response, leading to the production of anti-inflammatory cytokines like IL-10, which helps combat chronic inflammation.
19. Enhance Brain Health Vigorously
Perform vigorous exercise to increase lactate production, a signaling molecule that crosses the blood-brain barrier and boosts brain-derived neurotrophic factor (BDNF), supporting neuroplasticity and cognitive function.
20. Progressively Increase Vigorous Activity
For those new to vigorous exercise or older adults, start gradually and progressively increase intensity, for example, by beginning with interval walking or chair squats.
21. Older Adults: Embrace Vigorous Training
Older adults can safely and effectively perform vigorous exercise protocols, such as the Norwegian 4x4 (85% max heart rate), a couple of times per week to prevent cardiac stiffening and promote adaptation.
22. Women: Confidently Engage in HIIT
Women should confidently engage in high-intensity interval training and vigorous workouts, ensuring adequate fueling and listening to their bodies to avoid overtraining.
23. Balance Exercise with Life Stress
Integrate exercise smartly into your life by balancing intensity and volume with other stressors like family and work, to prevent burnout and ensure sustainable health benefits.
24. Follow 80-20 Training Rule
Athletes or individuals with high training volumes should consider an 80-20 split, where approximately 80% of weekly exercise sessions are easy and 20% are hard, to optimize performance and recovery.
25. Encourage Children’s Sports Participation
Get children involved in various sports (team or individual) to promote long-term physical health, academic performance, and overall brain function, prioritizing fun and exposure over intense competition.
26. Avoid Early Structured HIIT for Kids
Allow children to engage in natural physical activity and sports, but generally refrain from pushing structured interval training until they are older (elementary or junior high school age).
27. Break Up Sitting with Daily Walks
Even if highly active, incorporate daily walks (e.g., 30 minutes) to break up prolonged periods of sitting, which is beneficial for overall health.
28. Integrate Resistance Exercise Snacks
Utilize short bursts of resistance exercises, like pull-ups or kettlebell swings, throughout the workday as ’exercise snacks’ to build strength and combat sedentary behavior.
29. Leverage Wearable Device Gamification
Use wearable devices that gamify physical activity by tracking and rewarding vigorous efforts (e.g., ‘heart points’) to enhance motivation and adherence to exercise goals.
30. Download Free Training Guide
Access the updated, evidence-based ‘How to Train According to the Experts’ guide at howtotrainguide.com for protocols on muscle building, cardiorespiratory fitness, metabolic/cognitive health, and time-constrained routines.
31. Explore Creatine Resources
Visit foundmyfitness.com/topics and navigate to the creatine section for comprehensive resources on creatine supplementation, dosing protocols, and its impact on brain health.
32. Support Found My Fitness
Become a Found My Fitness Premium member at foundmyfitness.com/premium to support unbiased science communication and gain access to exclusive perks like a members-only podcast and live Q&A sessions.
5 Key Quotes
Not even the largest amounts of daily LPA or low intensity physical activity can elicit the health benefits of moderate or vigorous intensity.
Brady Holmer (quoting study authors)
Your body doesn't care if it's structured exercise or not. It just wants the movement.
Rhonda Patrick, PhD
A minute is not a minute is not a minute.
Brady Holmer
The problem with cortisol isn't the like little spikes that you're getting from like working out hard. The problem is like the chronic activation of a cortisol, like every single day with all the stress.
Rhonda Patrick, PhD
If you don't engage in the vigorous exercise, you're just not going to adapt, especially with regard to the cardiac, the cardiac, cardiac adaptations, the cardiovascular system, the heart just needs that extra stimulus.
Brady Holmer
3 Protocols
General Physical Activity Guidelines (Traditional)
Rhonda Patrick, PhD- Engage in 150 to 300 minutes of moderate intensity physical activity per week.
- Alternatively, engage in 75 to 150 minutes of vigorous intensity physical activity per week.
Norwegian 4x4 HIIT Protocol (for older adults)
Brady Holmer (referencing Dr. Ben Levine's work)- Perform four 4-minute intervals of vigorous exercise (e.g., cycling, running).
- Aim for 85% of maximum heart rate during intervals.
- Include 3 minutes of active recovery between each interval.
- Perform this protocol safely and effectively several times per week.
Athletic Training Intensity Split
Brady Holmer- Dedicate 80% of weekly exercise volume to easy, low-intensity sessions.
- Dedicate 20% of weekly exercise volume to hard, high-intensity sessions (1-2 per week).