#014 Sauna Use and Building Resilience to Stress with Dr. Rhonda Patrick
Rhonda discusses the extensive benefits of heat stress from sauna use, covering improved longevity, athletic and cognitive performance, mood, and detoxification of compounds like BPA. She also provides practical guidance on sauna types, duration, and frequency.
Deep Dive Analysis
16 Topic Outline
Introduction to Heat Stress and Sauna Benefits
Heat Stress for Resilience to Aging: Hormetic Stress
Mechanisms of Heat Shock Proteins (HSPs) and Longevity
The FOXO3 Longevity Gene and Stress Resistance
Cardiovascular Benefits of Sauna Use Mimicking Exercise
Heat Stress and Enhanced Athletic Endurance (Hyperthermic Conditioning)
Sauna's Effects on Muscle Atrophy and Regrowth
Mechanisms for Muscle Benefits: HSPs, Growth Hormone, Insulin Sensitivity
Profound Effects of Heat Stress on Brain Function and Mood
Detoxification Through Sweat: BPA, PCBs, Phthalates, and Heavy Metals
Importance of Electrolyte Replenishment After Sweating
Differences Between Dry, Wet, and Infrared Saunas
Optimal Sauna Duration, Frequency, and Timing
Sauna Use During Muscle Injury
Benefits from Other Heat Stress Methods: Steam Rooms, Hot Baths, Hot Yoga
Sauna Safety Precautions
5 Key Concepts
Hormetic Stress
Short-term stress that strengthens the body's cellular response mechanisms, leading to a reduction in long-term chronic stress and promoting longevity. Examples include exercise, heat stress from sauna, cold stress, and fasting.
Heat Shock Proteins (HSPs)
Proteins activated by heat stress and exercise that are crucial for maintaining proper protein structure, repairing damaged proteins, and preventing protein aggregation. Increased HSP expression is linked to protection against neurodegenerative diseases and human longevity, as humans produce less HSPs with age.
FOXO3 Gene
Referred to as the 'longevity gene,' FOXO3 is robustly activated by heat stress and exercise. It activates a plethora of other genes responsible for stress resistance, including those involved in DNA repair, scavenging oxidative damage, enhancing autophagy (clearing damaged cells), improving immune function, and promoting stem cell growth.
Hyperthermic Conditioning
The physiological adaptations that occur with repeated exposure to heat, also known as heat acclimation, which can enhance athletic endurance. This occurs by increasing plasma volume and blood flow to the heart (reducing cardiovascular strain), increasing blood flow to skeletal muscles, and improving thermoregulatory mechanisms to cool the body quicker.
Dynorphin Pathway
An endogenous opioid pathway activated by heat stress (and intense exercise) that causes a dysphoric feeling and helps cool the body. Its activation leads to an increase and sensitization of mu opioid receptors in the brain, making the body more sensitive to feel-good beta-endorphins and providing lasting mood benefits.
10 Questions Answered
Hormetic stress is short-term stress that strengthens cellular response mechanisms, promoting longevity by enhancing stress response pathways and defense mechanisms. Examples include exercise, heat stress, cold stress, and fasting.
Sauna use can mimic cardiovascular exercise by increasing heart rate and improving blood pressure, endothelial function, and left ventricular function, leading to a lower risk of fatal cardiovascular disease.
Heat stress enhances endurance by increasing plasma volume and blood flow to the heart and skeletal muscles, and by improving thermoregulatory mechanisms, allowing the body to cool itself quicker and sustain performance longer.
Yes, heat stress from the sauna can stave off muscle atrophy and improve muscle regrowth after disuse by robustly activating heat shock proteins, increasing growth hormone, and enhancing insulin sensitivity in muscle tissue.
Sauna use increases brain-derived neurotrophic factor (BDNF) for new brain cell growth, norepinephrine for focus and mood, and causes a massive release of beta-endorphins. It also sensitizes mu opioid receptors through the dynorphin pathway, leading to lasting mood improvements and better stress handling.
Yes, sweating induced by sauna use can help excrete xenobiotics like BPA, PCBs, and phthalates, as well as heavy metals such as arsenic, cadmium, lead, and mercury.
Dry and wet saunas heat the air, which then transfers heat to the body, with wet saunas adding steam. Infrared saunas use thermal radiation to heat the body directly without needing to warm the surrounding air as much.
For a typical hot dry or wet sauna (170-180°F), a duration of 20-25 minutes is beneficial. Frequency-wise, using it 4-7 times per week is associated with greater reductions in all-cause and cardiovascular mortality compared to 2-3 times per week.
While not directly compared in studies, steam rooms, hot baths, and hot yoga are forms of heat stress that likely activate many of the same stress response pathways as the sauna, though the robustness of effects may vary.
It is critical to never drink alcohol before or during sauna use due to risks of severe dehydration, hypotension, arrhythmia, and embolic stroke. Individuals with medical conditions or who are pregnant should consult a physician.
15 Actionable Insights
1. Optimal Sauna Protocol
For a dry or wet sauna heated to 170-180°F (77-82°C), aim for 20-25 minutes per session, four to seven times per week, to achieve maximum benefits for longevity and cardiovascular health.
2. Enhance Stress Resilience
Regular sauna use can enhance your brain’s ability to deal with stress by activating the dynorphin pathway, which in turn increases and sensitizes mu opioid receptors, leading to lasting positive effects from beta-endorphins.
3. Boost Brain Cell Growth
Utilize heat stress (sauna) to increase brain-derived neurotrophic factor (BDNF) expression, which promotes the growth of new brain cells and enhances the survival of existing neurons, improving overall brain function.
4. Improve Focus and Mood
Engage in sauna use to increase the release of norepinephrine in the brain, which enhances focus, attention, and mood, and also boosts beta-endorphins for feelings of well-being.
5. Accelerate Muscle Regrowth
Use heat stress (sauna) for 30-60 minutes after muscle disuse to accelerate muscle regrowth by 20-32%, as it activates heat shock proteins, growth hormone, and increases insulin sensitivity.
6. Enhance Athletic Endurance
Incorporate a 30-minute sauna session two times a week for three weeks after a workout to enhance athletic endurance, as heat acclimation increases plasma volume, blood flow, and improves thermoregulation.
7. Combine Sauna & Strength Training
Combine regular sauna use with strength training, especially when aging, to potentially stave off muscle atrophy and promote overall muscle health.
8. Sweat to Excrete BPA
Induce sweating through sauna use or exercise to help your body excrete Bisphenol A (BPA), a ubiquitous chemical found in plastics and receipts linked to various health issues.
9. Sweat to Excrete PCBs & Phthalates
Engage in activities that induce sweating, such as sauna use or exercise, to help clear certain polychlorinated biphenols (PCBs) and phthalates from your body, as they have been shown to be excreted through perspiration.
10. Sweat to Excrete Heavy Metals
Actively induce sweating through sauna use or exercise to help your body excrete heavy metals like arsenic, cadmium, lead, and mercury.
11. Replenish Post-Sauna Electrolytes
After intense sauna sessions or excessive sweating, drink plenty of water and replenish electrolytes using coconut water or a blended smoothie of spinach, chard, or kale to restore lost sodium, potassium, magnesium, and chlorine.
12. Optimal Sauna Timing
Schedule sauna sessions either after a workout or on non-workout days, as doing it immediately before a workout is generally not recommended due to potential exhaustion and discomfort.
13. Alternative Heat Stress Methods
If a traditional sauna is unavailable, consider steam rooms, steam showers, hot baths (if kept hot long enough), or hot yoga as alternative methods to induce heat stress and activate similar beneficial stress response pathways.
14. Avoid Alcohol with Sauna
Absolutely do not consume alcohol while in the sauna or immediately before, as it is the most dangerous health risk, potentially causing severe dehydration, hypotension, arrhythmia, and embolic stroke.
15. Consult Physician/Avoid if Pregnant
If you have any medical conditions, consult your physician before using a sauna, and if you are pregnant, it is generally best to avoid sauna use.
6 Key Quotes
Short-term stress can result in a reduction in long-term chronic stress. In other words, we can build resilience.
Rhonda
Aging is caused by a molecular switch about eight hours into adulthood of a worm that deactivates heat shock proteins.
Rhonda
FOXO3 is the so-called longevity gene.
Rhonda
Sitting in the sauna, the heat stress from the sauna, to some degree, mimics cardiovascular exercise.
Rhonda
Exchanging one chemical for another is not always a good thing.
Rhonda
Do not drink and sauna.
Rhonda
2 Protocols
Post-Sauna Electrolyte Replenishment
Rhonda- Drink plenty of water.
- Replenish electrolytes using coconut water or by blending spinach, chard, or kale with water.
Sauna Use for Enhanced Endurance (Study Protocol)
Rhonda, describing a study- Perform a 30-minute sauna session.
- Repeat two times a week for three weeks.
- Do this after a workout.