#048 Sauna Use as an Exercise Mimetic for Heart and Healthspan
Dr. Rhonda Patrick, PhD, discusses how sauna use acts as an exercise mimetic, offering robust benefits for cardiovascular health, longevity, and overall healthspan. She details its impact on heart disease prevention, stroke risk, and inflammation.
Deep Dive Analysis
22 Topic Outline
Introduction to Sauna as Exercise Mimetic for Heart Health
Compelling Research on Sauna's Overall Health Benefits
Sauna Use and Reduced Sudden Cardiac Death Risk
Sauna's Impact on Coronary Heart Disease and Cardiovascular Mortality
Sauna Use and Stroke Risk Reduction
Sauna's Effect on Hypertension and Arterial Compliance
Comparison of Finnish Sauna vs. Waon Far-Infrared Therapy
Physiological Overlap Between Sauna Use and Physical Activity
Sauna's Benefits on Autonomic Nervous System and Heart Function
Sauna Use and All-Cause Mortality & Alzheimer's Disease Risk
Heat Shock Proteins: Mechanism for Longevity and Protein Structure
Heat Shock Proteins and Muscle Atrophy Prevention
Sauna's Role in Lowering Inflammation
Additional Benefits of Sauna Use (Mood, Detoxification)
Important Contraindications and Safety Considerations for Sauna Use
Additive Effects of Sauna with Exercise and Fasting
Optimal Sauna Duration and Acclimation
Finnish Sauna vs. Infrared Sauna for Home Use
Other Modalities for Increasing Core Body Temperature
Time-Restricted Eating for Healthspan Improvement
Prolonged Fasting and Fasting Mimicking Diets
Broccoli Sprouts and Sulforaphane for Healthspan
6 Key Concepts
Exercise Mimetic
Sauna use mimics the physiological responses of moderate physical activity, such as increased heart rate, cardiac output, and improved heart rate variability, without the physical exertion. This allows it to confer similar cardiovascular benefits.
Heat Shock Proteins (HSPs)
A family of chaperone proteins that respond to stress, like heat, by maintaining the proper three-dimensional structure of proteins within cells. They prevent protein aggregation, which is implicated in age-related diseases, and are crucial for protein function and lifespan.
Protein Aggregation
The process where damaged or misfolded proteins accumulate and stick together, forming clumps or plaques. This phenomenon plays a causal role in many neurodegenerative diseases like Alzheimer's and Parkinson's, and some cardiovascular diseases.
Heart Rate Variability (HRV)
A measure of the variation in time between heartbeats, indicative of the autonomic nervous system's balance. Increased HRV suggests a better capacity of the heart to respond favorably under stressful conditions and is associated with improved cardiovascular health.
Time-Restricted Eating
An eating pattern where all food intake occurs within a specific daily window, typically 6-11 hours, followed by a fasting period. This practice aligns eating with circadian rhythms, improves insulin sensitivity, and activates stress response pathways beneficial for healthy aging.
Fasting Mimicking Diet (FMD)
A specific diet with controlled caloric and macronutrient content designed to activate the same molecular pathways as prolonged fasting, without requiring complete food deprivation. It has shown promise in improving disease status in conditions like multiple sclerosis and potentially sensitizing cancer cells to treatment.
9 Questions Answered
Sauna use significantly lowers the risk of sudden cardiac death, coronary heart disease-related death, cardiovascular mortality, stroke, and hypertension, with benefits increasing with frequency and duration. It also reduces all-cause mortality and Alzheimer's disease risk.
Both sauna use and moderate physical activity elevate core body temperature, increase heart rate (up to 150 bpm), redistribute blood flow to the skin, increase cardiac output, and improve heart rate variability and parasympathetic activity.
For Finnish saunas (around 174°F), using it 2-3 times a week for at least 11 minutes shows significant benefits, with 4-7 times a week and 20+ minutes per session yielding the most robust effects on cardiovascular health and longevity.
Heat shock proteins maintain the proper three-dimensional structure of proteins, preventing aggregation implicated in age-related diseases, and have been shown to slow muscular atrophy and play a role in human longevity.
Yes, sauna use has been consistently shown to lower inflammatory biomarkers like C-reactive protein in a dose-dependent manner and increase anti-inflammatory biomarkers like IL-10.
Alcohol consumption before or during sauna use is a major contraindication due to risk of death. Elderly people prone to low blood pressure, individuals with recent myocardial infarction, angina pectoris, or severe aortic stenosis should also exercise caution or avoid it.
There is published evidence of an additive effect between physical activity and sauna use, leading to better improvements in mitochondrial function. While not specifically proven for fasting, it's believed different molecular mechanisms may offer complementary benefits.
Time-restricted eating improves insulin sensitivity by aligning food intake with the body's circadian rhythm, activates genetic pathways for stress response that clear cellular debris and dysfunctional organelles, and can lead to better compliance than traditional dieting.
Prolonged fasting (e.g., 48+ hours) or fasting mimicking diets can activate stress response pathways, making normal cells more resilient to toxic treatments like chemotherapy while sensitizing cancer cells to death. In animals, it causes organs to shrink due to preferential death of damaged cells, followed by rejuvenation with new, healthy cells during refeeding.
16 Actionable Insights
1. Consult Doctor for Heart Issues
If you are suffering from a heart-related condition, consult your physician to determine if sauna use is appropriate for you, as due caution is important.
2. Optimize Finnish Sauna Frequency
For robust cardiovascular benefits and reduced mortality risk, use a Finnish sauna (around 174°F with steam) for at least 20 minutes, 4-7 times a week. Significant benefits are also observed with 2-3 sessions per week.
3. Consistent Sauna Use for Health
Aim to sit in a hot sauna for about 20 minutes, at least a couple of times a week, as this practice is believed to stave off the aging process and provide robust cardiovascular health benefits.
4. Far-Infrared Sauna for Heart
For managing chronic heart failure or ischemic heart disease, consider daily far-infrared sauna sessions (around 140°F) for about 45 minutes, typically for two to three weeks, as this has shown to improve endurance, heart size, and vascular function.
5. Rehydrate Before & After Sauna
Rehydrate thoroughly by drinking plenty of water before and after sauna use, as individuals typically lose about 0.5 kilograms of sweat per session.
6. Never Mix Alcohol & Sauna
Never consume alcohol before or during sauna use, as there have been several case reports of death associated with this combination.
7. Acclimate Gradually to Sauna
If you are new to sauna use, start with shorter durations like 5 minutes and gradually increase your time in subsequent sessions as you acclimate, eventually aiming for the recommended 20 minutes.
8. Acclimate to Heat for Hsp
Frequently use the sauna or engage in physical activity to become heat acclimated, as this allows your body to increase heat shock proteins sooner and more robustly upon heat stress exposure, which helps maintain protein structure.
9. Finnish Sauna for Home Use
If considering building a home sauna, the speaker strongly recommends a Finnish sauna over an infrared one, citing personal preference for its hotter, steamy environment and robust effects.
10. Explore Other Heat Therapies
If a traditional sauna is not accessible, consider other modalities for increasing core body temperature, such as steam showers or hot baths, as they can offer similar health benefits.
11. Maximize Hot Bath Submersion
When taking a hot bath for heat stress benefits, strive to stay fully submerged under the water, as cooling parts of your body reduces the effectiveness of the heat stress.
12. Limit Children’s Sauna Time
For children using a sauna, limit their duration to much shorter times, such as around five minutes, compared to the longer sessions recommended for adults.
13. Practice Time-Restricted Eating
Eat all your daily food within a 6-11 hour window and fast for the remaining time to activate beneficial genetic pathways for healthy aging, improve insulin sensitivity, and align with your body’s circadian rhythm.
14. Consider Prolonged Fasting
Explore prolonged fasting of at least 48 hours, potentially through a fasting-mimicking diet, as it may improve autoimmune conditions and could potentially sensitize cancer cells to treatment while protecting normal cells.
15. Fasting Refeeding for Rejuvenation
Recognize that the refeeding phase after a prolonged fast is crucial for rejuvenation, as it triggers stem cell proliferation to replace old, damaged cells with healthy, new ones, leading to organ regrowth.
16. Add Broccoli Sprouts to Diet
Incorporate broccoli sprouts or sulforaphane into your diet as another important way to improve health span, as suggested by the speaker.
7 Key Quotes
I think in the next 10 years, sauna bathing may very well become part of the standard of care for the prevention and treatment of heart disease and a variety of heart conditions and for overall longevity.
Dr. Rhonda Patrick
So, over the next 30 minutes or so, I'm going to try to convince everyone here today that you should be sitting in a hot box for about 20 minutes a day, at least a couple times a week.
Dr. Rhonda Patrick
So, there's a lot of overlap between the physiological responses that occur when you sit in a sauna, and when you're physically active.
Dr. Rhonda Patrick
Protein aggregation is definitely not a good thing and it does happen as as the aging process occurs it happens more and more and heat shock proteins play a pivotal role in preventing that from happening and also that they've been shown to actually even help negate some of the process that if it's already occurred.
Dr. Rhonda Patrick
People are much more likely to be compliant in terms of if you have a person that has a lifetime of being sedentary and they're they have risk factors for cardiovascular disease or they may even have it. It's really hard to get them to to go out and be physically active it's very very difficult but when you tell them about the amazing you know things that the sauna the studies that have shown that the sauna has you know positive effects on a variety of different cardiovascular rated you know diseases and isn't good for prevention people think the sauna is like a spa treatment so they want to go sit in the sauna and and little do they know that it's really you sitting in the sauna is you know mimicking in many ways moderate aerobic activity.
Dr. Rhonda Patrick
I find for me like getting myself in the box where I can't like you know escape anything um works best.
Dr. Rhonda Patrick
The thing that starts that clock is the intake of food so the first calorie you take in is going to start that clock from ticking and so at that early point is going to be when you can be the most insulin sensitive and as the day goes on that sort of the sensitivity goes down.
Dr. Rhonda Patrick
5 Protocols
Finnish Sauna Use for Cardiovascular Health
Dr. Rhonda Patrick- Enter a dry sauna (Finnish type) heated to around 174°F, where water is thrown on rocks to create up to 20% humidity.
- Spend at least 20 minutes in the sauna per session.
- Use the sauna 2-3 times per week for significant effects, or 4-7 times per week for even stronger effects on cardiovascular health and longevity.
Waon Far-Infrared Therapy for Heart Disease Management
Dr. Rhonda Patrick- Use a far-infrared ray sauna heated to around 140°F.
- Spend about 45 minutes in the sauna per session.
- Perform this therapy daily for two to three weeks.
Acclimation to Sauna Heat
Dr. Rhonda Patrick- Start with shorter durations, such as 5 minutes per session.
- Gradually increase the time spent in the sauna with subsequent sessions.
- Continue until you can comfortably stay for 20 minutes or more.
Time-Restricted Eating for Healthspan
Dr. Rhonda Patrick- Eat all your daily food within a specific window, typically between 6 to 11 hours.
- Fast for the remaining hours of the day.
Prolonged Fasting (Water Fast) for Cancer Treatment Support
Dr. Rhonda Patrick- Undergo a 48-hour water fast.
- Perform this in conjunction with standard cancer treatments like chemotherapy or radiation.