10/08/2026
Sauna & Heat Therapy For Longevity
Sauna is Medicine
The Sauna Science, Protocol, & Dosage
Heat's Impact on the Body
The Underappreciated Benefits
Finland is the golden child for sauna.
Finland has roughly 3.3 million saunas for a population of 5.5 million.
That works out to one sauna for every 1.7 people, making sauna use ubiquitous among couples, families, neighbors, and friends.
Humans have used heat therapy for thousands of years, and science now helps explain its benefits.
The Sauna Science, Protocol, & Dosage
Data on sauna use is increasingly promising for longevity.
In a 21-year Finnish study, participants who used a sauna 4-7 times a week had about 63% fewer sudden cardiac deaths compared to the lowest cohort of users.
In a systematic review and meta-analysis of 15 pooled studies, researchers found lower systolic and diastolic blood pressure and improved flow-mediated dilation.
Kunutsor et al.'s and Laukkanen et al.'s KIHD analyses found that frequent sauna bathing (4–7 sessions/week) was associated with a 61% lower risk of stroke, a 66% lower risk of dementia, and a 65% lower risk of Alzheimer's disease, with a clear dose-response gradient.
Ideally, plan sauna sessions post-workout or in the evening to help support muscle recovery.
Heat's Impact on the Body
Sauna heat mimics many effects of exercise.
Passive heat exposure raises core and skin temperature, stimulating the cardiovascular, vascular, endocrine, and thermoregulatory systems.
Your blood vessels dilate to move heat from the core out to the skin. The drop in vascular resistance forces the heart to increase heart rate and cardiac output.
Your heart rate increases as if you were working out, even while you are sitting still.
This controlled heat stress trains the blood vessels to be more elastic.
Heat induces heat shock proteins (HSPs). HSPs help prevent proteins from misfolding, refold damaged proteins, and protect mitochondria.
After a sauna session, your body shifts into the parasympathetic state (rest-and-digest). This can help keep your baseline calmer throughout the day.
The Underappreciated Benefits
We've covered the well-documented physiological effects of regular sauna use, but I want to highlight three secondary benefits that people often overlook.
A break from technology - given the fact that your phone will overheat in the sauna, you are forced to take a break away from your screens.
Sauna can be an amazing addition to your wellness routine, but it's not a replacement for cardio or strength training.
If you are new to sauna and heat therapy, then start small and build your tolerance with time.
Stay Hydrated. Replace What You Lose.
Hydration isn’t just about drinking more water — it’s about replacing what you lose.
When you sweat (from workouts, sauna sessions, or just daily life activities), you’re not just losing water — you’re losing electrolytes like sodium, potassium, and magnesium.
