09/20/2024
SAUNA USE 4-7 TIMES A WEEK ... HUGE REDUCTION IN ALL-CAUSE MORTALITY. Finnish studies have provided significant insights into the relationship between sauna use and all-cause mortality. These studies, particularly from the Kuopio Ischemic Heart Disease Risk Factor Study (KIHD), have shown that frequent sauna use is associated with lower mortality rates, as well as reduced risk of cardiovascular disease and certain chronic conditions.
Here are the key findings from these studies:
1. Sauna Use and Reduced All-Cause Mortality:
A 2015 landmark study, published in JAMA Internal Medicine, followed over 2,300 middle-aged men from eastern Finland for around 20 years.
The participants were divided based on their frequency of sauna use:
1 time per week
2-3 times per week
4-7 times per week
Findings:
Those who used the sauna 2-3 times per week had a 24% lower risk of all-cause mortality compared to those who used the sauna only once a week.
Men who used the sauna 4-7 times per week had a 40% lower risk of all-cause mortality.
These results suggest a dose-response relationship, where more frequent sauna use is linked with greater reductions in mortality risk.
2. Cardiovascular Mortality:
Frequent sauna use was associated with significant reductions in the risk of cardiovascular-related deaths:
Sauna use 2-3 times per week was associated with a 27% lower risk of cardiovascular mortality.
Sauna use 4-7 times per week was associated with a 50% lower risk.
This reduction is likely due to sauna's benefits in improving blood circulation, lowering blood pressure, reducing inflammation, and improving vascular function.
3. Sudden Cardiac Death:
The same study also found that regular sauna use significantly reduced the risk of sudden cardiac death.
Men who used the sauna 2-3 times per week had a 22% lower risk of sudden cardiac death.
Those who used it 4-7 times per week had a 63% lower risk.
4. Additional Benefits:
Sauna use was also associated with a reduced risk of other conditions like:
Stroke: Frequent sauna use was associated with a lower risk of stroke, as shown in a 2018 study from the same research group.
Dementia and Alzheimer’s: A 2017 study showed that men who used the sauna 4-7 times per week had a 66% lower risk of developing dementia and Alzheimer's disease compared to those using the sauna once a week.
5. Mechanisms of Benefit:
The protective effects of sauna use on mortality are thought to come from a combination of physiological mechanisms:
Improved cardiovascular function: Sauna induces moderate cardiovascular stress similar to exercise, improving heart function and blood circulation.
Lowered blood pressure: Sauna sessions can lead to long-term improvements in vascular health and reductions in blood pressure.
Reduced inflammation: Regular sauna use has been linked to lower levels of systemic inflammation, which plays a role in chronic diseases.
Enhanced heat-shock protein response: Saunas activate heat-shock proteins, which help protect cells from stress and improve longevity.
Summary of Finnish Findings on Sauna and All-Cause Mortality:
Frequent sauna use (4-7 times per week) is associated with significantly lower risks of all-cause mortality, cardiovascular mortality, sudden cardiac death, and other chronic diseases.
The more frequent the sauna use, the greater the observed health benefits, showing a clear dose-response relationship.
These Finnish studies suggest that incorporating regular sauna sessions, particularly 2-7 times per week, could be an effective strategy for promoting longevity and reducing the risk of a wide range of chronic health conditions.