Interesting effects from 7 days of sauna (200°F for 20 min). It's early and I'll get more

Well SupportedA single 30-minute sauna session at 163.4°F (73°C) with 10-20% humidity can improve artery function and blood pressure in individuals at high risk for heart disease.

Well SupportedThe cardiovascular improvements observed from sauna use are consistent with strong clinical evidence supporting the cardiovascular protective effects of sauna.

Partially SupportedSeven days of sauna use at 200°F for 20 minutes resulted in a small downward shift in subendocardial variability ratio (SEVR) from 220-212% to 212-202%, which remains in the mid-normal range and reflects normal heart oxygenation.

Partially SupportedUrine hydration markers and repeated measurements will rule out reduced plasma volume and normal measurement variance as confounders for sauna's cardiovascular benefits.