[goodroot]

Right, the rationale for why saunas and heat stress is good for you is specifically because it raises the heart rate.

[retrac]

Hot sauna is often cautioned against for those with existing cardiac or vascular problems, with some reason.

[DANmode]

Exercising or stressing damaged or degenerated tissues = bad

[hbcdbff]

Sauna raises HR without increasing blood pressure though (modulo some possible initial short spike at the beginning), because your blood vessels dilate.

[iwontberude]

Cannabis causes dilation of blood vessels and elevated HR, it’s the same effect. If you take a big dab you can definitely feel your blood pressure drop and muscles relax even though your heart rate has increased.