Is Heat Therapy good for energy & vitality?

The evidence is still emerging, so it's too early to say for certain. A systematic review and meta-analysis found heat therapy produces modest improvements in blood pressure and peripheral vascular function, and a separate meta-analysis found heat therapy may help patients with heart failure, though the evidence for the latter is not yet strong enough for firm clinical recommendations. That's reflected in an evidence score of 37/100 for its role in energy & vitality, drawn from 6 studies, with an estimated impact on longevity rated limited (23/100).