Now this is pretty amazing. In a randomized, double-blind study conducted between February 2013 and May 2015, researchers at a university-based medical center found that a single session of whole-body hyperthermia (WBH) reduced depressive symptoms. Hyperthermia is just a fancy way of saying the body achieves a higher temperature than normal, in this case from participating in a sauna session. The conclusion was that "whole-body hyperthermia holds promise as a safe, rapid-acting, antidepressant modality with a prolonged therapeutic benefit."
So as we're heading into those long, cold, darks months, grab a sauna to fight those winter doldrums.