I couldn’t find the full text for this anywhere, and the abstract was rather vague, but you don’t hear a whole lot about sauna use and eating disorders. Pretty obscure.
The paper presents the results of heat treatment in three cases of anorexia nervosa (AN), in which marked overactivity and/or strenuous exercising were prominent clinical features. Heat was supplied in three ways: continuous exposure to a warm environment, wearing a thermal waistcoat, and sauna baths in an infrared cabin. The outcomes went far beyond what had been expected, as the disappearance of hyperactivity was followed by progressive recovery. (via.)