According to Guyton’s Textbook of Medical Physiology, 0.568 kcal are required to produce a gram of sweat. Thus, a profuse sweat (such as you get from FitBomb) requires a large amount of calories.
Per the Journal of the American Medical Association, the average person can expend about five hundred grams of sweat during a thirty minute sauna session.
For people who routinely exercise and work out, using a sauna for weight loss is a great addition to an already active lifestyle. For those who are unable to exercise, or who simply cannot tolerate the idea, FitBomb is a great substitution.