At first, the idea of doing a 90-minute workout in a 40 degree room sounded like torture. But the sweating is exactly what I became addicted to. My body changed dramatically almost immediately. Within three classes, I noticed less belly fat. My knees and legs are stronger than ever now; my arms have definition for the first time in my life; and my posture is much, much better. I also feel completely energized from all of the deep breathing. I leave class relieved of any anxiety I went in with, and the sweating and detoxifying make my skin feel great.