I've been going in the sauna for about 20-30 minutes after my 1-1.5 hr workout and I just feel so calm when I get out. I have puddles of sweat below me by the end and then I hop into the cool shower and I feel revitalized.
Dr. Oz recently promoted the sauna on Oprah and he talked about the many benefits. When you get in the sauna and sweat, toxins are removed from your body. You also lose [water] weight, about 300 calories in 30 minutes. The sauna helps to keep your complexion clear and bright. And it really makes you relaxed.
After doing some research, I've found that the sauna is not to be relied on to lose weight! Yes you will burn calories because your heart rate increases and your glands produce lots of sweat. All weight lost is water weight. It's very important to drink fluids before, during, and after sauna use.