For 14 excruciating days, Amy Blumenthal was a paragon of willpower. By night, the 38-year-old was a waitress, serving burgers and fries and other dinner treats at a San Francisco restaurant. By day - ...

If you’ve ever been to a sauna or hot yoga class, you know that some people swear by the “cleansing” power of sweating. The idea is that through sweating, your body rids itself of a significant amount ...