Yesterday, I left my weekly spin class ― with its lovely dim lighting ― only to feel a hand on my bicep seconds after facing the bright lights of the gym. A fellow cycle class member wanted to know if ...

Busting, a Common Myth About Sweating, and Exercise. According to Lifehacker, how much you sweat is not a reliable indicator of weight loss, . fitness level or how hard you are working out. When your ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Sweat isn’t an ...

Twenty-six kilometres into this year’s London Marathon, I had to stop to be sick on the sidelines. I’ll spare the unpleasant details, but let’s just say it resulted in a very long (and tearful) ...