Add Yahoo as a preferred source to see more of our stories on Google. Try to do your daily run in the forest when it's hot out to protect yourself from the heat. Sunscreen is still a must, however.

You know that sensation of sweat dripping on your body when you’re doing a run, dance class, or strength training? Some believe that sweat is a sign of a good workout. Others might wonder if it’s a ...

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 ...