Working out in muggy weather can be brutal. Here are four ways to survive and thrive when it feels like a sauna outside. Credit...Justin J Wee for The New York Times Supported by By Danielle Friedman ...

Extreme heat makes it especially hard for your body to cool down, so you need to be extra careful if you exercise or play sports when it’s baking outside. Your brain tries to keep your body within a ...

The heat index is a measure of how hot it really feels on your body when relative humidity is factored in with the actual air temperature. Since heat index values were devised for shady, light wind ...

In the summertime many of us are itching to ditch the gym and go for a run outside or take an outdoor yoga class — but it's just so damn hot and humid. Right now, as many parts of the country are ...

"It's not the heat, it's the humidity." Actually, it's both, and that's where the National Weather Service's heat index comes in. Also known as the apparent temperature, the heat index is a number ...