Here's how to buy a running hydration pack for marathon to trails. Tested and recommended by a running coach with 20 years ...

Cola, Sprite.’ Justin Sullivan/Getty Images Valerie M. Fridland, University of Nevada, Reno With burgers sizzling and ...

And there's a 95% chance it'll be the second or third hottest year. Given the heat, hydration is crucial—but there's a lot ...