Fueling during exercise is a delicate dance. Eat too little, and you risk heading straight for a bonk. Eat too much, and your gut may revolt, sending you to the roadside (or trailside) privy. Indeed, ...

Nobody ever changes a strongly held opinion because of a single study. It’s too easy to find potential flaws in any given set of results: they tested the wrong people, or used the wrong protocol, or ...

Here’s what to know about body composition numbers and what these metrics mean for your health and performance.