A new book on willpower asserts that it's a muscle. That is, you can strengthen it with practice, and you can exhaust it with stress and overuse. This makes sense, and years of research back the idea.

PORTLAND, Ore. (AP) — Self-control. It helps you resist the urge to yell at your boss. It keeps you from eating a whole pint of ice cream. And you summon it up when you want a pair of shoes, TV or car ...

Almost everybody faces self-control problems at some point in life. Shedding a couple of extra pounds, turning down the third beer of the night, exercising instead of sitting on the couch watching ...

Bodyweight exercises are an effective way to improve strength, joint control, mobility, and core engagement without equipment ...