Exercise saves heartbeats rather than wasting them, potentially extending life through improved heart efficiency.

A new study explores “heartbeat consumption,” a fitness metric that counts daily heartbeats. Could smartwatches soon track your heartbeat budget?

Elite athletes who have run a mile in less than 4 minutes tend to live longer than the general population, according to a retrospective study. The study adds to a growing field of research ...

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. Strokes can cause debilitating damage. Two ...

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 ...

HANGZHOU, China — When it comes to keeping your brain young, there’s a sweet spot for how much exercise you get. Get too little physical activity and your brain ages faster. Get too much, and the same ...