It can be tough to head outside on rainy or snowy days. That’s why you need this tool kit of exercise tips to stay warm and injury-free in the worst wintry mix. Has winter sent your outdoor fitness ...

Twenty years after the introduction of the theory, we revisit what it does—and doesn’t—explain. by Clayton M. Christensen, Michael E. Raynor and Rory McDonald Please enjoy this HBR Classic. Clayton M.

They've lost canes and walkers, aches and pains, weight and woes. And they've gained flexibility, better sleep and new friendships. These seniors haven't found a secret serum but something much more ...

We've all seen it happen: finding the motivation to actually make it to 6 a.m. boot-camp with a friend; nailing the last round of squats when you see those around you powering through; or pushing ...

BALTIMORE — Abraham Lincoln might have survived being shot if today's medical technology had existed in 1865. Given that scenario, the question is whether Lincoln would have recovered well enough to ...