High-intensity running is linked to telomere length and other crucial indicators for longevity.

See ya later, mindless movement. These workouts are dripping with intention.

How to improve your balance, stat.

How you can be more like the startlingly fit, and yet still hilarious, It’s Always Sunny star.

When you work out makes a difference. Here's what your metabolism has to say about it.

This trend is backed by physical therapists and boasts major benefits for your body. Here’s how to do it.

Plus, his go-to fitness gear.

We prefer our eight hours of sleep, thank you.

Plus, it decreases your risk of dying by up to 18 percent.

We tapped a former Marine to assemble a 45 minute program to push your body and mind to the limit.

14 workouts to build strength in as little as 20 minutes.

Work smarter, not harder.