Have you heard of fast-twitch and slow-twitch muscle fibers? These are the two types of muscle that are responsible for all your gains in the gym. And depending on how you train — and even your own ...

For fitness-minded folks, muscle testing can sound pretty intriguing. But it turns out that it has little to do with fitness...or even muscles. On a basic level, muscle testing looks at a muscle and ...

Knowing when an athlete can safely return to training after intense exercise typically relies on coaches and athletes making best-guess estimates, but a new easy-to-use fingerprint blood test, ...