This workout consists of four-minute bursts of exercise, done at 85 to 95% of your maximum heart rate. Afterwards, you get ...

As with any professional sports league, the NFL is full of athletic freaks. However, Baltimore Ravens running back Derrick Henry takes it to another level entirely. Henry's most notable strength is, ...

You’re out for a long run filled with rolling hills and you start to feel the burn in your leg muscles. It makes sense: You know your lower body is working hard to propel you through your miles. Yes, ...