Gluing yourself to a chair or couch for prolonged periods can tighten the hip flexors (the muscles at the front of your hip that help lift your leg) while simultaneously weakening the glutes, Pavao ...

After you hit 50, growth hormones—like testosterone and estrogen—decline substantially, which can take a major toll on your supply of lean muscle mass. Aging also slows metabolism, resulting in a ...

In this challenge, contenders take on a contortionist’s hardest stretches. How a DNA test solved a medical mystery – and revealed a doctor’s decades of deception The U.S. Is Preparing for War in ...