What Is Runner's Knee? Runner's knee isn't just for runners, and it’s not one particular injury. It's a broad term that describes kneecap pain that can result from many different problems.

With that, here are five common muscle weaknesses that contribute to injuries, aches, and pains in runners. With the help of ...

Tying shoelaces, getting into a car, picking things up off the floor and walking down stairs all involve flexing that most ...