Your quads, or quadriceps femoris muscle group, are four separate muscles that run along the front of your thigh between your hip and your knee. It's one of the largest (and strongest) muscle groups ...

Together, these muscles work in sync to propel your legs up and down. And while it’s normal to feel tightness and soreness following, say, a series of heavy walking lunges, the quads can also tighten ...

Add Yahoo as a preferred source to see more of our stories on Google. Getty Images Knee pain is a common complaint, but you can help manage—or even prevent it—by stretching these key spots. Got knee ...