The hamstring muscles are responsible for your hip and knee movements in walking, squatting, bending your knees, and tilting your pelvis. Hamstring muscle injuries are the most common sports injury.

For strong, powerful legs, you need to work both your quads (on the front of your thighs), and hamstrings (on the back). For the quads, squats are a given. But what are the best exercises to hit the ...