The quadriceps and hamstrings work together to move your leg. Buy Stunt Stand Door Flexibility & Stretching Leg Strap - Great for Cheer, Dance, Gymnastics or Any Sport! Young girl playing tug-of-war with unseen opponent, rope stretching out my ears. Standing straight while keeping your knees to open out to sides. Perform these easy-to-follow stretches once or twice a day, a few days each week, and you'll start feeling the benefits of stretching and maintaining healthy leg muscles is.