SINGLE-LEG SQUATWHY THEY HELP: When you push off into a sprint, you’re essentially putting all your power into one leg at a time. While regular squats are great for activating key muscle groups in your legs — quads, hamstrings and glutes — single-leg squats help train each leg to take the full weight of the body as they would do in a sprint to develop the power you’ll need to launch yourself forward when chasing a fast through-ball.