What exercises can I do to strengthen my legs for roller skating?

Two good ones. For the sports involving leg movement, especially side to side(skating, skiing) the medicine ball thrust and the lateral band walk are good to start. In the ball thrust, take a ball in both hands, squat with the kness slightly bent, then push the ball up toward the ceiling, rising off your toes.For the band walk, side step with an elastic band around your legs just below the knees. Five per side..