Prop one leg up on a raised surface, no higher than your waist, with your knee straight. You should be facing straight forward, standing on the other leg. Reach across your body and touch the toe of the leg that's up and then move back to the starting position. Do 10 reps on each side, where you each across to stretch and return to the start position. If you need more of a stretch, raise the surface that you put your foot on.