This exercise will improve the extensibility of your inner thigh muscles and improve hip external rotation.
Start on your hands and knees with your fingers spread apart, elbow pockets facing away and spine in neutral position. Extend your right leg out to the side. Rock forward and backward to find where you feel the most tension in the muscles. Rock for 1 minute then spend more time in the area where you feel the most tension. Adjust your foot position to feel even more of a stretch.