Start lying on your right side with your right leg straight and a foam roller underneath your left knee.
Extend your arms to the right. Stack your left hand on top of your right hand.
Without moving your left leg, lift your left arm and begin to rotate toward the left. Your head should follow the motion of your arm.
Rotate as far as you can without moving your pelvis and taking your knee off the foam roller. This should not hurt. If it does, decrease your range of motion. This counts as one rep.