HOW: Get set-up laying flat on your back. On the side, you want to focus on, bring the knee towards your chest as close as you can get it, then keep it there holding it with your hands behind your knee. While maintaining this position, straighten your knee and point your foot down. Work within your tolerance, if it is too much bring your knee further away from your body or does not straighten your knee as much. Repeat
FEEL: You will feel a pulling and stretching sensation behind your thigh, knee, and even into your calf and foot. If you feel pins and needles or other nerve-like symptoms, back off from the stretch.