HOW: In a seated position, place a rolled small towel behind your knee as you bend it up to hold the towel in between your thigh and lower leg. Use both hands to pull your lower leg towards your thigh. Make sure to pull your leg straight back, inwards, and outwards to feel a different stretch.
FEEL: You should feel a stretch in your knee.
COMPENSATION: Keep the towel roll behind your knee to create a gap for a good stretch.