Video 1 of 11 Resources Now Playing Step-Ups 01:28 Now Playing Walking 01:09 Now Playing Quad Stretch in Prone Position 01:03 Now Playing Side Lying Hip Abduction 01:11 Now Playing Short Arc Quad Extension 01:22 Now Playing Horizontal heel slides 01:00 Now Playing Straight Leg Raises 01:15 Now Playing Wall Squats 00:49 Now Playing Quad Sets 01:00 Now Playing Forward Lunge 00:41 Now Playing Seated Knee Extension 01:09