Virasana, or hero pose, is effective in treating flat feet and knock knees. This variation will help those with knock knees. Start by standing on your knees, then sitting down on your heels. Place a yoga block between the heels and sit on it. Make sure the knees are pointing straight forward and not touching each other. Hold for 20 to 60 seconds.
Block Between the Thighs
While standing, place a yoga block between the thighs as close to the pelvis as possible. Bring the feet as close together as possible and relax the inner thighs. Hold the pose for up to three minutes. This pose positions the legs in the opposite position of knock knees, bow-legged, which makes it therapeutic in correcting the original condition. Warrior 2 Pose Against a Wall
Warrior 2 pose can help strengthen the knees if performed with proper alignment. Perform this pose against a wall or with the guidance of an experienced teacher to ensure proper alignment. In a standing position, bring the legs 4 feet apart and stretch the arms out to the side. Turn the right toes to the right and deeply bend the right knee. Activate the arches and keep the right knee touching the wall. Hold for 30 seconds and repeat on the other side. Downward-Facing Dog Pose with Block
To perform this variation of downward facing dog pose, you will need a yoga block. While standing, place the block between the thighs and position the feet hip-width distance apart. Lower the hands to the ground and form the body into a V-shape. Hold for 30 to 60 seconds. The block between the thighs prevents the knee
Read more: http://www.livestrong.com/article/377237-knock-knees-in-yoga/#ixzz1zyOkkNvM