INSTRUCTIONS
Stand on the side of a box on one leg, with your other leg off the box in mid-air. Without flexing at the hips, bend your knee that you are standing on so you other leg lowers to the floor and then return. You are trying to keep you knee inline with your foot, so your knee cap in directly over the middle of your foot. You should be able to see you big toe and your 5th toe. If you knee crosses over your big toe inwards, this is a fail.
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