Skateboarder Exercise

I have not been able to produce a video for this exercise, but it is quite easy to understand. It is performed on a step - just like the Posterior Chain Exercises (this is in fact another PC Exercise) - Stand on the step facing to the right. Your weight is on your left foot. Bend your left knee and imagine the step you are on is a skateboard. Use your right foot to try and move the skateboard forward. Do not make actual contact with the ground, but rather miss the ground by a 2-5cms on each "push". Aim for a spot about 15cms in front of you then move the foot backwards to about 10cms behind you. Your right foot should make a circular movement as your left leg straightens on each push, then bends to help you reach the floor. Do 15 "pushes" on each leg to complete one set then swap sides and repeat. Do 3 sets of 15 reps on each leg. Again - try and keep your upper body as upright as possible and try as hard as possible to keep your balance.