 Keep your knees bent, check your stance, make sure your knees are bent, your feet are slightly wider than shoulder width, and your feet are pointing inwards and not pointing outwards. It's the same way, now I want to palm high, imagine a person that's six feet tall, or even taller, and palm higher, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, at that speed. Now palm lower, imagine a person is ducking, and you are palming downwards.