So we believe that body position, power zone and acceleration are the three things that all strokes and all sports have in common and if you accelerate through strokes, acclerate through your swing, whether that be tennis, whether that be golf, or whether that be a batting swing, as long as you have acceleration you have a chance to generate power and freestyle if you acclerate through your stroke, you generate power and you accelerate with proper hand speed, picking up your hand speed as you go through the stroke, you're going generate speed and power. 