Bow-and-Arrow Arm Swing

The 'bow-and-arrow' is where spike power originates — and it's an overhead rotational kinetic-chain action, the same torque a baseball pitcher uses. At the top of your jump, your GUIDE (non-hitting) arm points up toward the ball while your HITTING arm pulls back, elbow HIGH (around shoulder line, an 'L' shape) —…

FilmableFilm this on your phone and TrueForm measures your body mechanics and tells you what to fix. You get angles, not a made-up score.