Originally posted by Saint
If you do that you are most likely to lift your legs up which that does not make you jump higher.
This. If I can find the video of JJ Watt doing a 61" vertical jump. Granted he does have to tuck but I still can't imagine the leg strength you'd need to have to drive yourself upward to a standing position after doing it lol.
Edit: Found the video. Or at least a video that shows it w/ cheesy commentary by a chick who was losing her voice for reasons we probably shouldn't discuss here.