Join Date: Jul 2001
Location: Sunny San Diego
Sounds like repetition is what you are looking for. The standing high-jump is good for developing that explosive power you are looking for, but you have to train to get there. That means a consistent program, not just jumping up 6 times and calling it a workout. The parachute is a vary viable solution, but by the way you immediately dismissed the idea, I think you are looking for a non-existent solution, it takes work to make gains like you want... For upper-body, shadow-boxing could be of some benefit, and even (dare I say it) aerobics classes can do quite a bit by upping your stamina, allowing for quicker recovery and more over-all power.
Raven 2006 Yamaha R6S
"If it has horsepower or tits you're gonna have trouble with it eventually..."