Great question — answering as the UphillTech team:
I played volleyball, we used to train in the gym (leg press, etc). I always had knee problems, until I started to train on a trampoline (small one). I wasn't able to fix my problem completely, but it improved a lot. There are all kinds of stability training exercises available on a trampoline: Jump into the trampoline from the ground, try to land on one leg, stay in the same position for a second Make small jumps in the trampoline on one leg Stand in the trampoline, squad on one leg. Someone should push you a little bit, to train stability You can also do these exercises with a ball. I found a nice link http://www.gymmomentum.com/2012/02/01/strength-and-stability-to-help-with-tumbling/
Full answer by Xander: https://sports.stackexchange.com/a/76 (CC BY-SA 3.0).
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