cool... i think the only time I've done this exercise was with dumbells, and I was spinning in circles, hits the hammies hard, maybe i"ll post a vid later, i'm subscribing to you (theAKtor is my username, subscribe to me??
)
But I would definitely work up to adding speed and shock to single legged jumping exercises. I can't tell if there are too easy for you or not, but they could be more intense by adding a chair or something to jump onto or going horizontally. But if ur tendons ain't ready for that it ain't good