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« on: June 22, 2011, 04:51:06 pm »
Would you say that the limiting factor is hamstring "responsiveness" in preventing knee collapse at high speed in a one-leg jump. According to Lance, once the quad is developed pretty well, it's not even the hamstring strength that's the limiting factor, it's how the hamstring comports itself in a high speed plant.
At first I wasn't sure he's right but now I'm convinced he is. I can do about 8-10 natural glute ham raises no problem, yet I still have knee collapse issues in my plants, especially as I'm not warmed up. The knee just goes forward and I fail my jump. And apparently, lately, it happens as I feel the knee part of the hamstring not being able to cope with the shock.
It still doesn't make any sense in my mind biomechanically as the quad should contract eccentrically to stop the knee from going forward and not the hamstring. The only thing I see is the hamstring contracts eccentrically to prevent hip collapse and as the hamstring contracts the quad needs to relax - and this leads to the knee going forwards. That's the only thing I can see happen.
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