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« on: February 24, 2011, 07:57:55 am »
You know, I was thinking: if you bend at the knee a lot, like you do adarqui, you take a lot of hamstring AND calf tension out of your legs, at least in the amortization phase. Hamstrings because the knees go forward and calves because the calves (gastrocs) are active when the knee is extended. When the knee is flexed, the soleus is actually doing job. The gastrocs probably exert power in the end (at the triple extension finish basically) when the knee is straight.
Now obviously the calves also amortizate your way towards the half squat position where the soleus si more active, so yeah, they still do jobs at both ends of the amortization phase.
The point was that I think the soleus is more important to deeper jumpers than those who jump with less knee bend, if that's important at all. Less knee bend means more tension in the hamstrings as well, so you need more hamstring strength in a one-leg jump.