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Progress Journals & Experimental Routines / Re: Age vs Vertical
« on: September 26, 2012, 07:29:31 pm »
Yeah I completely agree.
You know, for a lot of time (years) I thought the knee collapse occurs because of weak quads. I mean they get loaded eccentrically since they PREVENT the knee to flex (and they fire to keep it extended), so they must be the culprit of the knee collapse right?
Well, it turns out they are caught in the plant in their strongest, completely contracted concentrically (basically shortened) position whereas the hamstrings, because you have the leg out in front of you (all us people going for dunks get our jump leg so far in front in order to gain some more leverage, especially us shorter people) - you are bent at the waist quite a bit so the hamstrings receive all that shock while they are STRETCHED so they actually are very overloaded, much more so than the quads. And the hamstrings have the tendency to be weaker than the quads as well so you get a double-whammy there.
It took me quite a while to accept/understand this, I was thinking "what business do the hamstrings have at all in keeping the leg straight?" and biomechanically, they have none. But the way they function is what causes the knee to faulter and the quad overload to occur in the first place.
Sorry to hijacking vag's thread by the way but I find this fascinating, and could possibly help other people too.
But yeah I totally agree with you, take RDLs, straight leg deadlifts, GHRs, whatever, get them heavy using the right movement and you shouldn't really have reasons to complain about weak hamstrings I guess.
You know, for a lot of time (years) I thought the knee collapse occurs because of weak quads. I mean they get loaded eccentrically since they PREVENT the knee to flex (and they fire to keep it extended), so they must be the culprit of the knee collapse right?
Well, it turns out they are caught in the plant in their strongest, completely contracted concentrically (basically shortened) position whereas the hamstrings, because you have the leg out in front of you (all us people going for dunks get our jump leg so far in front in order to gain some more leverage, especially us shorter people) - you are bent at the waist quite a bit so the hamstrings receive all that shock while they are STRETCHED so they actually are very overloaded, much more so than the quads. And the hamstrings have the tendency to be weaker than the quads as well so you get a double-whammy there.
It took me quite a while to accept/understand this, I was thinking "what business do the hamstrings have at all in keeping the leg straight?" and biomechanically, they have none. But the way they function is what causes the knee to faulter and the quad overload to occur in the first place.
Sorry to hijacking vag's thread by the way but I find this fascinating, and could possibly help other people too.
But yeah I totally agree with you, take RDLs, straight leg deadlifts, GHRs, whatever, get them heavy using the right movement and you shouldn't really have reasons to complain about weak hamstrings I guess.