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Progress Journals & Experimental Routines / Re: Two Hands Two Feet
« on: November 14, 2012, 07:14:48 am »
Yeah because you associate "weaker" with squat strength and ignoring calf and hamstring strength. You were probably stronger relatively in your calves and possibly hamstrings at that weight. Obviously the speed you get into your runup will increase your body mass in the plant and it makes quite a bit of difference.
5 kg x 10 times bodyweight in the plant = 50 kg more to overcome for the calves... especially with these being concentrated on one leg (during the one-leg jump). It might manifest itself as the knee "giving out" when in reality is the calves that are overloaded, the ankle collapses, the tibia is traveling forward and they overload the knee (bend the knee) and quad in return. Same with the hamstrings. If they are weak your body will shorten them at the knee to prevent excessive tension to be applied to them, and since the knee becomes bent then the quad will be overloaded, and your knee will give out.
It's interesting because both these scenarios will make you think you have weak quads.
5 kg x 10 times bodyweight in the plant = 50 kg more to overcome for the calves... especially with these being concentrated on one leg (during the one-leg jump). It might manifest itself as the knee "giving out" when in reality is the calves that are overloaded, the ankle collapses, the tibia is traveling forward and they overload the knee (bend the knee) and quad in return. Same with the hamstrings. If they are weak your body will shorten them at the knee to prevent excessive tension to be applied to them, and since the knee becomes bent then the quad will be overloaded, and your knee will give out.
It's interesting because both these scenarios will make you think you have weak quads.