Adarq.org

Simple question, is it true 2 legged jumps are quad dominant while 1 legged jumps are glute/ham dominant?  Or does it depend on lots of variables

What are the variables?

I have gotten my best jumps off one leg and I am not a reactive jumper, I am a strength jumper.

Conventional wisdom says that if you are a strength jumper than you do better off 2 feet.  Or, if you are good at jumping off one foot then you must be long-limbed.  I am only 5 ft. 9 in. so I am not long limbed at all.  On the other hand, I seem to be able to translate the speed of my run-up off one leg better then when I do a run-up and jump off both feet.  2-legged running jump feels so unnatural to me.

I am just interested to hear from anyone in a similiar position.  It's not like my glutes and hammies are stronger than my quads.  I sqaut slightly more then I deadlift, so chances are I am quad dominant. 

Is it possible to be quad dominant and be better at one legged jumps? 

Thanks

i believe any form of VERTICAL jumping is quad dominant, double or single..

take a look at some elite high jumpers, these jumps are an insane amount of quad.. look at how they plant stiff and their leg bends like a "bow" as they impact, this results in some serious quad contribution as they center their mass over their ankle and then take off.. quad/glute/calve is insane in any vertical jump, as you transition into horizontal displacement, quads become less important according to the ankle, and glute/ham contribution increases.

http://www.adarq.org/forum/crazy-weird-analysis-stuff-)/galleries-high-jumpers/

try some stiff leg ankle hops/stiff pogos and you'll get an idea of what i mean.. here's a high jumper performing some stiff leg pogos, look at his stiff landing and then his forward knee shift:

http://www.adarq.org/forum/crazy-weird-analysis-stuff-)/galleries-hopping-exercises/

pc

Let me put up a silly question:

If you were to jump using your arms, what would be more important: forearm strength, triceps strength or deltoid strength?

I think the quads are better for standing VJ, while the glutes are better in running jumps. The reason I see for that is leverage. You can use the glutes better when you throw your legs (feet) in front of you and hip extend using the leg length leverage than in a no-step VJ, where the quads can be used much better.