- Apr 11, 2015
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Sorry, mud I disagree (with this movement pattern). Both hips are extending which is why folks speak the importance of the hitting position. The hips extending are reactive to the contraction..
Flexion is the opposite of extension. The pelvic girdle is one solid structure, and as stated previously, the only way to make it go in the same direction is for both legs to be acting on it the same way, and in the same direction...ie. the weightlifter.I think both hips extend. The tell tale sign is piazzas front foot coming off the ground and getting sucked back underneath him in his follow through. This is what makes it such an excellent gif in my opinion.
It is tricky because extension occurs with the feet not underneath the pelvis like in the weightlifter.
Piazza is not pushing the leg straight with the quad as much as its getting straightened as the hip extends with his foot on the ground.
A quad push alone results in no hip extension, which means the torso would not be moved as a result and no torque on the bat. A quad push does make it easier for the hamstrings/to extend the hip though I think.
Interesting read here.
What muscle prevents knee hyperextension?
Answer (1 of 4): Hi there, If you are getting pain and it is not getting better, then it's time to go see someone. Very unfortunately we are not yet at the time when we can see and feel each other through the internet! And we would need to physically assess your knee to give you a meaningful ans...www.quora.com
However, if you have the legs acting on it in opposite directions (one from the rear, and one from the front) as in a baseball swing, you're going to have opposite actions within the hips...one extension, and one flexion.
Sorry, but that's just how it works, and referencing a completely different body part, and joint structure (hip = ball and socket....knee = hinge joint) doesn't apply to or help the understanding of what's happening between the legs, "hips", and PG in the swing.
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