[quote]*Rotation/hip-shoulder separation. This is where I see the most potential gain. He seems to have very little separation between his hips and shoulders, which gives the appearance of thowing with a lot of arm. This seems to be improving gradually as he gets stronger, but a higher glove position out in front of the stride foot should help buy time for later shoulder rotation.
Also remember that while his torso hip seperation is not great right now he is only 11. He has nowhere near the strength of say a Tim Lincecum or a CC Sabathia. These pitchers are full matured and have developed high amounts of athletic strength. Not to say that your son shouldn’t work on perhaps staying closed longer, I’m just saying that he should gain more seperation and velocity as he gets older and stronger.[/quote]
Thanks, Priceless. This is a very good point.
I’ve wondered, and maybe others could comment, whether hip/shoulder separation is a function of strength, flexibility, or motor skill development (or a combination of the three).
Frankly, it doesn’t seem to take much strength to rotate the hips independently of the shoulders, but it does take some flexibility. I can see how more strength would increase the torque generated when the shoulders are subsequently brought back into alignment with the hips.
It also seems that the natural human tendency is to rotate the hips and shoulders simultaneously or to intiate trunk rotation with the shoulders. This leads me to believe that hip/shoulder separation is partly a learned skill.