Bill Hartman's Weekly Q&A November 3, 2019 Podcast
And one of the ways that they actually stay back is the ability to internally rotate and pronate the front side arm. So the lead arm as they're pronating and reaching towards home plate, that's what actually pushes them back. And so Nick, you mentioned something in your question where you said the pronation of the glove hand compresses the front of the thorax, I would offer that what that does is it actually internally rotates the shoulder and positions the scapula to allow the internal rotation to occur. But what we have is we have internal rotation at the shoulder, but we'll have an eccentric yielding contraction at the stern, which allows the pump handle to come up. Otherwise, I can't capture this position. If I can't create the expansion under the pump handle on the lead arm side, I cannot stay back over the right foot. So I can't keep myself back. So then that's going to be the guy that doesn't hold the rear foot position long enough to capture the energy. And so they're essentially, they're either going to fall out of that front leg or they're going to try to push too soon. And then again, you're going to probably see that bilateral extra rotation or the extension based strategy in the throw. So again, great questions, Nick. So again, the things that I would check in that regard would be, do I have normal internal rotation on that lead arm? So if we go back to the lefty concept, whereas we might be concerned with with arm rotation or shoulder rotation rather of the throwing side, which is the left side, we also need to make sure that we have internal rotation on that lead arm because if I don't have internal rotation of the lead shoulder for a left-handed pitcher, and because I have a natural tendency to propel off that left side early, you're going to have a picture that cannot stay back on the left side if I don't have right shoulder interrotation on a left-handed pitcher. So this is actually kind of a big deal and a great question from Nick. And so again, I love talking about this kind of stuff and I especially like talking with you high-level guys that are that are working with the higher level pitchers because you guys get the specificity experience that I don't get because the number of pitchers that I work with on a regular basis are probably four to five year where you guys are getting any number of those guys. So I like talking to you guys.
baseball pitching mechanicsshoulder internal rotationthoracic expansion