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Posted: Dec 12 2007, 04:40 PM
Joined: 12-December 07
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I just have a general biomechanics question in regards to pitching a baseball.
My assumptions are that the Joint Reaction Force at the shoulder is going to be bigger than at the elbow (obviously). I'm also assuming that the torque at the elbow is the same at the shoulder.
That being said... I'm looking at motion in the sagittal plane
Max torque is seen at 0 degrees and 180 degrees (so when the arm is abducted and max internally rotated so the palm is facing down and forearm is parallel to the floor and again when the arm is abducted and max externally rotated so the back of the hand is facing down and the forearm is parallel to the floor).
I've been told that when a pitcher is externally rotating his torque is going to decrease so it can't be causing injuries in the shoulder.
But from what I've seen most pitchers max external rotation is 180 degrees so wouldn't that mean there really is max torque on the shoulder and this torque could hurt cause injury?
I'm not sure if that makes sense, but if anyone knows what I'm talking about I can use some input