Why does my team plays in the worst lit sprotcomplex of Belgium :(

Started 3 months ago | Discussions thread
Chas Tennis
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Re: Why does my team plays in the worst lit sprotcomplex of Belgium :(
In reply to Philip Kendall, 1 week ago

Philip Kendall wrote:

Cyl3X wrote:

......................................................................................

If you know then just the sholder can rotate over 1000 degrees in 1 second

I'm not convinced by that though. 1000 degrees is just about 3 full rotations, which doesn't seem likely in a second. I suspect this is more likely to be a typo though.

Professional baseball pitchers have very high shoulder rotation rates measured at about 7500°/sec. Tennis servers roughly 3000°/sec. These are internal shoulder rotation rates of the upper arm, a rotation of the shoulder joint or glenohumeral joint as defined in kinesiology. It's like a twitch and cannot be seen by eye.

glenohumeral joint-

http://www.youtube.com/watch?v=vG1XQkj3Yx0

The 'shoulders' themselves - that are most obvious to see - are rotated by the spine and feet, etc.. They move much slower.

Chas Tennis

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