Attached are clips to demonstrate the movements I refer to in my posts. Feel free to ask questions.
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Wrist/Forearm movement clips
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Here are the rest...
Eversion and Inversion are usually used to describe the movement of the ankle joint, However there seems to be analogous movements possible at the wrist joint so I included them.Last edited by EricMatuszewski; 11-16-2006, 10:08 AM. Reason: adding explanation of Eversion and Inversion
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Inversion and Eversion are used to describe movements of the ankle joint.
The analogous movements at the wrist joint would happen when the hand was in a hyperextended position (as in the clip).
It's generally understood that very little motion occurs in this way in the wrist (it's partly axial rotation which is usually more dependent on pronation and supination of the forearm) so the application of ankle movement terms to describe wrist movements is unconventional.
These wrist movements are very small (less than 15 degrees).
It seems though that when a weighted lever such as a racket is gripped in the hand and thus exerts a torque on the wrist joint, especially during a torque amplifying movement like a tennis stoke, such Inversion/Eversion like movements are much more likely.
These movements are also all somewhat dependant on each persons particular wrist genetics and age. Ranges of motion are somewhat individual for each player. Some may Invert/Evert more other less.Last edited by EricMatuszewski; 11-17-2006, 05:11 AM. Reason: Correcting language, improving Clarity
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Downloading issues
I did a test to see If I could download them on different PC's.
They download fine on my Mac but not on my Sony, I made the clips on a Mac, but I don't know why that would make a difference.
Maybe, Maverick can give some suggestions as he seems to understand the intracasies of computer uploading and downloading better than I. Sorry for the frustrating tech problem, the clips are actually very good.
Eric
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pronotion.mov
What do you need to see pronotion.mov
I have clicked and does NOT work for me
juliantennis@comcast.net
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Loading
Originally posted by EricMatuszewskiSorry Julian,
I just checked it and it downloads fine on my end. Let me know if you get it to work this time. So you got the rest to download, but not this one?
I'm not really a computer expert, and I use a Mac so my PC skills are few.
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Download
Originally posted by EricMatuszewskiSorry Julian,
I just checked it and it downloads fine on my end. Let me know if you get it to work this time. So you got the rest to download, but not this one?
I'm not really a computer expert, and I use a Mac so my PC skills are few.
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Wrist movement
Originally posted by EricMatuszewskiInversion and Eversion are used to describe movements of the ankle joint.
The analogous movements at the wrist joint would happen when the hand was in a hyperextended position (as in the clip).
It's generally understood that very little motion occurs in this way in the wrist (it's partly axial rotation which is usually more dependent on pronation and supination of the forearm) so the application of ankle movement terms to describe wrist movements is unconventional.
These wrist movements are very small (less than 15 degrees).
It seems though that when a weighted lever such as a racket is gripped in the hand and thus exerts a torque on the wrist joint, especially during a torque amplifying movement like a tennis stoke, such Inversion/Eversion like movements are much more likely.
These movements are also all somewhat dependant on each persons particular wrist genetics and age. Ranges of motion are somewhat individual for each player. Some may Invert/Evert more other less.
the wrist forms the INVERTED LETTER V so it is MUCH MORE THAN 15 degrees
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download
Originally posted by EricMatuszewskiAttached are clips to demonstrate the movements I refer to in my posts. Feel free to ask questions.
at the different location
for example
the location given below in a poist by Jon Yandell works:
Look at this image of Federer:
http://www.tennisplayer.net/members...io nFront1.mov
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