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Old 01-04-2013, 09:04 AM   #49
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Join Date: Jun 2012
Location: Fort Lauderdale, FL
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Originally Posted by Chas Tennis View Post
When I look at your first video

At 14 sec, around impact, which is hard to see, I would say that the angle between your forearm and your upper arm is much larger than 15, guessing roughly 40. Also, your upper arm may have a more forward angle to it relative to the line between the shoulders.
Yes, I think this is much closer than my original guess. But I think that contact is happening during the 15 sec interval. The angle between forearm and upper arm is continually decreasing during the swing, and I now guess it to be between 30 and 40 degrees, which, apparently, is producing no inordinate stress on anything.

Originally Posted by Chas Tennis View Post
Keep in mind also that the camera is showing you a 2D projection of the 3D space so things can be deceptive, especially shortened, etc.. What camera and frame rate were you using and can you set a faster shutter?
Sony Cybershot, 30 fps is the max I think. Yeah, better camera and multiple perspectives would be good.

Originally Posted by Chas Tennis View Post
Anyhow, some serving technique observations for you to research.
Thanks Chas Tennis.

And returning to your OP, I was a little worried that I might be doing a waiter's tray position on some serves, but apparently it's fleeting enough when it happens that it's not a problem. I guess it might be a problem if I had a more modern style serving motion, but I doubt that I'll ever be able to do a good modern style serving motion.
66 yrs, NTRP-based, 3.0 in Tennis League Network ( Play mostly at Hardy Park near downtown Fort Lauderdale.
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