High speed video is necessary to look at the fast changing parts of the serve. Your 30 fps video only shows one frame during final approach to impact, but 5-10 frames are needed to see the arm and racket changing during approaching the ball.
At 59 sec.
1) Your upper arm between the shoulder joint and elbow is about at 45 degrees to the horizontal. Compare that angle to high level serves.
2) Your elbow has too much flex, about 140 d., at this time of the serve. It should be near straighter. Compare to high level serve.
Golfer's Elbow has been associated with the forehand and the serve. I have not seen details discussed.
I've seen a somewhat similar technique used in a few poster's serve videos. TomT was the first one that I noticed using a similar technique. Some of Bigservesofthand's serving techniques use a similar motion for pace.
Warning from my experience - About 10 or 12 years ago I was experimenting with a volleying technique to increase the pace of my volley. The flex angle of my elbow was about 90 d. When I tried very hard - using active muscle forces and not stretched muscles - I gave myself an immediate Golfer's Elbow injury (in side of the elbow) - on the first or second try. At the time, I had not heard of internal shoulder rotation (ISR) but that was what I was using to speed up my forearm and racket. I believe that the injury occurred because I used the bigger ISR muscles but the resistance to rotation of my forearm and racket's moment of inertia, with elbow at 90 d., was too high and the tendon suffered a tear. I did not see a Dr.
Your elbow angle is not 90 d during ISR, more like 140 d at one point. But in a typical high level serve - when the most forceful ISR occurs - the elbow flex angle might be much straighter and as straight as comfortable at impact. The straighter the arm is the less the moment of inertia of the forearm and racket. With the arm near straight the ISR can produce higher racket head speed and there is less stress on the elbow. I believe that the angle you use increases stress on the elbow in the area of Golfer's Elbow injuries. See high speed videos of high level ATP serves for details and safe examples of techniques.
Don't practice that technique until you understand the nature of the timing of the elbow angle in the 30 milliseconds approaching impact. I've posted many times on this part of the serve with many pictures and videos.
You need high speed video for feedback on this issue as ISR before impact lasts only about 30 milliseconds.
You should also view the Todd Ellenbecker video "Rotator Cuff Injury". Join Tennis Resources for 3 months to view the video.
Great post thank you, I will record 2 of the serves in slow motion 240 FPS next time I check my serve progress.
I sustained a GE injury attempting too many push ups, pull ups, and assisted dips when I was too heavy and too weak.
When I had GE it was painful to wash my face and to hit flat serves or serves in general, I have completely rehabbed it fortunately.
I don't like clickbait. But I like the doggy. The serve is okay. OP if you're serious you should hire a real coach instead of soliciting advice on TT.
Ah sorry force of habit on the clickbait xD
I am serious but I consider myself my coach, and I sift through the information in this forum and apply what I believe will help me reach my goals.
I’ve worked at clubs before teaching clinics, camps, and also basic lessons to kids, and of the 10 coaches I’ve come to known, only 2 had knowledge outside the basics.
The best coach I know is Paul Kobelt, his oldest son is rank 500 atm, youngest son is playing d1 at Osu, and daughter is rank 600 doubles I believe.
. That was in
