Chas Tennis's latest activity

Have you seen the Ellenbecker video "Rotator Cuff Injury" and also some of the forum posts on it? ( It is available by joining Tennis...

I have not noticed Youtube deleting frames of my videos when they video process and create Youtube videos for storage. I have seen...

I believe that arching your lower back has much more risk of injury than arching your Thoracic spine. See videos on what is being done...

That looks like a Phantom or Olympus type high speed video camera. They probably cost $30,000. Notice how small the motion blur is...

It is Thoracic Extension. A term that new people can find by Googling.

View the timing of the 'chest up' in high speed videos. I believe that it is later. Roddick had one of the fastest motions passing...

Just an update on this young girl's development....Sany turned down a full ride offer to Wharton School of Business at Penn to accept a...

When you are able to video forehands in high speed, give hand signals after the forehand to indicate how well it worked and bounced...

Terminology for Types of Serves 1) There is usage, such as it is. Then you have to define your terms each time your use them. 2)...

If you have pain from any new stroke, stop immediately. If something has a tear, its strength is gone and the tear is likely to tear...

Sunlight has about 100 times as much light as indoor tennis courts.

Your iPhone should have high speed video mode? 240? What model is it? It might make large video files unless you have someone to start...

According to instructions in post #23, consider the ball spin vector diagram and how the spinning ball first touches the court. For...

You might have something there. I do not like to interpret extreme motion blurs, streaks, because the video is easily misinterpreted. A...

These tennis researchers show the spin vectors on the ball for a slice, flat and kick serve...