Here is a detailed explanation of the pelvis and thorax kinematic sequence curves from TPI 3D, focused around transition. They display how transition occurs and there is a lot of information that can be gleaned from them. They relate directly to the spine rotation graph also. So for TPI 3D techies here we...
I recently attended the annual track and field summit that included sessions on sprints, hurdles, throws and jumps. I especially enjoyed the seminars by Dr. Ralph Mann on sprint mechanics. Here are some of the main points that I picked up. Ralph emphasizes “front side” mechanics rather than “back side” mechanics. It is a...
Back in 2000 my colleagues and I wrote a paper where we showed that an increase in the X-Factor at the beginning of the downswing seemed to be more important that the X-Factor itself. We called this the “X-Factor Stretch”. Jim McLean is well known for his teaching of the X-Factor and has also...
In order to create maximum speed of a distal segment or implement, the principle of the kinematic sequence (a.k.a kinetic link) shows that each body part, should accelerate then decelerate in a sequential manner. For the golf swing, to achieve maximum club speed, the sequence is pelvis, thorax (ribcage), lead arm, club shaft. This...
Here is a short article in Wired Magazine Online. It talks about the project I am working on with BMW and Track and Field. BMW engineers developing software for a 3D camera with the goal to track the athletes running velocity. This will help us do performance testing on a regular basis. http://www.wired.com/playbook/2011/10/us-track-and-field-and-bmw-join-for-olympic-push/
The biomechanics of twisting somersaults has always been an interesting subject to me. I am currently coaching Trampoline and Tumbling, and my daughter Jenny is one of my athletes, (Air Sports Unlimited, Scottsdale, Arizona). Quite often I can’t resist doing something myself. Last weekend I watched one of my gymnasts try a Rudi (1...
My article titled “Measuring Basic Performance Parameters from Video: A Tutorial with Sprinting as an Example” was published yesterday in the US Olympic Committee’s online magazine called Olympic Coach. The article describes how to put together a very inexpensive analysis system comprising a high speed video camera, a Windows laptop and a powerful but...
After day one of the US Open I was interviewed for an article asking if there is a perfect swing in golf. I had a chance to talk about TPI, the AMM system and 3D analysis. Rory McIlroy was ahead after the first round and looked like a shoe in to win it (and he...
My wife Bridget and I have created eye-catching posters using the beautiful patterns of human motion. We call them “The 3D Motion Art Series”. I believe these posters are unique, I have not seen anything like them on the Internet. They come in many different colors and the first release is focused on the...
I saw this picture in my recently received USA Diving magazine. What an amazing pike position! This is interesting biomechanically, for two reasons; 1) Moment of Inertia – I recently discussed how to make a somersault spin rapidly and here is the picture perfect example. I don’t think a pike could be any tighter...
