The descriptive designations of Rotator and Thruster came directly from TPI's Dr. Greg Rose and his interaction with a handpicked team of TGM instructors in a day-long meeting last year. He told us TPI had made the distinction based solely on personal observation of the respective motions.
When we explained the TGM concept of Hitter versus Swinger, there was a collective "Aha!" from their assembled group. Their research had picked up on the two decidedly different Shaft stresses in the Downstroke -- radial versus longitudinal, i.e., back of the Shaft versus top of the Shaft -- but they had no idea what was causing the phenomenon.
I don't have access to any definitive information as to their stats on this subject. It was all new to them, and they had not yet done anything with it. We were told they would do additional work reconciling their ideas with ours and get back to us, but so far . . . nothing. And we've not pushed it.
What TPI does not want known is that the Thruster does not produce the same results or data on their 3-D machine as the rotator. Their buzz word of today is the kinetic chain and how to snap it better for more club head speed. The truth is a thruster on that 3-D machine would not produce the results they want to market their program so MUMS the word on thrusters.
I have done many tests with a k-vest and I know it is not their $100,000 3-D machine but it will show measurements that are consistent when measuring the kinetic chain. I also have a friend who has a 3-D CAD machine and I developed a working device that measures the down swing thrust and torque of a thruster on the handle of the club so I know of the mega power produced in thrusting.
Last edited by purehitter : 09-02-2008 at 02:42 AM.
What TPI does not want known is that the Thruster does not produce the same results or data on their 3-D machine as the rotator. Their buzz word of today is the kinetic chain and how to snap it better for more club head speed. The truth is a thruster on that 3-D machine would not produce the results they want to market their program so MUMS the word on thrusters.
I have done many tests with a k-vest and I know it is not their $100,000 3-D machine but it will show measurements that are consistent when measuring the kinetic chain. I also have a friend who has a 3-D CAD machine and I developed a working device that measures the down swing thrust and torque of a thruster on the handle of the club so I know of the mega power produced in thrusting.
Pure Hitter,
The K-vest have never been tested for accuracy the kinetic chain the K-vest provides isn't accurate.
The reason I say this is hips speed, shoulders speeds are measured at the joint centers of the hips and the shoulders.The sensors for k-vest is in the centre of the hip and the upper body is centre of the spine, how can this possibly give accurate hip and shoulder speeds, the sensors are at least 3inches from the each joint centre on the hip and shoulders. So this doesn't give true speeds of the hips or upper body.
We have compared K-vest and a 6dof system on the same person, your would bee horrified how inaccurate K-vest is.
Also the guy I undertsudy under, helped to start inter grading K-vest and he pulled the pin due to it never being tested and was inaccurate.
K-vest in the end was done by computer designers not biomechanists.
Also for T.P.I they use a Pholhemus system and the accuracy is very questionable, they can't accurately measure joint centres, they place sensor inches away from joint centers of the hips and shoulders, they also use a kinematic sequence which is ignore the law of motion.
T.P.I or K-vest T.P.I wouldn't fit homers work cause homer lives with in newtons laws, the same as other 3D analysis's companies who use the kinetic link which also use newton laws.
I would stick yo guys who work off kinetic link this meshes in with homers work.
Last edited by biomechanic : 04-21-2009 at 10:00 AM.
This wouldn't fit homers work cause home lives with in newtons laws, the same as other 3D analysis's companies who use the kinetic link which also use newton laws.
He has a medical history that would frighten most guys shitless and has fought his way through it in a manner that not many could have.
Bio knows his subject even though he has a bit of a struggle with the written word. So, a little patience and a touch of respect would not go amiss.
Thanks burner,
Sorry boys missed a few words.
To be honest I'm sick of people like T.P.I misleading the public.
Homers work rocks and his work stays within the newtons laws (physics).
The kinetic link is newton's law which is conservation of momentum and a few other body motion laws.
Kinematic means to ignore the laws of motion.
If you want to research listen to guys who work with Kinetic link if your a homer deciple, they mesh together.
Thanks burner,
Sorry boys missed a few words.
To be honest I'm sick of people like T.P.I misleading the public.
Homers work rocks and his work stays within the newtons laws (physics).
The kinetic link is newton's law which is conservation of momentum and a few other body motion laws.
Kinematic means to ignore the laws of motion.
If you want to research listen to guys who work with Kinetic link if your a homer deciple, they mesh together.
OK . . . . whew . . . . I thought you were one of the dudes we needed to set straight. Thanks for clarifying.
How has this denomination of rotators vs thrusters changed the way you teach?
Has this changed the way we look at zone 1 for hitters- I know the book denotes the pivot for hitters as a slide and a turn for the swingers, but is there any drills we can do to sense the small differences between the swing and the hit pivot(rotating vs thrusting)?
Are there any differences in the start down between the two?
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