[biomechanic]

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.