Cheetham on Modeling the Pelvis-Thorax Kinematic Sequence

[lia41985]

Link: My TPI (Titleist Performance Institute) - Your Source for Golf Fitness, Exercises and Health

...it is very important to realize that at no time did the bottom disk “put the brakes on” intentionally, in fact the pelvis spring kept turning as hard as it could the whole time. The reason the pelvis slowed down is because the acceleration of the thorax disk pulled back on the pelvis.

 

[cwdlaw223]

But, But, But, But my video shows nothing slowing down. My eyes can't be wrong!!!

 

[Mike Richardson]

How do you get the feel that the thorax is being released?

the second spring, the one between pelvis and thorax is released. Its action “sling-shots” the thorax, pushing it faster in the downswing, but at the same time due to the action/reaction principle, it pulls on the pelvis in the opposite direction and slows it down.