I am interested in your opinion as to which of these two graphs represent the "correct" body sequencing in a body swinger.
Graph 1
Graph 2
The first graph is the result of research by the TPI researchers and they claim that the arms/shoulders/pelvis rotate at roughly the same angular speed in the early downswing (before the end of the early downswing = lead arm parallel to the ground) in an excellent golfer. By contrast, the second graph implies that the hips rotate well before the shoulders and that the shoulders only start to rotate when the pelvis has reached about 50% of its maximum angular velocity. This graph also claims that the shoulders have roughly equal speed to the pelvis when the pelvis reaches its maximum angular speed. A third implication of the second graph is that the degree of torso-pelvis separation increases in the early downswing - because the pelvis is rotating while the shoulders are not rotating. This is in contrast to the TPI researchers result. Here is another graph from the TPI researchers - who have used high resolution (6-degrees of freedom) motion sensors (at 200 frames/second) to resolve exactly what happens in the early downswing.
This graph shows that the shoulders are actually moving at a faster rotational speed than the pelvis in the early downswing, which means that the degree of torso-pelvic separation must be progressively decreasing in the early downswing.
So - which graph depicts "true" reality for an excellent body swinger?
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