[Jeff]

Nuke99

You wrote-: "Study 7-3 in depth .. less ability to push with a pitch elbow .. that's correct.. but doesn't mean a swinger have can't PUSH in the bottom of the swing. the missing piece is the dynamic pivot motion, the arm can't move very far ... can they?"

Why would a swinger want to push at the "bottom" if he has an optimized release of PA #4 and PA #2? If those two PAs are optimally released in a sequential manner then the club is traveling at maximum speed during the pre-impact phase of the swing. How can one increase the clubhead speed by applying a push action in the later downswing? If one applies a push action via active release of PA#1 just before the club reaches the delivery position via pressure at PP#3, then the club could be induced to travel erratically because one will have interfered with the natural physics of the release action. Also, if one can induce the left arm to travel faster in the late downswing via active force-pressure at PP#1, then one cannot have performed the pivot action correctly - because an optimized pivot action should easily be able to provide enough power to catapult the left arm into impact at a sufficient speed (enough power to fully release PA #4)

Biomechanic

I don't think that Chris Welch of Xenolink or the researchers at TPI can measure active release of PA #1 at the bottom of the swing (whatever you mean by "bottom"). I believe that a researcher would have to insert muscle probes into the right triceps muscle to measure its degree of active contraction at the "bottom" of the swing to differentiate between active release of PA#1 and passive release of PA#1.

Jeff.