[Jeff]

Yoda - when I stated in post#30 that the right arm throw action induces a centrifugal release of PP#2, I was thinking that TT meant that the right arm throw occurs via the active release of PA#1 and that it substitutes for PA#4 as a force causing the left arm to move in space. Then I imagined the release of PA#2 occurring via simple centrifugal forces - due to the fact that the left wrist/hand eventually moves in a tight circular direction at some point in the downswing (as if moving around a small radius pulley in HK's endless belt analogy). In other words, I was not really implying that the "right arm throw" was acting as a trigger to trigger the release of PA#2. I was thinking of the "right arm throw" as a power stroke that moved the left arm, and I thought of the release of PA#2 as occurring automatically/passively according to the principles of the endless belt principle. In other words, if a swinger moves the left arm in space down-and-out towards the ball, PA#2 release occurs automatically (without being triggered). That's why I remain confused by what is meant by a "right arm throw" being a trigger for the release of PA#2 in a swinger's action. I also cannot understand how a "right arm throw" works differently (from a biomechanical perspective) when it acts as a trigger rather than a power stroke. Surely, both require the same biomechanical action - an active triceps contraction => active straightening of the right elbow (which is definitionally my understanding of what is meant by the term "active release of PA#1").

I remain very confused!

Jeff.