When I first tried 'levering' I was amazed when I saw the video and realized the release was perfect pro level on video despite my every effort to not let the club release. Now that I'm back to something similar with Bertholy (while still completely IMA BTW) it was time to consider not just the fact that it works but HOW it works.
My hypothesis about this is that the motion is well 'constructed' to optimally use muscles at certain points but then have those muscles become less effective later so that release happens. Like some other sports in this regard, the worse thing you can then try to do is to actively release.
When you look at the Bertholy sequence of trail side upper body muscle engagement in the downswing you start with the master move and both the curling action of the trail arm and the engagement of the lats and pecs to move the elbow down. When the trail elbow gets to it's lower position it is no longer in a position to retain wrist cock. So the most powerful muscle group engaged at the beginning of the downswing to 'retain' has been effectively taken off line in that function.
From this point you only have the curling force of the trail arm resisting the release of the club. This force becomes considerable as the club and the arms move faster.
Whether due to overloading due to speed or overloading due to energy transfer (from stopping you body movement in impact position), the club begins to move our releasing the wrist cock. Once this starts:
1) COAM will cause deceleration of the lead arm
2) the trail arm (side?) with it's own inertia will accelerate the release
3) as your trailarm extends it is in a position where the biceps is less powerful and so applies less force which accelerates the release
These 3 things present a 'chain reeaction' that completely overcomes the retaining force. You get Bertholy's flywheel explosion.
An interesting hypotehsis and possibly a guideline for data for a Mandrin model.
For Joe: from our previous discussions on positioning the 'Impact Unit' - If you position it with body movement (weight shift and catch on lead leg with supported lead arm) more than arm movement, it's easier to get to the right place and with the pre-release Impact Unit intact. The 'catch' overloads it and causes release.
For me it now back to learning to more consistently NOT release.
