It would be great to see you do a video short on extensor action.
Good idea, DG. In it I would use this winter-time drill to help students instantly understand the concept:
1. Without a Club and while wearing your long-sleeved shirt, sweater, or windbreaker, pull your Left Arm (only) out of its sleeve.
2. Grasp the end of the sleeve with your Right Hand and stretch it out. That is Extensor Action (Non-Accelerating Thrust #2 / 6-C-0-2)!
3. Now, while keeping your Head still and maintaining the stretched sleeve (Extensor Action), use your Right Arm and its bending Right Elbow to swing the Club to the Top (Right Shoulder High and On Plane). Pause and Feel the Right Triceps continuing its stretch of the lifeless (but now structured!) sleeve.
4. Finally, again while maintaining your Stationary Head and Extensor Action, execute your Downstroke, from the Top to the end of the Follow-Through (sleeve and Right Arm straight). If you use your Pivot and its Right Shoulder (Rotation inducing Body Momentum Transfer) to Accelerate the left sleeve through Impact, you are Swinging using Centrifugal Power (Accelerating Thrust #4 / 6-C-0-4). If you use your Right Arm to Accelerate the left sleeve through, you are Hitting using Muscle Power (Accelerating Thrust #1 / 6-C-0-1). In both cases, the sleeve remains stretched...by the Non-Accelerating Thrust of Extensor Action.
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