6-B-1-D Extensor Action -- Whose Your Friend?

[Yoda]

Originally Posted by lagster

hcw, Yes, the action of the right arm, is what keeps the left arm stretched and extended, or "straight." In SWINGING, the left arm is like a rope. In HITTING, the left arm is more like an ax handle, but ideally there should still be Extensor Action present.

This is correct in the context of Homer's recommendations, but limits the player to a large pulley stroke. Small pulley players such as Howell, Couples, and Mickelson do not use extensor action, but have relaxed trail sides to allow the narrow downswing.

[Bold by Yoda,]

Sorry, MJ, we are at odds here.

Extensor Action is present in all great Strokes, Sweep Releases (Large Pulley Wheel) and Snap (Small Pulley Wheels). This is true whether the Stroke is driven by Centrifugal Force -- passive Right Elbow -- or Muscular Thrust -- active Right Elbow.

The 'narrow' Downstroke you refer to is simply the Straight Line Delivery Path (10-23-A or C) as enabled by the Hip Action (Standard or Delayed per 10-15-A or B) and its Hip Slide (per 10-14-A or B).