Post by imperfectgolfer on Jun 22, 2024 12:03:43 GMT -5
In this video, Brendon is using the latest version of HackMotion's device, which apparently has a capture rate that is 8x greater than the older model. That apparently allows the wrist extension/flexion measurements captured at impact to be more accurate. Brendon raves about this newer model and he wrongheadedly thinks that it will allow him to improve his full golf swing action.
Note that Brendon places the HackMotion device on his trail wrist and he he wants to achieve a goal of having the trail wrist extended 15 degrees at impact. Does that make sense? I think that it makes no rational sense and it shows how ignorant Brendon is when it comes to understanding golf swing biomechanics!!!
Brendon, like most pro golfers, uses a pivot-induced TGM swinging action (lead arm swinging action) and when hitting an iron it is desirable to have forward shaft lean at impact, which obviously decreases the dynamic loft at impact and it also results in a more solid ball strike if the sweetspot of the clubface (and not the leading edge of the clubface) hits the ball. To get a desirable amount of forward shaft lean at impact when using a weak-or-neutral lead hand grip, a pro golfer must either have a bowed lead wrist or the lead forearm forearm must be slightly more pronated if a pro golfer has a GFLW (geometrically flat lead wrist) at impact. Both options work perfectly well - Jon Rahm is an example of a pro golfer who uses the bowed lead wrist technique while Henrik Stenson/Scottie Scheffler is an example of a golfer who uses the intact LFFW/GFLW swing technique.
Let's presume that a pro golfer (who adopts a weak-to-neutral lead hand grip) uses the bowed lead wrist technique and comes into impact with a desirable amount of forward shaft lean - as seen in the following capture images of Jon Rahm.
![](https://www.perfectgolfswingreview.net/RahmClubfaceClosingTwo.jpg)
Note that JR has forward shaft lean at impact using the bowed lead wrist technique.
Note that his trail wrist is extended at impact. What determines how extended his trail wrist is going to be at impact? It depends on the complex interaction of a number of biomechanical factors - i) how far his trail shoulder has moved downplane by impact, ii) how far his trail elbow has moved targetwards by impact and iii) how much he straightens his trail arm by impact. There is no "fixed" value of trail wrist extension that must be realized at impact and it is an optional choice because it is not the major causative biomechanical factor that a pro golfer, who performs a TGM swinging technique, uses to get his desirable amount of forward shaft lean at impact.
Consider how Scottie Scheffler looks at impact.
![](https://www.perfectgolfswingreview.net/SchefflerClubfaceClosingTwo.jpg)
SS uses the intact LFFW/GFLW technique and he very controllably rotates his intact LFFW counterclockwise in a biomechanically perfect manner between P6 (image 1) and P7 (image 4) by using a PA#3 release action (which is biomechanically due to lead forearm supination) and that allows him to get his clubface square by impact. Note that he has very little lead wrist bowing at impact and very little forward shaft lean. Note that his trail wrist is far less extended at impact (compared to Jon Rahm) - because of large differences in the i) position of his trail shoulder at impact, ii) the position of his trail elbow at impact and iii) the degree of trail arm straightening happening between P6 => P7. SS is not using his trail arm/wrist to either square the clubface by impact or get his desired amount of forward shaft lean at impact.
It would make no sense for either Jon Rahm or Scottie Scheffler to place a HackMotion device on their trail wrist when practicing their full golf swing action, and Brendon's approach in his video is irrational and it demonstrates how clueless he is when it comes to understanding/performing the type of full golf swing action performed by pro golfers.
Jeff.