|
Post by imperfectgolfer on Aug 22, 2019 9:04:42 GMT -5
Eric stated that a steeper left arm motion during the backswing will allow a golfer to loop the golf club to a shallower plane during the early downswing and he believes that it will increase swing power. I cannot understand why he believes that clubshaft shallowing will increase clubhead speed. Most long-drive competitors have a steep left arm backswing motion, but they do not shallow their clubshaft during the downswing and they come straight down the TSP. Here is an example featuring Jamie Sadlowski. Note that Jamie's hands are just above the TSP at P4 (image 1) and that his hands only shallow down slightly to the TSP during the downswing. Note that his clubshaft goes down the TSP during the early (image 2) and mid (image 3) downswing and that his clubshaft is still on the TSP at impact (image 4). Most long-drive competitors use the same technique where they do not shallow their clubshaft during their downswing action. Jeff.
|
|
|
Post by dubiousgolfer on Aug 22, 2019 10:07:01 GMT -5
It looks like Eric Cogorno has different opinions about the right leg extending in the video below and is claiming many golfers do this in the backswing (ie. Adam Scott, Hideki Matsuyama, Jordan Spieth, Justin Thomas).
DG
PS. Just wondering if he making an error when he looks at the knee positions from a DTL view . Isn't there some rotation of the knee in the backswing which accounts for the differences he is claiming from address to P4?
Just found this AMG video which states that on average Tour players exhibit an average about 3 degrees loss in knee flex in the backswing
|
|
|
Post by imperfectgolfer on Aug 22, 2019 10:55:19 GMT -5
It looks like Eric Cogorno has different opinions about the right leg extending in the video below and is claiming many golfers do this in the backswing (ie. Adam Scott, Hideki Matsuyama, Jordan Spieth, Justin Thomas). DG PS. Just wondering if he making an error when he looks at the knee positions from a DTL view . Isn't there some rotation of the knee in the backswing which accounts for the differences he is claiming from address to P4? I disagree with some of the opinions expressed by Eric in that video. First of all, he implies that all pro golfers lose their right knee flex to a significant degree during the backswing. I believe that his claim is not true, and I believe that some pro golfers, who have a more limited pelvic rotation during the backswing (eg. Rickie Fowler), have very little change in their degree of right knee flex during their backswing. I agree with Eric that straightening the right knee allows for a greater degree of pelvic rotation during the backswing action, but a straightening right knee does not necessarily cause a significantly large elevation of the right hip joint if the golfer uses a left-loading pelvic motion (rather than a right-loading pelvic motion) during his backswing action. Arnold Palmer used a left-loading pelvic motion during his backswing action.
I have drawn a vertical red line midway between his feet. Note that his pelvis is shifted targetwards at his end-backswing position, which means that he slanted his right thigh towards the target while he straightened his right knee. That left-loading pelvic motional pattern will decrease the degree of right hip joint elevation happening secondary to a straightening right knee (for a given amount of pelvic rotation).
Eric also claims that pro golfers are actively pushing off their right foot during their later downswing. I disagree, and I suspect that the elevation of the right heel off the ground is more likely to be a passive phenomenon and that the rotary motion of the right hemi-pelvis is often more passive (and not necessarily active) between P5.5 and impact in many pro golfers - especially if they are front-foot golfers (like Luke List) who get >80% of their weight-pressure measurement (overall COP measurement) under the lead foot at impact. I think that reverse foot golfers (like Justin Thomas) are more likely to be pushing off their right foot during their later downswing.
Regarding the Granato video, it is not surprising that the amateur golfer (who has a larger degree of pelvic rotation during his backswing) will take longer to get to a hip-squaring position during his downswing. Granato implies that the amateur golfer's loss of clubhead lag at P5.5 is due to a slower pelvic rotation during the downswing, but I suspect that a lack of an active "right arm adduction maneuver combined with a pitch elbow motion of the right elbow" plays a more significant role in his loss of clubhead lag. Jeff.
|
|
|
Post by dubiousgolfer on Aug 22, 2019 17:58:15 GMT -5
Many thanks Dr Mann
DG
|
|