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Post by dubiousgolfer on Dec 1, 2019 8:20:24 GMT -5
Dr Mann
In your chapter "Critical Update: How to Optimally Rotate the Pelvis during the Downswing" you mentioned the below:
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Biomechanics of the pelvic motion in the mid-late downswing between the P5 position and the P7 position (impact)
By the end of the hip-squaring phase, the lateral pelvic rotator muscles are significantly contracted (shortened) and they can no longer play a significant role in rotating the pelvis counterclockwise during the mid-late downswing. So, a relevant question arises-: Which muscles cause another 40 degrees of counterclockwise rotation of the pelvis during the 2nd phase of the "left hip clearing action" (during which time period the left hip joint moves increasingly towards the tush line in a counterclockwise rotary manner)? I believe that a few major muscles play an important role in causing the continued counterclockwise rotation of the pelvis during the mid-late downswing - the i) left knee extensors and ii) the left gluteus maximus muscle and the iii) left adductor magnus muscle.
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My question : Wouldn't active muscle contraction of mid-upper torso muscles internal/external obliques from P5-P7 also passively assist the rotation of the pelvis (especially if the golfer is weak in those major muscle areas you've stated above points 1-3)?
DG
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Post by imperfectgolfer on Dec 1, 2019 10:35:20 GMT -5
Dr Mann In your chapter "Critical Update: How to Optimally Rotate the Pelvis during the Downswing" you mentioned the below: -------------------------- Biomechanics of the pelvic motion in the mid-late downswing between the P5 position and the P7 position (impact)By the end of the hip-squaring phase, the lateral pelvic rotator muscles are significantly contracted (shortened) and they can no longer play a significant role in rotating the pelvis counterclockwise during the mid-late downswing. So, a relevant question arises-: Which muscles cause another 40 degrees of counterclockwise rotation of the pelvis during the 2nd phase of the "left hip clearing action" (during which time period the left hip joint moves increasingly towards the tush line in a counterclockwise rotary manner)? I believe that a few major muscles play an important role in causing the continued counterclockwise rotation of the pelvis during the mid-late downswing - the i) left knee extensors and ii) the left gluteus maximus muscle and the iii) left adductor magnus muscle.------------------------My question : Wouldn't active muscle contraction of mid-upper torso muscles internal/external obliques from P5-P7 also passively assist the rotation of the pelvis (especially if the golfer is weak in those major muscle areas you've stated above points 1-3)? DG I can only envisage the upper torso passively rotating the pelvis via the contraction of the abdominal oblique muscles if the upper torso is rotating faster than the pelvis and where the upper torso leads the pelvis, and that does not happen in the early-mid downswing. It can certainly happen in the later downswing and followthrough. Jeff.
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