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Post by dubiousgolfer on Apr 12, 2020 11:38:43 GMT -5
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Post by dubiousgolfer on Apr 12, 2020 11:43:04 GMT -5
DG, You wrote-: " What confused me is the fact that JS has a strong grip at address so I expected his forearm to show a more 'pronated' reading from P1. I cannot understand how a golfer with a very strong grip can have a supinated forearm at address (unless he has circumducted with left wrist extension combined with ulnar deviation)". I have no difficulty understanding how a pro golfer (who has a very strong left hand grip) can have a slightly supinated left forearm at address if his left humerus is very internally rotated at address. However, what I cannot understand is how JS can have 70 degrees of left forearm supination at address (when the golfer in the KM-video only has ~32 degrees of left forearm supination at address). That's another reason why I question the validity of those JS-3D graphs. Addendum added later: I have made new capture images of JS as seen from a DTL perspective. I have drawn a red line down the middle of his antecubital fossa and a blue line along his left lower radial bone, and that allows one to roughly assess the degree of supination/pronation that exists at P1.2 (image 1), P6 (image 2) and near impact (image 3). Note that his left humerus is internally rotated at P1.2 and that his left forearm is supinated, but the degree appears to be in the range of ~45 degrees.
Note that his left humerus is slightly less internally rotated at P6, and that his left forearm is slightly pronated. Note that his left forearm is slightly supinated at near-impact (image 3), but not as supinated as one would expect because he uses very little PA#3 release action and the back of his left hand is still facing the ball-target line, and not facing the target, at impact.
According to the JS-3D graphs that you posted, JS supposedly had 70 degrees of left forearm supination at P1.2 and 15 degrees at impact, and that amounts to a difference of ~60 degrees. However, if you compare image 1 to image 3, it does not appear that there is such a large 60 degrees of difference in the amount of left forearm supination between P1.2 and P7.
Jeff.
Many thanks Dr Mann - yes it looks like those 3D graphs are very questionable. DG
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Post by utahgolfer on Apr 12, 2020 16:30:40 GMT -5
DG, I see no reason to discard the SLAP book. It is always good to refer back to previous instruction to see the good and the bad. I highlighted Page 106 years ago, but it didn't resonate because I didn't see its application at the time. Had they framed it in getting the low point of the downswing 4 inches ahead of the ball, avoiding hitting fat shots, and improving body rotation and power, perhaps I would have "listened" better. For a player who has a decent move off the ball and backswing load, but who does not re-center, I have struggled getting back to the ball on many occasions. Now, this instruction does resonate!
Jeff, I am also guarded on the overall usefulness of 3D graphs. They definitely need to confirm what we can see (body motion) and illuminate what we can't (exact motion sequencing or timing). If I knew every tracing was recorded accurately, represented exact human motion, and we had comparison data for every tour pro, then this would be ideal. It is surprising that anyone would believe digital data over ultra slow motion visual evidence. I certainly can accept both, but if the digital data doesn't match what we can see, then it's time to collect more digital data because something is probably wrong.
It is also clear that the gears system is not perfect. However, some measurements are obviously easier to measure than others. I assume documenting swing center position and change during the golf swing is relatively easy compared to forearm rotation and club face closure rate from p6 to p7! In addition, one can easily see swing center change during the slow motion video, both with and without reference lines. So, the visual data matches the gears data.
I would also like to address the questions you posed to DG:
Where is the "evidence" that weight-pressure is moving dramatically from the right foot to the left foot during the transition?
An important point is that nothing dramatic should be happening here. A 1 or 2 inch leftward motion of the swing center is subtle and far from dramatic. It can be overdone and underdone, as can all things in the golf swing. It makes sense that a small shift in the swing center to the left will place a little more weight pressure over the left foot. I believe there is weight pressure data to confirm this, and I would expect it to be meaningful.
The other problem is our imprecise static definition of p4, which is based on left arm position. Many dynamic body motions can occur before p4, that some say are part of the backswing and others say are part of the downswing. For example, some could say that the leftward re-centering of the swing center is part of the downswing since the swing center may continue to move left during the downswing until p5.5 in one continuous motion. But, if one looks at the position of the left arm, it is clear that the re-centering occurs before p4 or during the backswing. Others simply call the whole thing the "transition" period. But, I find this a bit confusing as everything becomes too jumbled. This is one reason why I find the Transition chapter in the SLAP confusing to read.
What does it mean to state "without wasting energy"?
Shifting too far laterally (rightward) from p1 to p4 is a classic example of wasted potential energy. Can you think of a worse way to lose potential swing energy than falling away from the direction you are wishing to swing? Likewise, shifting forward too early would also cause a loss of potential swing power. Obviously, a perfect swing center position promotes optimum power.
How does the targetwards movement of the legs/pelvis at the transition cause the upper body to secondarily move in such a way that the club will move forward along the proper swing path?
This is painfully confusing to me, as written in the SLAP book. Yes, the hips can begin rotating CCW as the shoulders finish rotating CW, but this is only about separation, not necessarily about swing center adjustment. Some pros do this early separation move and others don't, and it certainly is not required to re-center the swing center leftwards!
To shift the swing center leftwards is simple and does not require body rotation separation. It is a straightforward leftward shift motion as the upper and lower body rotates, a mere inch or two, and a subtle leftward weight pressure shift.
I agree that this simple move does not inherently and automatically promote a correct arm path. What it does do, though, is possibly give the golfer an increased effective time to organize a proper downswing path. If the player only has a rightward shift to p4, he essentially must immediately move the arms other direction correctly. With the leftward re-centering from p3.5, the golfer's swing center is already moving in the direction of the downswing and this probably makes it easier to get the arms to cooperate and move on a correct path. Of course, this can still be messed up, but I believe it can promote better transition body motion.
How does a movement of the lower body targetwards at the transition cause the proper "fall of the club"?
Obviously, most right lateral bend occurs after p5.5, but a small amount can occur early to promote right arm lowering. I believe the simple leftward change in the swing center makes it easier to right lateral bend that small amount. Yes, CCW rotation promotes right lateral bend the most, but this leftward re-centering probably helps too. Jamie appears to do both. His pelvis definitely move leftward before p4 and he also starts to rotate his pelvis CCW before p4, both promoting a little right lateral bend and a "fall of the club".
Again, many things could mess this up, but it could still promote the correct thing to happen.
How does a movement of the lower body targetwards at the transition cause the lower body to get out of the way of the upper body?
I agree, this is vague. As stated, it makes little sense. There obviously needs to be no early extension, no hip spinning, a proper hip rotation, and a proper kinematic sequence "to get the lower body out of the way". A simple leftward shift to re-center is no cure-all, but it still might provide an anticipatory advantage from p3.5 to p4 to get the motor program primed to do all of the things necessary to get the lower body out of the way during the downswing.
UG
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Post by imperfectgolfer on Apr 13, 2020 12:35:02 GMT -5
UG, You talk of a re-centering move where the pelvis moves targetwards by ~2" and you have also stated that it can be associated with a clockwise pelvic rotation, rather than a counterclockwise pelvic rotation, and you have also stated that it can happen before P4 (during the P3.75 - P4) time period - as happens in Rory McIlroy's golf swing action. However, I think that there is no advantage to performing the re-centering move when the pelvis is still rotating clockwise and I do not believe that it must mandatorily happen before P4 (as the SLAP authors recommend when they state that the pelvis should shift-and-rotate while the upper torso and clubshaft are still moving clockwise between P3.75 - P4). I think that it is perfectly acceptable, and actually perfectly rational, to delay the re-centering move to after P4 and to simultaneously combine it with a counterclockwise pelvic rotation - as seen in the following two superb PGA tour golfers.
Johnny Miller Image 1 is at P3.2, image 2 is P4, image 3 is at P4.05 and image 4 is at P4.2. I drew red lines alongside the outer border of his thighs at P4. Note that the pelvic shift (re-centering move) only really happens after P4 and it is simultaneously associated with a a counterclockwise rotation of the pelvis. Jack Nicklaus - when young Image 1 is at P3.2, image 2 is at P3.6 and image 3 is at P4.
I have drawn red lines alongside the outer border of his thighs at P4. Note that his pelvis continues to rotate clockwise between P3.2 and P4, but there is no targtewards shift of the pelvis (re-centering move) happening in his late backswing action.
Image 1 is at P4, image 2 is at P4.2 and image 2 is at P4.8. I have drawn red lines alongside the outer border of his thighs at P4. Note that the re-centering move happens after P4 and it is simultaneously associated with a counterclockwise rotation of the pelvis. Jeff.
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Post by imperfectgolfer on Apr 13, 2020 14:30:59 GMT -5
UG,
One of the SLAP authors' recommendations for the "transition move" is the idea that the pelvis should shift-rotate first and that this will increase swing power by generating a finite amount of torso-pelvic separation with respect to the upper torso (= increased dynamic X factor) and that this will produce a stretch-shorten cycle of the abdominal oblique muscles that will cause the upper torso to rotate sooner and faster. However, I think that if the upper torso rotates too soon and with greater power that it will induce an OTT move where the shoulders turn too horizontally and I think that is a disadvantage with respect to your golf swing action. I am increasingly opposed to the idea of a stretch-shorten cycle with respect to the upper torso's rotational action, and I now perceive it to be disadvantageous.
Jeff.
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Post by utahgolfer on Apr 13, 2020 19:14:22 GMT -5
Jeff,
Johnny Miller definitely looks to have no re-centering during his backswing, and I agree it is not mandatory. I can only assume it may be better for certain players to re-center during the backswing, and that it appears to be very common in current PGA pros and in the pros studied by Ralph Mann (lead SLAP author).
Although clearly not mandatory, I can see it as advantageous. I think the less lateral motion there is after p4, the better. If re-centering can occur between p3.75 and p4, then less lateral motion would need to occur between p4 and p7. Fewer moving parts from p4 to p5.5, probably leads to better consistency during this very brief phase of the swing. Focusing only on pelvic rotation and upper torso rotation is much simpler than adding in a certain amount of lateral slide at the same time.
Would drawing a vertical line from the sternal notch to the symphysis pubis (with the line extended to above the head and to the ground) show re-centering better than lines along the hips? Seems like this could show both upper torso and pelvic re-centering, both of which are important to observe.
But, it is still easy to see backswing re-centering by simply observing a slow motion swing:
However, since most current tour pros re-center in the backswing, this is probably something most amateurs should also do.
UG
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Post by imperfectgolfer on Apr 14, 2020 10:36:08 GMT -5
UG, I personally think that you have many misconceptions regarding optimum golf swing biomechanics. You wrote-: " Would drawing a vertical line from the sternal notch to the symphysis pubis (with the line extended to above the head and to the ground) show re-centering better than lines along the hips? Seems like this could show both upper torso and pelvic re-centering, both of which are important to observe." Why on earth do you believe that the upper torso must re-center - either in the late backswing or early downswing. Look again at these capture images of the young Jack Nicklaus' golf swing action (and I think that his golf swing action when he was young was his best-ever golf swing action). He has a rightwards pelvic loading pattern and also a rightwards-centralised upper torso loading pattern. In fact, it may be more accurate to label his upper torso loading pattern a rightwards-loading pattern because his upper torso is angled a lot to the right and his head (and sternal notch) at P4 is above a point on the ground that is under his right foot.
Note that JN does not re-center his head and sternal notch area as he starts the downswing. Why should he? I think that it makes more sense for him to keep his head back and move the pelvis targetwards so that he can acquire more secondary axis tilt. Acquiring secondary axis tilt (+/- right lateral bend) is very advantageous for a driver swing and it does not predispose to a "hanging back" problem or "fat shots". I personally prefer a rightwards-centralised upper torso loading pattern and I know of no advantage to using a vertical-centralised, or a leftwards-centralised, upper torso loading pattern where the upper swing center is pulled back towards the center during the later backswing.
You also wrote-: "I can only assume it may be better for certain players to re-center during the backswing, and that it appears to be very common in current PGA pros and in the pros studied by Ralph Mann (lead SLAP author). Although clearly not mandatory, I can see it as advantageous. I think the less lateral motion there is after p4, the better. If re-centering can occur between p3.75 and p4, then less lateral motion would need to occur between p4 and p7."
We are now talking about the topic of re-centering the pelvis and you imply that it may be better to re-center the pelvis during the backswing, and not during the downswing. I cannot fathom why it would be better to re-center the pelvis (which is mandatorily required if one has a rightwards pelvic loading pattern) during the backswing rather than the downswing (which officially starts when the club changes direction). I think that re-centering the pelvis happens naturally/automatically if one rotates the pelvis counterclockwise using the "right-sided lateral pelvic rotator muscles combined with a left-sided horizontal GRM that is secondary to pushing backwards away from the toes of the left foot" to start the rotary pelvic motion if one starts from a rightwards pelvic loading pattern scenario - as seen in the following capture images of Mickey Wright. Note that Mickey Wright has a rightwards pelvic loading pattern, and a rightwards-centralised upper torso loading pattern, at P4 (like Jack Nicklaus).
Note that she obviously has to shift her pelvis leftwards when she starts her counterclockwise pelvic rotary motion. However, there is no rational reason for her to perform the pelvic shift motion during her backswing, rather than performing it simultaneously as she rotates her pelvis counterclockwise at the start of her downswing. The only reason why it makes sense to start the pelvic re-centering motion during the backswing between P3.75 => P4 is if the golfer starts the counterclockwise pelvic rotary motion during the P3.75 - P4 time period, which is an optional preference that some pro golfers prefer. However, Jack Nicklaus, Johnny Miller, Mickey Wright and many pro golfers prefer to start their counterclockwise pelvic rotary motion after P4, and it makes biomechanical sense to perform a pelvic shift-rotation as one continuous motion. By the way, note that MW does not re-center her upper torso during her downswing action and her head remains stationary - vertically above a point on the ground that is just inside her right foot. Note how she naturally acquires secondary axis tilt combined with right lateral bend between P4 and P5.5.
You correctly noted that many current pro golfers re-center their pelvis during the very late backswing rather than the early downswing. I think that I can explain why that phenomenon happens. Consider Daniel Berger's golf swing action. Image 1 is at P3.75, image 2 is at P3.9, image 3 is at P4 and image 4 is at P4.2.
I drew red lines alongside the outer border of his thighs at P3.9 and you can note that his pelvis shifts leftwards by about 1" between P3.9 => P4. Why does it happen? I suspect that it happens if a golfer has lot of upper torso rotation that continues to torque the upper thoracic spine targetwards between P3.9 and P4 and where there is a secondary element of arch-extension of the thoracic spine happening at the same time due to the large amount of upper torso rotary torque being applied just before P4. That upper torso torque-motion being directed in a targetwards direction will induce the golfer to shift the pelvis 1-2" targetwards just before he settles down into his "squat move". It is possible to conceive of it as a " natural balancing move" where the pelvis shift motion (pelvic bump motion) allows the golfer to better keep in balance just before he initiates a transition into a "squat move".
Jeff.
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Post by utahgolfer on Apr 14, 2020 13:33:08 GMT -5
Jeff,
i personally believe you understand the golf swing very well. And, I agree that the re-centering concepts you related of Miller, Nicklaus, and Wright are fine, however, this does not mean that the SLAP book and AMG video re-centering data and interpretation are wrong.
Many current pros, including Daniel Berger, illustrate a backswing re-centering of the pelvis and upper torso, as illustrated by SLAP and AMG. It is very easy to see in slow motion. There is no smoke and mirrors. And, this is clearly not that hard to measure with the gears system or 3D analysis. It is easy to see and measure, and the digital data confirm it.
This does not mean the backswing re-centering is mandatory, as long as what needs to be done is accomplished in the downswing. But, this isn't the main point. The main point is that it appears that most tour pros do some or most re-centering during the backswing, not the downswing. And, if this is true, then it is valuable to know and to teach.
You would need to show me a host of current PGA pro swings with both slow motion video and digital swing center data that illustrate how SLAP and AMG are in error. I see currently no evidence that they need correction on this topic.
Here is how AMG recommends a given person can roughly evaluate backswing re-centering without the gears system (starting at 14:00).
In addition, doesn't the weight pressure data confirm backswing re-centering (that weight pressure often goes back and forth from the rear to the front foot during the backswing and during the downswing)?
UG
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Post by imperfectgolfer on Apr 14, 2020 17:43:07 GMT -5
UG,
I think that the re-centering technique that is shown in the AMG video starting at the 14 minute time point is only applicable for golfers who use a vertical-centralised, or a leftwards-centralised, upper torso loading pattern, and I do not think it is useful advice for golfers (like you) who choose to use a rightwards-centralised upper torso loading pattern.
Jeff.
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Post by utahgolfer on Apr 14, 2020 18:56:43 GMT -5
Jeff, this is very interesting to me because I have had many issues with hanging back, poor balance during the downswing, and a difficult time completing the swing in perfect balance. In addition, the low point of my iron shot swing arc has never been sufficiently forward of the ball. Yes, I can play decent golf, but we are all searching for a better understanding and a better swing.
I have always thought that most weight pressure should be on the right foot at p4, and then it shifts forward to the left foot during the downswing. But, this appears to be very outdated and not what current PGA pros do.
Here is a recent AMG video discussing proper weight pressure changes (starting at 4:00), comparing a pro vs. amateur pressure shift. This essentially follows the same idea of re-centering at the top of the backswing, we have been discussing in this thread.
It is obviously a good idea to have the weight pressure 50/50 at p4, most weight pressure on your left foot by p5 (75%), and only a minimal increase on the left foot by p7.
Yes, there is variation, and this is not a mandatory weight pressure shift example for every pro, but I doubt any pro displays a weight pressure shift similar to the amateur illustrated in this AMG video. And, it would obviously help any amateur to move closer to this pro model example.
UG
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Post by syllogist on Apr 15, 2020 6:32:07 GMT -5
Hi UG,
I checked myself at the top at the instant I wanted my torso to begin to rotate CCW. As far as I can tell without any measuring devices, it feels like a 50/50 balance. I did have more of my mass rightward during the backswing. I don't think about recentering to a 50/50 to begin downswing rotation. When I recenter, I don't feel any dramatic shift that would require sufficient time to make the shift.
I can only guess that I don't get into trouble (requiring fast lower body movement) because, during the backswing, I want to rotate my torso without a noticeable sway to the right and without trying to rotate my hips. My torso rotation causes my hip rotation, which causes my center of mass to move rightward, but it all feels like I'm not "off center" much at all, which would require a time sensitive movement to recenter. The small movement to recenter to a 50/50 seems instinctual to me in the sense that it is the easiest type of balance to have to begin a fast CCW rotation of the torso. In other words, it would feel awkward to me to begin such rotation favoring more weight on one foot.
I never really subscribed to the advice of turning the hips CW and lifting the left heel to get a sufficiently full upper body turn for those who lacked flexibility because I think it's very difficult to recover the required balance quickly enough to begin torso rotation at the point of 50/50 balance. I'm certainly not a young, amazingly talented Nicklaus!
S
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Post by dubiousgolfer on Apr 15, 2020 7:35:34 GMT -5
Dr Mann
Just a quick question (for accuracy purposes only).
P4 in TGM terms means 'end of backswing' position. Did HK mean the end of the 'clubhead' backswing position or left arm position at end of backswing?
Am I correct in assuming that these 3D graphs where they show vertical lines titled 'Top' is the end of the 'clubhead' backswing? Therefore any avatars they might show for that 'Top' position may not represent a TGM P4 position?
DG
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Post by imperfectgolfer on Apr 15, 2020 9:45:08 GMT -5
Jeff, this is very interesting to me because I have had many issues with hanging back, poor balance during the downswing, and a difficult time completing the swing in perfect balance. In addition, the low point of my iron shot swing arc has never been sufficiently forward of the ball. Yes, I can play decent golf, but we are all searching for a better understanding and a better swing. I have always thought that most weight pressure should be on the right foot at p4, and then it shifts forward to the left foot during the downswing. But, this appears to be very outdated and not what current PGA pros do. Here is a recent AMG video discussing proper weight pressure changes (starting at 4:00), comparing a pro vs. amateur pressure shift. This essentially follows the same idea of re-centering at the top of the backswing, we have been discussing in this thread. It is obviously a good idea to have the weight pressure 50/50 at p4, most weight pressure on your left foot by p5 (75%), and only a minimal increase on the left foot by p7. Yes, there is variation, and this is not a mandatory weight pressure shift example for every pro, but I doubt any pro displays a weight pressure shift similar to the amateur illustrated in this AMG video. And, it would obviously help any amateur to move closer to this pro model example. UG UG, You wrote-: " I have always thought that most weight pressure should be on the right foot at p4, and then it shifts forward to the left foot during the downswing. But, this appears to be very outdated and not what current PGA pros do." I am flabbergasted by your comment that current pro golfers do not have most of their weight-pressure over the right foot at P4.
What do you mean by the term "current" - this week, this month, this year, or this decade? Where did you obtain "evidence" that most of the pro golfers playing in the past decade do not have most of their weight pressure over the right foot at P4? Here is a video showing Jason Day's COP measurements on Boditrak. Note that Jason Day has 95% of his COP under his right foot at P4 with most of it situated under the right heel (which the AMG instructors wrongheadedly state will cause a hip spinning pelvic motion). Here is a video showing Luke List's COP measurements. Here are capture images from the video. The COP readings are in a white font in that light-grey area, but they are difficult to see, so I have repeated the COP readings in a larger white font in the black area.
Image 1 is at his end-backswing (P4) position. Note that Luke List has 80% of his overall COP measurement under his right foot and 20% under his left foot.
Image 2 is when he starts his downswing's pelvic rotation. Note that he has 85% of his overall COP measurement under his right foot and 15% under his left foot.That means that he is actually increasingly weight-pressure loading his right foot as he starts the downswing's pelvic rotation.
Image 3 is fractionally later. Note that he still has 85% of his overall COP measurement under his right foot and 15% under his left foot. Note how much he has rotated his pelvis counterclockwise between image 1 and image 3.
Image 4 shows him reaching the end of his hip-squaring phase, which happens much earlier than P5 in his super-efficient pelvic rotary action. Note that he still has 76% of his overall COP measurement under the right foot and only 24% under the left foot. Here is another example featuring Suzann Pettersen and Grant Waite. Stop the video at the 5:42 minute time point, and note that Suzann Petttersen has 71% of her COP measurement under her right foot at P4 even though she has a very centered backswing action. Watch the video featuring Grant Waite and note that he has an exaggerated leftwards-centralised upper torso loading pattern (suggestive of a S&T golfer), but note that he still has 60% of his COP measurement under his right foot at P4 (see 9:59 minute time point of the video).
Note that it states the following-: "The vast majority of Tour players load at least 80 percent of the pressure into their trail leg in their backswing and at least 80 percent into their lead leg at impact with their driver swing."
You stated-: "It is obviously a good idea to have the weight pressure 50/50 at p4, most weight pressure on your left foot by p5 (75%), and only a minimal increase on the left foot by p7." Regarding your bold-highlighted statement, why is it a good idea to have the COP measurements 50/50 at P4? How can one stabilise the right leg/foot between P4 and P4.5 so that activation of the right-sided lateral pelvic rotator muscles can rotate the pelvis counterclockwise away from the right leg if the right leg/foot is not optimally pressure-loaded? Do you no longer subscribe to my opinions on the value of using the right-sided lateral pelvic rotator muscles to rotate the pelvis counterclockwise during the hip-squaring phase between P4 and P5? Jeff.
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Post by imperfectgolfer on Apr 15, 2020 9:54:45 GMT -5
Dr Mann Just a quick question (for accuracy purposes only). P4 in TGM terms means 'end of backswing' position. Did HK mean the end of the 'clubhead' backswing position or left arm position at end of backswing? Am I correct in assuming that these 3D graphs where they show vertical lines titled 'Top' is the end of the 'clubhead' backswing? Therefore any avatars they might show for that 'Top' position may not represent a TGM P4 position? DG You are correct about assuming that the 3D graphs showing "top" is the end of the clubhead's backswing action. I do not recall how Homer Kelley defined the end of the backswing, but I suspect that it is the same way. Jeff.
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Post by utahgolfer on Apr 15, 2020 14:19:27 GMT -5
Jeff,
Thanks for the input. I learn best by contrasting what I think I understand with new material. I can't remember every weight pressure illustration I've ever seen, which keeps me open minded, but inefficient.
I appreciate being reminded, but I also need more evidence.
Do we have evidence that a 50/50 weight pressure at p4 does not sufficiently activate the right hip external rotators?
Do we have evidence that a 50/50 weight pressure at p4 is not an effective way to rotate the pelvis, since muscles on both legs can be activated to rotate the pelvis?
Do we have evidence that this backswing re-centering concept proposed by AMG and SLAP is flawed, with no exceptions?
Do we have evidence showing weight pressure changes, the kinematic sequence, the right arm adduction maneuver, flying wedge patterns, release patterns, etc. for the current top 100 players in the world?
And, by evidence I mean many examples or data points. I like seeing all available examples, not just those that support our current belief.
Because I believe an 80% loaded right foot at p4 helps to activate the right hip ERs, this shouldn't make me not want to know if a 50% load could work well, too, especially when I have trouble getting off of my right side.
I would like to understand everything better, that is why I want more information and evidence. I don't care who is right and wrong, I want to dig up new information, not to only validate what I already believe, but to correct my mistaken concepts and to add to my knowledge base.
imho,
UG
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