Keep shaft pressure for longer straighter drives
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- Опубликовано: 5 сен 2024
- Keep pressure on the shaft for longer straighter drives.
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The information at 3:10 has never been voiced in any lesson I’ve had or seen on line. Most informative!
This is fabulous teaching, it gives me a great swing thought. I can’t wait to try this at the range. The conscious thought of resisting and stopping the club head overtaking is gold - as that’s my main miss - big draw left, and if can eliminate that then I’ll be in heaven.
JT... best driver video I've watched. Having someone to demonstrate the moves in stop motion gives my brain time to digest the information. Excellently done !!!
Wow Jonathan, I must say you finally showed and explained in detail, the sequencing on the down swing..... where all body parts should be during the downswing, impact and follow through. You keep impressing me with your insightful demonstrations of the golf swing. Thank you very much for all that you do to help us play better golf. Cheers from Canada.
I enjoy the technological side of your teaching
Great lesson. I never thought of left arm resistance to the right arm extension. Makes so much sense.
I liked the left-hand resisting & right-hand straightening. Never thought about nor ever focused on that side! thanks again!
If this isnt the best golf teacher in the world then I dont know who is!! 👋🏼👋🏼👍🏼👍🏼👍🏼👍🏼🏌️♂️🏌️♂️🏌️♂️🏌️♂️🏌️♂️
Will you be in the Americas or the Caribbean anytime soon, coach?
Jonathan, thanks for revealing and beautifully articulating perhaps the most profound maxim of a great golf swing.
Glad you enjoyed it
@jonathantaylor fantastic presentation ... I know you concentrated on the driver but IMO this applicable to other clubs too ...
Yes, exactly the same.
intereting ..never heard this left hand resist tip ...will give it a go next range visit
A fabulous explanation and well done Ludwig! I’m 68 and now swinging the best I’ve ever done thanks to you. I’ve only been a subscriber for a month or so but I really appreciate your teaching and the philosophy you base it on. I’ve won two matches this week against much younger men and about the same 12 handicap. Both couldn’t believe how straight I hit the ball and how sneaky long I am off off the tee. . Im a believer! I find this swing is easier to repeat once you have it in mind. Still work for me to do though.
Note that at 2:48 the assistant’s hands are in front of the ball, not good for a driver. The picture-in-picture example is better.
So well explained. Love your teachings!
Awesome!!! Thanks.
You have to keep pressure on the back of the shaft, well past impact....
A it complicated but will try it
I’m having serious issues with over-rotating my wrists in the golf swing. I go from 12 degrees closed to 10 degrees open when I try to compensate. I can’t stop rotating my wrists and it’s getting to the point that I’m going to give up.
Hi, don't do that! Send me a video of your swing down the line and front on and I will take a look. Kind regards
Jonathan
Where are you based? Would like a lesson
Germany😂
Lol a little far away
Johnathan, You are one of the RUclips instructors I avidly follows so I obviously have a lot of respect for your superior knowledge of the golf swing. However, I have a background in dynamics and I don’t think you have the impact conditions right. Dynamic analysis of the forces acting on the grip at impact are not as you describe. You describe an in-plane torque being applied to the grip that would speed up the club head. Dynamic analysis indicates that, for low handicap golfers, the momentum of the club head is being used to to unhinge the wrists and that, as a result, the torque applied to the grip is actually slowing down the club head from about just before the last parallel position. The cub head does speed up in this phase of the swing but this is due to another mechanism involving the large centrifugal force acting along the shaft axis which is a whole different story. I suspect this is why it is important to have loose wrists (wrists that don’t resist or interfere with the unhinging) and not tense up in this phase. What you are describing may be a very valid feeling.
Hi Ted, please send me a link to the analysis you refer to. Kind regards Jonathan
Jonathan Taylor
Have a look at:
pdfs.semanticscholar.org/5f78/0348a8b77f80cc30e75cd04e0ca0272a63e0.pdf
The figures of interest are the blue plot (lead deflection) in figure 2a and the red Ty plot in Figure 3b. In both plots impact occurs at the swing progression value of 1 and the last parallel position will at about a swing progression value about 0.95 (about .05 secs before impact). If you compare the two plots you will see that the lead deflection of the shaft and the in-plane torque Ty applied to the grip have the same shape. This is not a coincidence as, in the dynamic situation, it is the in-plane torque applied to the grip that is causing the shaft to bend so that it has lead deflection at impact.
You can illustrate this by taking your address position with the club head restrained against moving away from the target. Now apply an in swing plane torque to the grip so that the shaft has lead bending curvature (club head is closer to the target than it would be if the shaft was straight. You will see that torque you are applying would slow the club head down in the dynamic conditions at impact.
A similar unhinging of the wrists out of plane (unlocking of the lead wrist) using the momentum of the club occurs just before impact. Compare the red (droop) curve in Figure 2a with the blue Tx curve in Fig3b. Again the two curves have the same shape but are inverted relative to each other due to the sign conventions being used.
Note that from the top of the backswing (as indicted in the Figs) until about the last parallel position the torques being applied to the grip have the opposite sign to what they have at impact. Hence the torques the golfer is applying to the grip before the last parallel position are trying to speed up the club head and result in the shaft having the opposite bending curvature (club head lag and toe-up deflections).
In Fig3b you will see that the torques that the momentum of the club is applying to the hands to unhinge them are about 20 Nm. As as comparison, if you hold a driver horizontally out in front of you the torque that is being applied to your wrists (and trying to uncock the lead wrist) is about 2Nm. Hence the dynamic torques acting on the wrists at impact are about 10 times larger.
Incidentally, in Fig 3a you will see that the force acting along the driver shaft at impact (and pulling the hands towards the ball) is about about 400N. This is a large force and would be about the same as the golfer would experience if he/she was suspending a 40 kg bag of cement from the head of a club (if gravity was reorientated to act along the shaft axis). It is this force that the golfer manipulates to accelerate the club head using lag or lag tension in the later part of the downswing- but as I said in my original comment this is a whole different story.
The reference above does not spell out the above explanation as it is not the focus of the research. Even if you don’t need this help interpreting the reference perhaps some of your followers will find it helpful.
It is still very difficult to ascertain from the data the individual directional forces applied by each hand relative to one another and to the club at any part of the swing. Or am I being dumb? Also what influence other forces(rotational, vertical) created during swing have on the shaft and indirectly on the hands?
Jonathan Taylor I appreciate that is not easy to understand the dynamics of the golf swing if you don’t have a detailed background in dynamics or physics.
The method of analysis in the reference I gave you only gives the combined effect of both of the golfers hands on the grip. However, I don’t think this matters. The components of the grip force exerted by the hands on the grip shown in Fig 3a&b of the reference are all the forces acting on the grip for golfer A. Note that the laws of physics dictate that whatever forces the hands exert on the grip, the grip then exerts an equal (magnitude)and opposite (direction) force on the hands.
Also note that the grip forces are given in the grip reference frame show in Fig 1a so that it doesn’t matter where the club is positioned in space they will be the same relative to the hands.
To simulate the feeling in the hands that the golfer A would experience at the top of the golf swing take your address position with a say 7 iron - move the club head back along the target line until it is aligned with the trail foot. Now push down of the grip towards the heal of the lead foot to produce some lag (i.e. negative lead) deflection of the shaft and a larger amount of toe-up (i.e. negative droop) defection of the shaft as shown in figure 2a at the top of the backswing. If you swing the club like golfer A the feeling you have in your hands (areas of more intense pressure between the grip and your hands) would be similar to what golfer A would experience at the top of the backswing. Note that you have to push down on the grip towards the trail foot (and the grip pushes the hands up with an equal and opposite force).
This force is appropriately the combined effect of the Fx and Fy force components in Fig 3a. the only other force component is the Fz component acting along the club shaft which is not significant at the top of the backswing.
The rotational forces that your hands apply to the grip (and the grip applies as an equal and opposite rotational force to your hands) is the combined effect of the Tx and Ty torque components shown in Fig 3b. The only other rotational component of the grip force is a torque Tz that causes the club shaft to rotate about its own longitudinal axis. You can see in Fig 3b this is insignificant.
If you compare Fig 2a (golfer A) and Fig2b (golfer B) you will see that the pattern of the shaft deflections and hence the torques the golfer applies to the grip differ from golfer to golfer but the pattern and relative magnitude of the components remains similar.
If you experiment a little with the relative amount of toe-up and lag deflection in the above exercise with the 7 iron you should be able to duplicate appropriately the feeling (areas of more intense pressure) you experience in your hands at the top of the backswing.
In Fig 3b you can see that that the torques applied to the grip (and applied by the grip to the hands) at impact (swing progression value 1) have the opposite sign to what they had at the top of the backswing and the Tx and Ty components are approximately equal in magnitude. To duplicate these conditions with your 7 iron, find a piece of furniture with a gap under it close to the ground and place the club opposite your lead foot with the club head restrained from moving away from the target and from moving up. You should then be able to apply a small amount of lead deflection and an equal amount of droop defection to the shaft. The feeling in your hands would be similar to that experienced by golfers A and B at impact. I think you will agree that this feeling is quite different to what you felt when you duplicated the conditions at the top of the backswing. This difference should be obvious without knowing what each hand is doing individually. Do you agree that the feeling in the hands you describe in your video is closer to what you feel when you simulate the conditions at the top of the backswing than those at impact?
By playing around with the relative amount of lead and droop deflection of the shaft during the impact simulation you should be able to duplicate approximately the feeling you have in you hands during the initial part of the backswing up to a swing progression value of about 0.6 (just past shaft vertical when the club head speed starts to reduce - the braking phase required to bring the club head to zero velocity). During this phase the feeling in the hands would be similar to that at impact.
You can see that the Fz force in Fig 3a is very large at impact compared with the Fx and Fy forces you generated during the simulations of the top of backswing and impact conditions. This large force acts along the shaft of the club pulling the hands towards the club head. To understand the effect of this force on the hands think of a piece of string in a vertical plane with 2 straight portions and with a kink at a low point. The upper straight section of the string represents (mainly) the lead arm and the lower straight section the club shaft wth the hands located at the kink. When the club-head tries to pull away from hands (due to the large centrifugal force Fz) the “string” will try to straighten out lifting the hands up (if the hand are not pushing down enough). This is the dominant effect of the linear (i.e. non torque or non rotational) forces on the hands at impact.
Now for a little speculation. The complete downswing with a driver lasts about 0.25 seconds (about the time it takes to blink) and the final phase from last parallel to impact takes about 1/5 of this time. I suspect that the change in grip torque direction during the final phase of the downswing happens too quickly to register in the brain. It is also possible that the hands are being moved by the muscles in the same directions in this final phase as in the earlier phase of the downswing and that even though it is the momentum of the club that is unhinging the wrists it may feel as though the muscles are doing the work.
Understanding that it is the momentum of the club that largely unhinges the wrists helps me to keep the wrists loose during this phase.
I think there is one other practical implication of the data in this research. Note in Fig 3b that the grip torques do not change significantly either side of the “top of backswing” position. This means that the feeling in the hands (areas of increased pressure) should not change from well before the top of the backswing and well into the transition. From my own personal experience this was not the case when I started to learn the golf swing and in fact did not become the case until I realised that the feeling in my hands should not change during this phase. I think the feeling in the hands is not given enough weight in golf instruction. I read that Ben Hogan never wore a glove because it effected the feeling in his hands. I would be very interested in hearing from you what your clients, of various ability, experience regarding the feelings in the hands during the transition.
@@tedblaikie1580 Wow, you will have to give me a few days to get my head around this Ted. Thanks so much for taking the time!!
This guy gets it re pressuring the shaft. Too much complexity in explanation. If you are connected you move to right heel and left toe and done. George Knudsen was classic example. The other point is that shaft lean is created from change of direction and not pulling the handle.