2022-03-12 Kwontum Physics: Torque, Part 3 on DrKwonGolf

#Kwonified #KGRANDIOSE #TWU #Kinesiology #Biomechanics

[rsmsurge]

This makes so much sense. What a visual. Thanks Dr. Kwon

[danf]

Based on this very insightful analysis of toque generation in the golf swing, I’m thinking of switching from spikeless to spiked golf shoes!

[tedblaikie]

Dr Kwon. You often tell your students to “kick the ground” at the end of the pressure shift and start of the downswing. Which torque are you trying to get them to generate - the one about the horizontal or vertical axes or both axes?

During the downswing the horizontal ground force component acting away from the target line on the lead foot and acting towards the target line on the trail foot are approximately the same magnitude (as they must be for a pure torque). In my golf swing I am only conscious of the force acting on my lead foot. However, like most golfers on slippery ground I have experienced the trail foot sliding away from the target line so I know there is a significant horizontal force acting there. Is there an explanation of this or is it just the feels not real again. I appreciate that the horizontal force that can be generated on the trail foot depends on the vertical force acting (friction) but I am more interested in knowing if I should be conscious of the horizontal force acting on the trail foot perpendicular to the target line to the same extent as on the lead foot.

[frednegus]

The secret may be in the dirt but it is definitely in the SHURN.

[michael_somers]

Love it! My takeaway here is to keep the ratio. That is if I want to generate more speed I need to increase the moment arm on the frontal plane (use the ground well). This will give more opportunity to rotate faster with the upper body without exceeding the proper ratio. Thank you Dr Kwon!

[kathybaxter]

Not understanding how to create the frontal torque. Love his bio mechanical approach to the golf swing, I find it far superior in terms of improving my ball striking than swinging to positions.

[guruowner]

Hi Dr. Kwon, could you discuss foot pressure and trace for a fade vs. draw biased swing in a future video? Thank you in advance. Kind regards from Europe.

[Wayneswingtips]

If frontal plane torque is the limiting factor, is the reason why Rory (for example) has a big squat in transition to create large vertical forces that help him increase the frontal plane torque?

[robsaxepga]

What I'm getting is there's two ways to swing in this example. Is the non-productive use of force available detrimental beyond swing efficiency? Great series of videos.

[vchan]

For iron shots, will be better not to be aggresive with upper body rotaton during downswing so ratio wont be greater than1. Otherwise it end up the swing will be out to in and and also release the club earlier?

[vchan]

Deeper swing plane encourage in to out swing and errand shot will go to the right and shallow encourage out to in and errand shot will go to the left!

[jackflash]

Mz is the horizontal torque about vertical axis going through the COM . Shouldn't this just be the sum of each foots GRF component in the horizontal plane multiplied by their individual moment arm distance to a vertical axis through the COM? I cannot understand how you can change the vertical axis to go through the COP and then say Pz forms the majority of Mz which is about an axis going through the COM. How have you determined Mz in your graphs?

[jcjcjcjc]

좋은 영상 감사합니다. Chip shot의 경우 지면을 이용한 frontal plane 상에서의 torque보다 pivot을 이용한 horizontal plane에서의 torque가 주가 되지 않을까 싶은데 혹시 데이터가 있으신지 궁금합니다.

[robertlozano]

Dr Kwon
Could you ID your plane terminology as it relates to x, y, z axis please. Thank you

[vchan]

What would make the club release (unhinging)earlier more? Deeper swing plane?

[vchan]

I just wonder if deeper swing plane limit the vertical torque which would result a better contacts for all clubs?

[johnk.atchley]

In your reprogramming sessions, are you enabling players to increase their vertical torque (counterclockwise rotation around the red axis) simply by pushing against the ground and straightening the lead leg (left leg for right handed player) at the right point during the downswing? Does that come about automatically if the player gets into the right rhythm? It is difficult and confusing to try to think about executing the three different torques during the two or three seconds it takes to make a swing. Also, you show long drive star Borgmeier doing a drill or exercise in which he exerts almost exclusively horizontal torque (counterclockwise rotation around the green axis). Is there a similar drill in which almost exclusively vertical torque is exerted? Would that involve swinging the arms on a very upright straight linear plane while focusing on pushing against the ground and straightening the trail leg on the backswing, then unweighting and then pushing hard against the ground and straightening the lead leg on the downswing? Would it be useful to do the two drills to separate and isolate the two types of torque in order to get a better feel for using the body and understanding the different motions? Thanks.

[vchan]

The cause of shanking was a result of incomplete wt shift and hip not able to rotate, forced to push toward the ball? Also vertical component will take over!

[arjanpetersen]

So @15:00 that red line is a result of your lower body rotation ?

[vchan]

If wt on the backfoot during downswing, vertical component took over and spining as a result and cause the ball to go left?