2022-01-04 Kwontum Physics: Torque, Part I on Dr Kwon Golf

[@Antonyosb]

A relatively small amount of the KZbin golf community will ever watch this video, too busy watching Rick Shiels post another review on a driver that does exactly the same as its previous incarnation a year before. This is knowledge, I have watched plenty of ground reaction force videos before but this really explains the WHY they are important.

[@drkwongolf]

Haha, spread the good news for me!

[@DD-jx9jd]

a relatively small amount of these viewers are going to take this information to help them get better. A video detailing of a reactionary force "torque" created by swinging a club isnt going to change the world lol.

[@rokstern7042]

And an even smaller amount will understand it and then again a smaller amout of us will actually be able to use it. I think the reprogramming video series is awesome for the average golfer, this part of the channel is more for us who are really big enthusiasts. Oh Dr Kwon, "my" pro has already subscribed to your next seminar, can't wait for him to tell me what he learned.

[@serpent689]

Yes but I think not everybody can understand the explanation of Dr Kwon. You must have studied Mechanics to follow his comments. I like the way of Dr Kwon try to explain golf swing from a scientist angle. Don't spent too much time to watch Rick Shieds, Clay Ballard and many others. They say interesting things but it's always the same. They turn around the subject and make you believe they have a new subject.

[@aaronschultz4057]

Finally, objective and pure science with the effect of displacing a plethora of myths and pseudo science infused into golf instruction. I am an ardent student of the game, an accomplished golfer, and am genuinely grateful for your most substantial contribution to our game. The beauty is, one cannot credibly argue with what creates speed and increased forces in the swing, though how its accomplished will always be contentious to a degree, analysis should sharpen and focus the process. Dr. Kwon, I am thankful and most interested in your content, and I am sure many others will be as well.

[@rikodesinko]

Dr. Kwon, I'm so glad you started a channel. I'm learning so much thank you!!!!

[@amarug]

As a mechanical engineer and golfer this is exactly what I was looking for. Thank you so much, really interesting and it all makes perfect sense!

[@docchu69]

Thank you for the wonderful lecture. Please continue uploading lessons and lectures !!

[@mattwilsn]

you are a god amongst men. ive learnt more about the golf swing by bingeing your videos over the last 2 days than i have in the entire 30+ years ive been playing golf.

[@pieman2010]

Have watched and read a lot of golf content but this is the best explanation of GRF/torque I have ever seen. Fills in some gaps for me. Thank you for taking the time to share this knowledge. Would love to see more videos like this, especially an explanation of how the body torque is transferred to the club, and how the arms/hands work.

[@VirtualAdam]

Thanks for posting these great videos, your providing a level of insight on the golf swing that is has not yet been provided by anyone else. Much appreciated!!

[@robertmitchell176]

I have watched the 1-2 and three steps and a full lesson so far. This is the most important golf instruction and information I’ve ever seen. I’m posting this for my golfing community. I have been a two or three handicap most of my golfing life. In the first year I took up golf at almost 50 years old I was a five handicap within one year. Why, because I just use basic skills and a good coordination. I used kinetic energy based on my baseball swing. Moving the ground force horizontally keeping the back to the target the ball and then turning the hips through. As I said I was hitting it farther and better and all my golfing buddies and betting friends were amazed. Then I thought I would get better quick bye reading golf books and particularly Ledbetter. It was an enormous mistake as I spent countless hours on positions. I never got much better than a five handicap and actually got a little worse and then better only when my short game improved dramatically. Since then I’ve been going back-and-forth with different concepts always thinking about kinetic motion and energy build. Finally, I have watched Dr. Quan presentation and information. Now I understand how to create energy from the ground up and most specifically how to move and create the energy from one foot to the other. I know the information seems a little technical but it is very fundamental, proven and Important to all serious golfers. So if you are coordinated, have some flexibility and want to improve dr. Kwan‘s instructions may be the answer. By the way, I never post but I feel that this information is important. Best. And thank you Dr. Kwan, I just wish I could come there for lessons.

[@nikhilbk1]

Thanks for starting a channel, Dr Kwon. This is some really good content.

[@t3golf]

This content is so cool. Thank you for taking time out of your schedule to do these videos. .

[@MegaGolfingnut]

Dr. Kwon, Thank you for taking the time to share your knowledge and explaining. Can you explain how you lengthen the moment arm and at what point does this happen?

[@simmo5071]

Moving the push up force to the lead foot if the ground force is equal on both feet the moment arm will be closer to zero

[@michael_somers]

Amazing lecture! Learning so much. I watched once but will continue to study this. Thank you so much Dr Kwon! Looking forward to next lecture on GRFs

[@rockyrabboy]

Thank you Dr Kwon for sharing these knowledge, I have been following your work and I was finally able to understands your concepts due to this youtube Chanel. God bless you for your work and contribution to the golfing community. Love from VietNam!

[@troyweis3218]

I have been totally geeking out on Dr. Kwons videos for the last 7hrs. I have not gotten any work done. Such good information to see. Will be implementing the 3 stages to my daily swing sessions.

[@kg1128]

Thank you Dr. Kwon. 1) at top of backswing, how can we maximize inclination of pressure, by pressuring more on the instep of trail foot? 2) middle of downswing/p5, to maximize torque, move COP forward relative to COM (lengthen moment arm) and increase pressure on lead foot (increase magnitude) - would this be correct application to maximize torque?

[@jnbowerman]

Thank you Dr Kwon. Two questions if you would be so kind. Firstly, can you please explain the best way to increase the moment arm for the frontal plane (POR)? For example, more turn and force in the backswing and then upward force on the front foot in the downswing? I'm not clear on the concept of horizontal = larger and vertical force = smaller at 12.50 in the video and how this relates to the unweighting discussed at 20.30. Second question. How do you increase forward shaft lean using these concepts? I have been able to increase my student's clubhead speed but not forward shaft lean at impact.

[@tonebassin2571]

Thank you for starting a channel. This so helpful...

[@Tateclipz2011]

Thanks for clarifying all of the swing pressures. It helps a lot in the entire golf swing!

[@robsaxepga]

It helps to watch this twice lol. I think I get it. I'm a data/science guy so this is great. I really like how you combine this with the flow of the motion. That's very helpful. Thanks Dr. K!

[@Murf1802]

That's was unbelievably educational, learned more In that video about golf swing force's then I've learned my entire life!! very well done ,thank you for sharing your knowledge!!

[@anthonysharpe9908]

been using this swing motion in my last three games. feels good. i have back issues and have found that this swing helps in relation to less strain making recovery for me much better. distance also improved but more importantly accuracy. thank you for your work

[@bobflitton6430]

Awesome starting to understand how important ground forces are in the golf swing and when to apply it

[@robertlozano6546]

Dr Kwon. The comparisons really helps to understand the efficiencies. I appreciate the movement pattern. How does it relate to controlling the low point?? The ultimate functional outcome.

[@antonmurphy1]

Thank you Dr. Kwon for all the information you are now providing to golfers who are genuinely interested in learning and understanding the golf swing. There will be a significant number of golfers where your explanation on torque will evade them due to the technical nature of your presentation. May I suggest that using a 3 D model of indeed a real life golfer to clarify your meaning to those of us who are not scientific in our background but non the less want to better understand your insights.

[@markmatthews6839]

That makes my head hurt. I’m not sure how to use this info. But I AM going to work on that Step Drill with continuous motion. THAT I can understand. 👍🏼

[@ronkisslingxie958]

Wonderful. But can you summarize it and give the best recommendations?

[@tedblaikie1580]

As someone who specialised in structural dynamics as they apply to seismic engineering I find your application of the same concepts to the golf swing helpful and illuminating. Hopefully a companion video on the equally important ground torque about the vertical axis as shown in your 3D stickman figure will follow soon. I would be very interested to know how much the inclination of the axis of the the total ground torque varies during the swing and if this is related to how “smooth” the swing is. Presumably if this axis is varying a lot there would be out-of-balance forces that would need to be absorbed by the golfers inertia and make the golfers swing less “smooth”.

[@golfpro835]

Dr Kwon, thanks! Best explanation ever! How can we create a larger moment arm? Based on this representation, where is the swing speed at maximum?

[@johnguillaume5919]

I love the detail you are sharing. I can’t say that I understand it all but can’t wait to try a few things.

[@jokkealtonen6383]

Very nice illustration! I’m excited to put this information to use. Thank you very much!

[@Omnis2]

Wow I spent the whole video watching the white portion and then I see Dr. Kwon up there in the top right at the end. Lol, Hi! Thank you for starting a KZbin Channel!

[@DavidParas]

Hey Dr. Kwon - thanks for making these - from doing some KOT training and the rope swing I increased my swing speed 35mph over the past 8 months. It's on my to do list to make it down to your training facility, but I was wondering if were possible to do a virtual swing analysis? I think I still have a lot more power I can put into my swing.

[@drkwongolf]

Congrats! Unfortunately, I don't have virtual and video-based service. It is just too much for a university professor whose main job is to struggle with the undergraduate and graduate students. ^_^

[@antoniom5440]

Thank you so much for sharing Dr. Kwon. This is really top stuff

[@snooker1972]

Like these biomechanics videos. Think it also highlights the importance of initial set-up. A lot of golfers have their legs too straight at set-up, so can’t push the ground properly to move their their body. It also clarifies the pushing down & out with feet well, I couldn’t really get my head around that before 😂

[@drkwongolf]

What is more important than the initial set-up is how to break out of the stable set-up position and start the BS actively.

[@thomasterpager]

Another great video - where, I gaining an understanding of the forces in the golf swing - THANKS

[@LennySteinberg]

How does the position of the hands affect the torque? if the hands pass close to the body at the impact position, does it increase the swing speed and torque? For example, when an ice skater spins, she pulls in her arms to go faster... does pulling in the hands, arms and club close to the body at impact have the same affect in the golf swing?

[@JonathanTaylor63]

Excellent explanation! Thank you.

[@danf2588]

Great analysis. How does one optimize the golf swing to maximize the Moment arm.

[@yveslangisch5061]

Thank you so much - deepest insight into the golf swing you can get. Understanding these videos there is no need to subscribe to any other golf channel. There is one point though that I do not understand completely. How is the force transferred to the hands/club? The torque getting from the GRF forces the pelvis (COR) to rotate clockwise (BS) and counter-clockwise (DS). Simplifying things and consider the upper body as one big block the rotatry force equally affects the hands/club. I'm wondering if it's only these few centimeters of pelvis rotation that have such a huge effect on the club head speed?

[@Petrovitz1]

Very interesting and helpful. I tried to adjust my hipmove and -turning accordingly. It's not easy but it works very positiv. What about the TORQUE in the upperspine und shoulders during backswing and downswing when they transfer the torque established through best-using the groundforce as explained in the graphs by you? Is there more information to come from you? Looking foreward to your feedback. Thanks so far and best regards. Guenther (sorry for my english)

[@williamstocker8161]

It looks to me like a lot of torque is generated from the long moment arm of the left arm around the shoulders as the COR. Is this correct? My next question would be what can the golfer do to increase the torque generated by the pelvis shift and ground reaction force. Thank you.

[@adamsaunders9876]

As a more senior beginner golfer aged 55, that suffers from a sore back at times do you think it's worth my time learning to generate more torque as won't this just lead to more lower back problems for me?

[@phettaepolchantara8122]

thank you . dr.kwon

[@blairrobertson8183]

Very interesting presentation and noteworthy that you revealed the model player to be Grant Waite, who was considered a model for the Stack and Tilt system.

[@drkwongolf]

This was his swing in 2015 and he was not a S&Ter anymore.

[@blairrobertson8183]

@@drkwongolf I would be interested in knowing what changed. Is it simply a matter of allowing pressure to move into the right side? The part about Grant Waite’s spine angle seems to be a major part of Stack and Tilt - the extension of the spine as the shoulders turn and tilt. .

[@DavidKaplow]

@@drkwongolf Grant Waite is player A? Who is player B? Thanks

[@richgrisham]

Thank you, Dr. Kwon.

[@김현정-q7g6g]

권 박사님, 2년차 골린이에요 ㅋㅋ..이런 영상을 접하게 해주셔서 감사합니다. 그간 올려주신 영상을 계속 반복해서 시청하고 연습하고 있어요.오늘 연습장에선 'elongating the moment of arm'에 대해 고민해 보겠습니다.

[@drkwongolf]

Step drill로 자동 해결되니 고민 안 하셔도 됩니다~

[@loopghost]

Phenomenal breakdown. Awesome

[@tlim1945]

Very good lecture. Question is how to increase d moment distance?

[@tv-qj8zf]

박사님 안녕하세요 저는 대구에 있는 이대한 프로 라고 합니다 박사님 덕분에 골프에대해서 몰랐던 부분들을 많이 배우고 갑니다 정말 신기하네요!! 저는 시합때 항상 훅이나서 고생했는데 이부분을 최대한 적용 시키면서 연습해봐야겠습니다 이런 소중한 정보를 유튜브에 공유해주셔서 감사합니다❤❤

[@drkwongolf]

네, 반갑습니다~ 훅이 자주 나면 대체로 스윙평면이 너무 in-to-out으로 형성되어서 그럴 가능성이 큽니다.

[@tv-qj8zf]

@@drkwongolf 감사합니다 박사님~ 백스윙을 적극적으로 하면서 쉬프트 턴 할때 몸이 위로 올라오면서 언 웨이팅 하는 느낌이 드니까 In-Out 덜 나오더라구요 저 세미나 신청도 했습니다 줌으로 뵙겠습니다 ^^

[@jeffreyanderson5106]

For me ( my mind understands and appreciates this knowledge)this is excellent science… though for most it may be overwhelming/ confusing and not understandable… until they have enough experience to understand. Keep up the good work Boss

[@RK-ig5hy]

Dr. Kwon, thanks for your explanation. Can you answer this question: how does the width of stance affect the ability to shift the center of pressure, and affect the moment arm--D/E/F--which you discuss at ~16:00? I tend to have a wide stance, and though it feels stable, I have a feeling it is only restricting.

[@drkwongolf]

When the stance is too wide, it actually limits the pelvis motion because the ground reaction forces are too much inward laterally.

[@davidb6981]

Dr Kwon, would it be possible to get a working program or at least a model we could login to to see this motion in a constant slow loop. This is helpful but I found it interesting that the pelvic bones don't seem to slide very much side to side and if I could see the whole movement in super slow motion I could get a better feel. When you teach the movement there seems to be much more lateral movement in the pelvic bones.

[@jonchadwick1171]

I realize that you teach Shurn. That to me means horizontal and rotational. What about vertical force? I would think the sequence would be shift, turn, and push down to include vertical ground force. Correct me if I'm off base

[@drkwongolf]

The vertical rhythm (push-unweight-push) is the backbone of the swing rhythm and the shurn rhythm is added to the vertical rhythm.

[@frednegus7017]

That is a good explanation of how the forces work within the pivot ( work ). Do you next have a video on how that work is gathered up and multiplied into power by the arms and club. The goal as you know is to multiply your force through mechanical advantage ( efficiency) and to NOT simply add effort. Good video and explanation. I note your graphic model shows very little if any linear travel ( sliding ). I was also interested to see the movement of the spine during the pivot ( axis tilt : the main body ). Thanks for your work. Cheers F

[@drkwongolf]

I have a lot of biomechanical topics to share. They will come as we go along. ^_^

[@XiaoLongBao-pr7ve]

Hi Dr. Kwon. I'm wondering how much does the torque when COP is inclined the most to create the longest moment arm but have lower force contribute to the final clubhead speed, compared to the torque generated when the vertical force on lead foot is at maximum but with shorter moment arm. What are their contributions to final clubhead speed in terms of percentages? For example, torque at COP max inclination makes up 70% of clubhead speed and the push from lead foot makes up 30%, etc. To put it another way, which torque is more important in generating clubhead speed that we should be focusing on creating?

[@drkwongolf]

The total change in the angular momentum is equal to the angular impulse on the body. The angular impulse is the time integral of the torque. You cannot say how much torque is coming from a particular peak torque as what matter is the overall area under the torque-time curve.

[@scottclements694]

Hi Dr Kwon. As a Physics teacher and avid golfer I love your stuff. Wondering if you can clarify something for me. Swing Catalyst measures torque, thrust and vertical forces too. I believe the torque displayed by the swing catalyst is calculated around the vertical axis and is the sum of the products of the friction forces on each foot multiplied by their distance to the C of M. Is this correct? Your torque presented would be around the Z axis then? Is your torque the product of only net vertical force multiplied by its perpendicular distance? Or is it the total ground force, i.e. the vector sum of friction and the vertical force times its respective distance? I would guess your torque and the swing catalyst torque peak at similar times. Is this a reasonable guess? Just curious to compare the swing catalyst data from other videos to you findings and how to measure/estimate your torque using swing catalyst data. How would twisting of the rear foot, ie.e counter clockwise from the golfers view, versus pulling the ground straight back (i.e. along the negative Z axis) be picked up or measured by your system or Swing Catalyst?

[@drkwongolf]

Yes, the torque provided by Swing Catalyst (3D plate version) is the torque about the vertical axis. I also compute this. I further divided this to two parts: pivoting torque and foot contact torque. Pivoting torque is the one generated by individual foot GRFs about the combined COP and the foot contact torque is the sum of the ground reaction torques directly acting on the feet by the ground. The torque used to show the concept of torque in this episode is about the forward/backward axis. This is the sum of the torques generated by the individual foot GRFs about the COM but is also equal to the torque generated by the combined GRF about the COM.

[@scottclements694]

@@drkwongolf Thanks for the reply. So the torque you are showing in this episode is tilted, and is presumably close to the swing plane, and not solely in the xy plane because you are using the total GRF (includes vertical, thrust, and friction) to calculate it. Is this correct? When you say forward/backward axis do you mean the axis coming out of th screen?

[@llaw999]

Thank you Dr. Kwon for an informative video! Hopefully you will make a video discussing how to create more inclination of the centre of force. My understanding is the unweighting and lateral “fall” towards the target would do the trick?

[@drkwongolf]

To generate more inclination of the GRF arrow at the top of BS, the right foot has to push the ground down and outward good during the BS. Horizontal rhythm!

[@jimthomas1759]

Quite interesting video. So this torque acts on the body causing rotation of the hips. And then faster hip rotation translates to faster ball speed, I suppose.

[@kevinclelland8017]

WOW like being back at school 😩 but what a GREAT lesson…..

[@keithspicer9374]

Dr Kwon what's the most effective method(s) of extending the moment arm from the COM ? For example is recentering one of these methods during the BS?

[@albertshahn]

This is incredible and thought provoking. I have a question: Since torque is a function of moment arm + force/pressure into the ground (and thus the GRF), it seems that the much maligned stack and tilt method might be a way to create torque more simply - because you do not have to "time" the shift of force to the ground from trail foot to lead foot. The key would be that you would have to keep your weight center back (i.e. by keeping the head/torso behind the ball) to maximize a long moment arm until after impact. Is this correct? 감사합니다 교수님^^

[@jackflash8756]

Dr Kwon - when I look at time point 8:49 in your video , I don't think M=d.F is equal to the torque in the frontal plane. I'm assuming F is a vector in 3D so it might be piercing the frontal plane when viewed from another angle. Wouldn't you need to find the component of M= d.F that is causing rotation in the frontal plane?

[@drkwongolf]

The force in question here is the force projected to the frontal plane. I used the symbol F but the actual force that you see is the projected force. Sorry for the confusion!

[@jackflash8756]

Many thanks

[@philk4645]

so if i understand this roughly you can increase the moment arm by applying more grnd force to your trail leg causing a shift toward the target - the horizontal grnd force component lengthens and overall grnd force would tilt more and lengthen the moment arm … roughly?

[@drkwongolf]

Yes.

[@philk4645]

@@drkwongolf thanks!

[@myeasytek3407]

12:08 I dont understand increasing the horizontal force? You draw a little red arrow with a horizontal force vector, facing the target. The only way I can conceptualized this would be to feel like you have a momentum that wants to carry you away from the target as you get to the top of the backswing and the red force arrow you draw is the ground (or friction) that reacts against this momentum and keeps your feet stationary. If it were frictionless, a push from the lead leg at the statt of the backwing would actually push you away from the target. Is my interpretation accurate?

[@drkwongolf]

A large horizontal GRF toward the target means a hard push to the ground in the away direction using the trail foot. This large toward GRF can be generated easily by moving the body in the away direction initially and pushing the ground to slow down the away motion. This push slows down the away motion and eventually move the body toward the target afterwards.

[@dw1077]

Hi Dr. Kwon, is it possible to share a similar analysis from a perpendicular plane? I am curious to how much those force vectors at the feet push away from the ball. Thank you for sharing your work.

[@drkwongolf]

I will come up with another one with the down-the-line view.

[@dw1077]

@@drkwongolf Thanks! Look forward to it. I saw another video that mentioned that some high speed players push a considerable amount with the lead foot towards the ball to create torque.

[@jgb6802]

So the key, besides staying centered by keeping a straight spine, recentering and doing the vertical pushes at the right time, is to push off the right foot towards the target while preventing the pelvis from sliding towards it? (Gankas with an earlier push?) And: So only the hereby accelerated vertical rotation of the pelvis/COM matters?

[@drkwongolf]

The push should be downward and outward by the trail foot in the BS and the lead foot in the DS. The easiest way is to take steps outward: Stage 1 of the two-step swing drill.

[@jgb6802]

Thank you!

[@pureimpact24-7]

Dr. Kwon, do you have to maintain moment arm distance throughout the whole downswing or is it something you create in the back-swing and then it releases in the downswing? I learn so much! TY

[@drkwongolf]

It changes as the swing progresses. Watch the 'Torque' episode.

[@steveperry1344]

dr. kwon, i watched and listened but my comprehension of the info was low, kinda like me reading the golfing machine book many years ago. i mean no disrespect, it's just a bit over my head but i will watch a few more times.

[@davidj5625]

I could be missing something here but I'm much perplexed by your presentation. If the centre of mass or moving COR is akin to the nut in the first illustration, are you saying the length of the moment arm affects the speed at which your pelvis rotates? If so, does this imply faster pelvic rotation is what determines the swing speed? And what would be the determining factor in golfer A that would create a longer moment arm than that in golfer B? Said another way, why is the ground force further from COR in A's swing? Thanks.

[@drkwongolf]

The moment arm is about the whole body COM, not the pelvis COM. The key in Player A's motion is active horizontal interaction with the ground. That is why his horizontal force is large and the force arrow shows more inclination. Do not just stand in the middle of the stance but actively push the ground outward and develop lateral motion of the pelvis.

[@davidj5625]

Ok, I'll need to give this more thought to get my head around how the principle applies in golf swings. Perhaps I would need to understand what you teach in your other vids. Thank you.

[@davidrobsonuk]

I love the content, but I’m a bit confused. We seem to have a ground reaction force operating in the x and y dimensions (ie a combination of forces that are operating vertically and towards the target), but to get the pelvis to develop angular acceleration we need a force in the z dimension (ie pushing the left side of pelvis away from the viewer). So how do our forces generate pelvis acceleration?

[@drkwongolf]

I have not talked about the torque generated about the vertical axis yet. You also need a good amount of torque about the vertical axis. It is coming soon. The way the golfer uses the ground in the frontal view is actually what differentiates a golfer from another. The torque pattern about the vertical axis is fairly consistent among the golfers.

[@jeffreyanderson5106]

Good job boss!

[@guitar1950]

My non-scientific brain struggles to follow all of this. Therefore, I will simply do the step drills and the rope drill as instructed by Dr. Kwon. I know they will help to ingrain the proper movements. I just received my 3/4" 7 foot rope today. Hopefully there will be some live demonstrations using golfers who swing a golf club properly with Dr. Kwon explaining what is occurring with those golfers and how it relates to this presentation.

[@michaelsliwinski8044]

Hmmm. Interesting but surprising to me that no discussion of the forces etc provided by upper body, shoulders arms wrists and hand has been discussed here.

[@drkwongolf]

It is not possible to accurately measure the force provided by the upper trunk, shoulders, arms, wrists, and hand as these body parts for a closed chain in golf swing.

[@Reapswtf]

I'm a little confused, how is the moment arm measured? Is it all just the movement around the centre of his hips, with his muscles making it rotate, which makes it the force?

[@drkwongolf]

The moment arm in question is the one generated by the GRF about the whole body COM, not about the pelvis center. The GRF is caused by the muscle actions. Watch the GRF episode, please.

[@Reapswtf]

@@drkwongolf just watched kzbin.info/www/bejne/hni7qah3iJaGmck - makes much more sense now. Brilliant, thanks. Keep it all coming, it’s truly amazing understanding this and knowing how pushing into the ground will affect my swing speed through torque.

[@nickcampbell8619]

wtf man! This is a problem! Not only does this video only have 55,505 views, but it looks like I am the last one to comment on it (9 months ago). This video should have 25 MILLION VIEWS. When I was 18 I used to swing my driver at about 104 mph. Now I'm 40, and I can get my swing speed up to 120mph using Dr. Kwon's step drill. This might be the most useful piece of golf information I have ever seen/read in my life. Do you think Albert Einstein knew that by unweighting at the top and getting the ground forces to incline toward the target, he could generate a long moment arm and create maximum torque in the downswing? I feel like if he knew that, he would have given up on his theory of relativity and study of quantum physics and found a way to play on the PGA tour. He must not have been introduced to the step drills.

[@drkwongolf]

Haha, spread the gospel!

[@stevemiller7460]

that was awesome thank you!

[@daviddonofrio3229]

So what in your step drills increases Inclination force,and what keeps the COP back from the lead foot?

[@drkwongolf]

The COP stays close to the trail foot at the top of BS because the force acting on the trail foot is greater. The force arrow inclines toward the target when you push the ground good in the away direction. Stepping with outward push suffices both.

[@jdrobison1967]

What is it that GW does that Player B doesn't do to create the horizontal force that results in the greater inclination of the moment arm? And can Player B use other torque forces for power that he doesn't get from GRF torque, or is GRF torque that much more dominant than the others?

[@drkwongolf]

GW interacts with the ground in the horizontal direction well but Player B does not. The only way one can generate external torques acting on the body is to use the ground. No other way.

[@robertlozano6546]

What is most efficient way to generate horizontal forces then?

[@drkwongolf]

@@robertlozano6546 Pushing the ground outward (opposite to the target direction) and generate an inward reaction.

[@gtubemanor]

Don't we want maximum torque at impact? thanks.

[@drkwongolf]

Nop!

[@maralvor]

These are terrific help videos Doctor! Thanks very much for making them available -a real treat! BTW Are any of the written materials made available at your seminars etc able to be purchased remotely from you digitally? (I like to note almost all the research I come across on line, so digital info is extremely useful) Regards Ian

[@drkwongolf]

I have golf biomechanics certification courses (Level 1 and 2) which will come with PDF course books. The next round will be in March-April.

[@AndrewWilmot]

@@drkwongolf Looking forward to your golf biomechanics courses 👍

[@robertlozano6546]

Dr Kwon, What causes a good unweighting phase?

[@drkwongolf]

Unweighting means the vertical GRF is smaller than your body weight. In reality, as long as you have stepping-like rhythm (vertical rhythm) in your swing, you will automatically have good amount of unweighting. Unweighting normally occurs at the end of an upward motion (upward deceleration phase) and at the beginning of a downward motion (downward acceleration phase). So as long as you have rhythmic and continuous up-and-down motion, you automatically repeat active push and unweighting.

[@garrymajor7528]

Mac Ogrady and grant Waite video together shows Mac at the beginning of the downswing taking a little more time to start downswing with this stepping like rhythm.thanks for this Grant Mac favourite Jodie Mudd.

[@Omnis2]

9:20 It can't be Phil or Fred with those stick figure calves

[@Omnis2]

Oof sorry Grant.

[@tinytoons2517]

감사합니다, Thank you, gamsahabnida, I hope its spelt correctly.

[@nickcampbell8619]

I am 40 years old...where were you when I was 12? lol...Awesome video!!

[@drkwongolf]

I thought golf was not a sports 28 years ago when you were 12. I started playing at your current age. Lots of regret now!

[@nickcampbell8619]

@@drkwongolf Well seems like we've traded places then haha, cuz I live in Korea, too. I've been here for about 15 years. Please let me know if you are ever back in Korea so I can come see you to lengthen my moment arm...seriously. 레슨비도 드리고 한턱도 내드리겠습니다...and keep the awesome videos coming

[@drkwongolf]

@@nickcampbell8619 I visit Korea at least twice a year. I had to cancel the winter trip this time due to the mandatory quarantine. Next summer for sure!

[@nickcampbell8619]

@@drkwongolf Perfect! See you in the summer then. Just let me know where I have to go and what clubs to bring.

[@jeffreyanderson5106]

OK let’s start over that has to be a bolt. If it were a nut the center shaft doesn’t turn it’s a bolt turning and turning into a hole

[@DeronSizemore]

Who is a good example of a golfer with a long moment arm ?

[@drkwongolf]

I have Grant Waite's 2015 swing and it is a good example.

[@DeronSizemore]

@@drkwongolf Thanks!

[@jimmystewart58]

I’m not the smartest so could you explain how someone achieves using it best

[@drkwongolf]

This is the foundation of what I do with the golfers. Frontal plane mechanics makes huge difference. How you interact with the ground changes the magnitude of torque generated.

[@jimmystewart58]

@@drkwongolf I gotcha the exercises you do achieves this. One question does everyone have a limit ie their fastest swing speed they can produce or with work can you keep increasing it I’m 60 and average 100mph thanks

[@rayfrosti7849]

Who is your favorite golfer?

[@drkwongolf]

Grant Waite

[@rayfrosti7849]

@@drkwongolf Thank you. Learning a ton from your videos. Very appreciative.

[@markmatthews6839]

Dr. Kwon, there is a great instructor that you should team up with. Club Pro Guy! I’d love to see the affects of increased torque on the punch out game.

[@j.d.7050]

Looks like Rory.

[@drkwongolf]

Grant Waite 2015!

[@jacob.loszynski]

Guten tag

[@jackuzzi5251]

🤣🤣

[@Iversonwings1]

I honestly learned nothing from this lol

[@drkwongolf]

Sorry to hear that. Be open-hearted! Otherwise nothing will make sense if it is very different from the info you commonly encounter.

[@Shankaporomous]

Go see a pga teaching pro, to improve your game… in golf there are not short cuts, you either learn the fundamentals, or just get use to hitting bananas and boomerang shots, or not get off the tee box at all. If you are serious about getting better, this is the worse you want to waste your time in. But if you are on the other spectrum, those who have 20 things on their head, before hitting a golf shot this is for you.

[@danf2588]

Great analysis. How does one optimize the golf swing to maximize the moment arm.