I purchased the truth about golf, messaged/emailed AJ back and forth, and loved our interaction. He responded directly to me at the time, and explained the concept a bit more clear for me. He's an incredible teacher. Thankfully I no longer subscribe to any online golf instruction or concepts learned online because I bit the bullet and took full on lessons with my local Pro. The result has been a drop in handicap from a 15 in June to a 11.7 by November. I now play golf vs golf swing. With all that said, it is an absolute joy to listen to AJ speak as I love his stories and love the science behind his explanations. If anything, to me, for a good discussion, there needs to be balance, and AJ does just that. Keep up the good work. Looking forward to the next videos.
This channel goes from strength to strength. This guy asks the questions that we would ask. Lets people talk at exactly the right times and asks sensible questions.
Found AJ in 2003 after years of frustration and futility. What he says is absolutely the truth about golf. I began to have fun with golf even though it doesn't happen overnight, but the foundation was laid and everything AJ has said has proven to be true as I applied the principles he explains to my golf game.
Thank you for interviewing AJ. I met AJ when I taught at The Golf Academy of the South and AJ taught at the San Diego Golf Academy . He is a great teacher and he knows a lot about club fitting. He is one of the nicest person you can meet. I'm looking forward to seeing your other videos with AJ.
Thanks for getting AJ on the channel. I love his simplistic approach about the application of the tool. He was highly criticized for his approach being too simple when it’s simply the truth. If the toe doesn’t rotate the shaft would be in the middle of the club head. Take whatever swing theory you like but don’t forget the hand eye coordination aspect and hit golf shots
This is the best video on your channel. I found a way to guarantee the moment of inertia and it changed my game completely. Mr Bonar gave me the tools to swing the club much more consistently, and I've been low single figures.
Interesting take. I’ve taken physic and engineering for a while so I know all about incertia and moment arm but surprisingly I never applied it to golf. The only thing about this is speed and mass/moment arm can be interchanged. Force comes from mass times acceleration. Increasing Moment arm will make distance look effortless while speed will require more work.
Yea I hate when people talk about physics and things that they really aren’t qualified to speak on. He knows just enough to make a person that doesn’t know about physics think he knows what he’s talking about. To be fair, I do like his philosophy on ball striking. Works well in practice
Wow, this is awesome! I am currently a student at Bowling Green State University and play golf, and have heard so many great things about AJ. Such a small world!
The explanation of 'moment arm' is a revelation. I see a direct connection from AJ's straight left arm at contact (longer moment arm) to Monte's swing thought of getting his left arm 'off his chest'.
He’s a very bright man with some solid ideas. Everyone should listen to what he has to say even if you only take a little from his teachings. I’ve seen all his videos several times. I will say when your all paralyzed from too many swing thoughts his methods and mental thoughts work very well, especially in the middle of a round when the wheels are falling off.
I enjoyed your interview with AJ. I now understand why forward shaft lean is needed at impact. I think that you still need right wrist flexion/extension for more club head speed, so long as you don't let the club head reach the ball before the left hand.
As a guy who has really good hand-eye coordination, meaning I was an excellent hitter in baseball, can play a mean game of ping-pong, and is a really good pool player, this makes complete sense to me. I can positively say in all those areas I don't even think about body movement. If the body needs to move, it just moves. This is so simple but complicated because it challenges about everything I have ever been taught when it comes to hitting a golf ball. Great stuff!
I just have to say something after watching quite a few videos ofBe Better Golf. After watching this video, I , as a PhD in the sciences, am so impressed with Brendon Devore and his ability to listen and understand and anticipate where the conversation is going. Even watching him listen to the explanation of inertia was interesting. Keep it up Brendon, you must have been an outstanding student. I am also a Philly fan.
Awesome old school knowledge. Now I understand why shaft lean is so important as it extends the moment of inertia arm beyond my wrists and takes it up to my shoulder for more solidity at impact. Cool stuff.
Bonar is absolutely right about the wrist not firing at impact creating more power. Watching this starting around 11 minutes forward answers the question everyone asks about what the right wrist angle is at impact and should the wrist fire going into impact.
💥💥Very very interesting! This is honestly the first time I have ever heard the swing explained like this and it makes perfect since! Numbers don’t lie and there is no arguing that!💥💥
Now this is dead interesting. I watched this twice to get the concept through my thick skull and now I need the application explained, which I take it will be in later parts? Great stuff B, these docu-style interviews are wonderful.
As a physics nerd this was right up my alley. But in his examples it seemed he was always assuming the acceleration (clubhead speed) was the same whether you broke (shortened) the moment arm or not (his example of breaking at the wrist vs connection to the shoulder...also in his examples of of the bowling ball on a string). If your moment arm is longer you'll have a higher acceleration (larger arc to travel) for a given rotational constant (angular velocity). Thought experiment: think of holding a laser pointer. At the tip of your fingers where you're holding the laser and you move it side to side at 1mph (short moment arm). Now look at the wall 10' away and the laser beam is racing back and forth at 70mph (long moment arm if it was an actual connection). So the gist of all of my gobbledygook is that his method doesn't create more efficient force, his swing concept creates more efficient speed....which then correlates directly to the definition of force (Newton's 2nd law F=MA) Erkel...out!
Not only is the physics presentation in the video misleading, it also misses that the "secret" of a good swing is actually the *whipping* motion of the torso and arm, which is what maximizes that angular velocity and thereby head speed at the ball.
I flip my hands, extend early, hit fat shots, hit high weak misses. Basically I make every mistake he talks about. I’ve been working to get my hands in front of the ball by practicing hitting low shots. This is great stuff which rings true to me. Knowing ahead of time what to do. I feel like it’s better than having debilitating swing thoughts. One of my go to shots off the tee is a low stinger with a hybrid. I tend to hit it great when I say to myself, hit it low, get your hands in front of the ball.
Your new camera is excellent! The resolution is beautiful on my computer. I remember now all of AJ's philosophical takes beginning with the nail and the hammer. I bought it quite awhiles back and maybe I ought to review it to make sure I've squeezed out every bit of relevant swing info for me. At the moment I'm trying to fix fat shots because I have a difficult time taking a divot after the ball. Thanks for bringing AJ back he still has lots to contribute towards this awful game. (joking about the awful part)
I have had the AJ videos on my network drive for years. I remember the article on him in Golf Digest. A lot of big time teachers were calling it to complicated for beginners because it requires too much timing. It is actually the complete opposite. All sports that require movement require timing . I hope in one of the videos you have with him, he has you hit the baseball bat club. What the guy talks about is pure gold.
Moment of inertia can be thought of as rotational inertia. E.g. a bicycle wheel that is rolling along real fast is very difficult to make it fall over, shift its plane of rotation.e. it resists rotating at a different plane/angle. That's why it's harder to ride a bike when you are moving slower,,,less rotational inertia, its easier for the wheel to tip over, change planes....less resistance to moving /spinning through a different plane, angle. this is why, once the backswing is done, and an angle of attack/downswing is set, it's, its very difficult to shift the plane of the downswing as the angular moment builds as the arm club shaft unit swings faster. Yet the body senses the plane is off and tries to correct during the downswing,,but its too late..and ,,,shank!
I tried it at the driving range, it does work. After you get used to it and swing thru the ball you can hit some really solid shots. It is a lot simpler swing, like a rope or really flexible shaft extending from your upper chest to the clubhead. You have to resist the urge to "add" speed with your hands or wrists,... just swing back, shift your weight then from that point just swing the rope and clubhead all the way thru. It may seem like casting, but it isn't, casting is extending to just drop down the bottom.
To find the maximum speed and distance then, they would need to compare this method to one in which you are generating more power through hands and wrists, and compare the two ball speeds...you can't really get a sense for which works without testing both methods side by side
This video kinda just blew my mind about MOI. Also saying speed doesn’t matter as much as u think, because you can apply more force to the ball at the highest MOI at farest pt of our swing arc?
Not sure about track man but right before track man Taylor Made hires him to explain their findings to Golf Pros around the world, so he got a ton of data and numbers from TM
Actually I learned about the so called new ball flight laws from his DVD "A.J. reveals the TRUTH" many years ago. That the start direction of the ball flight is governed by the face orientation not the club path as previously believed by the golf teaching world for 50+ years. A.J. acquired this knowledge while working at Taylormade's lab using certain launch monitor and hi speed cam. At that time Trackman had not been born yet. I told my friends that there is flaw in the old ball flight laws and no body believed me until Trackman.
That was really interesting, but yeah I wasn't quite ready for all the math there. Feel like I need to rewind one more time! Quality-wise it looked great. Watched it on a 5K iMac display and looked really good. I want to check out how it looks on my 4K Samsung, too. AJ's jacket was pretty 'hot' and looked a little blown out so, want to see how my TV does with that, too, knowing my iMac panel is better. Anyway, looking forward to seeing some golf vlogs with it as well. How much longer does it take to upload the 4K content? Do you have fiber at home or a fast upload pipe?
kf about 25 Percent longer to upload I think the real difficulty is that my computer can’t quite handle 4K so it crashes if I try to put a lot of titles on it in editing. Also I wish there was a mode to make it a little less flat looking. Maybe there is a screw on lens that I can use as well. I’m looking forward to getting another camera in the future that has a super high HDR look as well right now my iPhone ex has the best HDR look but this camera is so user-friendly and everything is always in focus
Actually energy is the one that is conserved, so kinetic energy of the clubhead is delivered to the ball as potential energy. The more potential energy the farther your ball can in theory fly. Kinetic energy is 1/2 mass time velocity squared, which is why clubhead speed is still king. It is true though that the longer the moment arm the more clubhead speed one could in theory generate. Regardless, the sternum to the club head is one moment arm and your hands to the clubhead is another moment arm. So called power accumulators. So throwing the clubhead or releasing lag does generate more clubhead speed, but is not necessarily optimal for spin or launch. Just my thoughts...
brendan, very interesting dicussion with aj, however i had his dvd's and watched them many times thru and did not get much out of them. they did not help me but i would like to hear more of his thoughts. thnx steve
Hi Brendon, I'm sure you get this question a lot but I really can't help but notice that World number 1, 2, and 3 (Johnson, Rahm, and Spieth) on pga tour rankings all have a bowed left wrist throughout the swing! I know people brush this off the shoulder but I'd love to see some more videos that address this. Do you know if Tony has done many studies on this?
Brandon, from your body language, u r right in not buying to what AJ Bonar is selling. Club head speed is still the dominant factor in distance. The moment of inertia mentioned by AJ is still from club head to shoulder sockets, and the action of the wrist, adds to the club head speed. Try hitting with no wrist action..U will get a lower club head speed without wrist action. I sincerely think that AJ is misled into thinking otherwise.
You`re right, there are no straight lines in a golf swing. I see some new people to golf at my local range and they are trying to swing the club straight down the line and they look plain ridiculous.
Unless your wrists perfectly line up at impact, then you are always reducing the length to your wrists. Like AJ says...trying to gain speed with your wrists will always be a timing nightmare and almost always slow down the clubhead.
kimo sabe, he is speaking as if the golf swing is similar to one of those robotic arms that simply moves at fast speed through impact and hits the ball square...he is not really addressing the human anatomy lol...but it's an interesting video anyway
MOI matching is a club fitting method. It is different than the moment arm AJ talks about here. That said, I don't think what he says about the left arm plus the club makes a "bigger" moment arm and therefore a more powerful swing. The club and arm are only in line for a moment during the swing. In AJ's video series he spends a fair amount of time talking about the hands and wrists and how the wrists are the final accelerator to put speed in the clubhead. The closest thing I can guess as to what he is trying to say is to get the left (lead) arm off the chest. There are two hinge points in this moment arm and when the two arms are lined up give the maximum club head speed. The ball feeling "light", I contend is the center of gravity of the head is lined up with the ball, and the MOI of the club head does not factor as there is no twisting to feel around the COG of the head. In fact, his video series spends little to no time discussing a swing and far more about using your hands to control the tool to put the club face on the back of the ball. One of the more informative pieces is showing how the club face is in represented in your hands when you hold the club and how moving your wrists and hands affect the orientation of the club face.
See page 146 of the acclaimed study Search for the Perfect Swing, this group of British scientists say that the clubhead is "free wheeling" at impact. There is as if there is a complete disassociation from the golfer. Speed of the clubhead whether accelerating or deceleration is paramount. The moment of inertia explanation given in the video is not supported. Clubhead speed is what governs.
Ball speed is what governs in reality. In other words, all things being equal, you have to strike the golf ball in the sweet spot in order to transfer the energy efficiently.
It would be interesting to see you revisit some of the ideas of old talks and lessons with instructors and compare them with other teachings and see which ones truly hold up. this is a great video but AJ seems to me to be suggesting that most amateur golf swings don't use their entire arms in the downswing. Clubhead speed will always generate more ball speed if all other things are equal right? The only situation I see this making sense in is if someone makes a swing using only their wrists while keeping their arms stationary vs a swing with the whole arm. I would be really interested to see your thoughts! Huge fan of the channel!
Tennis is the perfect example of how you use the wrists, think of it like this if you want to hit a very powerful hard to return topspin shot in Tennis what do you do? do you keep your arm stiff and completely straight? and never turn the wrist over? no this would result in an iconsistent weaker shot, what he has advocated for 20 years is the wrists in all the tour pros rotate through impact just like a topspin Tennis shot, I was surprised AJ did not show you the ball behind method any any of the videos? he shows this in his original truth about golf video. it really helps, you place a ball 12 inches directly in line and behind the ball you are hitting now you take the club away without touching the ball on the way back or the way through, it dramatcially improves your ball striking, because you are forced to take the club up nice and steeply and come down on the ball nice and steeply, more than you would actually think you need to, it will dramatically improve your skills in hitting ball first then turf. it teaches you how to use the correct leverage and get the elusive ball / turf contact.
1 problem the moment arm is always ON THE BOTTOM. Just look at the golf robots. Therefore it’s our Right arm not left. Kinetic energy is always in the rear. Fact
Also, his moment of inertia discussion seems to be confusing itself with simple torque , i.e. force through distance. And to compare the moment length of arm to ball vs. hands to arm, only works if for the entire length of the rotation, the arm is moving at same angular rotational velocity speed as the club shaft. And it isn't. Also, force - mass x acceleration. The club needs to still be accelerating through impact to maximize the rotational force into the ball,,,yet for the top of the club face to actually travel faster than the bottom of the club face, the handle needs to be rotating forward, relative to the bottom of the club face, so the top edge moves faster than the bottom edge at impact....all the while the whole moment arm needs to be accelerating the arm/club shaft through impact. Which makes it impossible for the top edge to be traveling faster that the bottom edge of club face at impact.
So we have to have a downward angle of attack of 15 degrees? Seems an awful lot to me and doesn't correlate to anything I've ever seen measured on GC Quad or GC2 HMT.
I see quite a few people dismiss AJ as a quack. Those people are short sighted. AJ presents A way to play golf....not THEE way. Different things resonate with people. I tried his methods and they do work, but like anything you still have to practice. If you have some type of physical limitation that hampers a golf swing, AJ's way is a good route to try.
Hammering a nail is NOT a straight line deal - your lower arm is travelling in a circular route with the elbow as its center. But I get the point he is trying to make. - think LESS circular and MORE straight into the back of the ball.
Teach and fit with Trackman daily. Distance (power) is derived from the proper combination of ball speed, launch angle and spin rate. What I find, without fail, is that if the golfer makes center contact on the clubface, ball speed is directly proportional to swing speed. Doesn't matter if the golfer is flipped and extended at impact, or holding several degrees of shaft lean. In other words, if you're hitting the center of the face, the only thing that's going to make the ball go faster (fly farther) is moving the Club at a greater rate of speed. 100% disagree with the increase mass, heavy hit theory discussed here. If a golfer wants to hit the ball farther, speed has to increase (while solid contact is maintained).
If you flip you’re just not going to play consistently good golf. It’s not that complicated, you need shaft lean to create consistent ball first contact. The reason most amateurs suck is instructors have overcomplicated the game
Lol physics doesnt care if you agree or not. The kinetic energy equation includes mass. If you want more kinetic energy you add mass or velocity. KE= 1/2 mv ^2 In golf you add lbs of force into the shaft then it delivers the force into the ball
When the ball was feeling light is cause you hit it in the center of the face, therefore getting max smash factor. Also the center of your swing is not your left shoulder, your swing rotates around your sternum via your left and right arm connection. Brandon..it did not seem like you were buying what he was selling.
Great video...But I hate watching these type of video's.. when spring comes around I will be out there trying a new swing, messing up my game worse. I'm 45 I don't think I'm going to change my swing anymore. I just need to work on my short game, work on feel and my putting.
Kinda want to call BS here. What would Nesbit, Manzella, Jeff Martin, Chris Como, and a number of super educated golf scientist/pros/hobbyists say about the "arm length vs club head speed" debate? I think it's all speed.
The golf ball doesnt care how long the moment arm is. If you make square contact at same club head speed the energy transfer will be the same regardless of whether the moment is long or short. Obviously it's better to tow it rather than flip, but arguing that energy transfer differs is nonsense.
This guy is not an engineer. He does not know what moment of arm really is. Dr Kwon is a mechanical engineer, and here is what he has said. A person’s center of mass (COM) is slightly below your belly button & is the balance point of the body. The moment arm is the distance from the force to the axis of rotation. The moment arm is the difference between the COM & the center of pressure (COP). The COP is the point where the body is producing maximum force into the ground. The more pressure you put into the lead foot on the downswing, while keeping COM behind the ball, the more clubhead speed you will create. Some people act like they know what they are talking about, but when you investigate, you find out they really do not know what they are talking about. Very sad.
This is 100% nonsense. The ball feels lighter when you hit it out of center. Increasing your moment arm SLOWS down your speed. Speed directly translates to distance. Moment arm has nothing to do with distance.
Who can decipher the weird way Malaska talks and explains things? And then he gets 1 foot away from you when he talks! Dude - back up a couple steps !!
Not exactly the opposite of Malaska. The release Malaska does from the top is not the wrist releasing forward. He is simply tipping the club out with an inside over the top move. You can do the Malaska move and still not prematurely fire the wrist.
The angle between 2 and 3 oclock is 15 deg. Not 30. Guy doesn't know what he's talking about. If hitting a golf ball only required a back swing of say 5 inches - the back swing of using a hammer to hit a nail - he would be out of a job. And the only way to create speed of the top end of face, faster than bottom edge of face, is to begin the 'roll over' motion at hte very last moment. This is flipping the club face. Not a good move.
AJ is correct, it is 30 degrees 360 degree circle divided by 60 minutes on a clock face equates to every minute on the clock face is 6 degrees. 5 minutes between the clock face 2 and 3 ..... 5 x 6 degrees is 30
Sorry but this is classic case of misunderstanding and misuse of basic physics. You don't transfer the moment arm to the ball. Club head speed and centre contact will translate to ball speed. Optimised with the best launch angle and backspin to match the speed, you will achieve the most distance. Ball doesn't care about the moment arm of the club or the person swinging the club.
A sweet man, but this is nonsense. Moment of inertia applies to rigid objects. He seems to have ignored the flexible face, shaft, wrist and floppy arm. With his argument it follows that one could use a very heavy head on the driver, increasing the MOI and therefore the ball speed!
I purchased the truth about golf, messaged/emailed AJ back and forth, and loved our interaction. He responded directly to me at the time, and explained the concept a bit more clear for me. He's an incredible teacher. Thankfully I no longer subscribe to any online golf instruction or concepts learned online because I bit the bullet and took full on lessons with my local Pro. The result has been a drop in handicap from a 15 in June to a 11.7 by November. I now play golf vs golf swing. With all that said, it is an absolute joy to listen to AJ speak as I love his stories and love the science behind his explanations. If anything, to me, for a good discussion, there needs to be balance, and AJ does just that. Keep up the good work. Looking forward to the next videos.
This channel goes from strength to strength. This guy asks the questions that we would ask. Lets people talk at exactly the right times and asks sensible questions.
His teaching is real eye opener. His "Truth" DVD is one of a kind.
This is the most intelligent golf teacher I've ever seen...him and Mike malaska...more resources from him please
Found AJ in 2003 after years of frustration and futility. What he says is absolutely the truth about golf. I began to have fun with golf even though it doesn't happen overnight, but the foundation was laid and everything AJ has said has proven to be true as I applied the principles he explains to my golf game.
Thank you for interviewing AJ. I met AJ when I taught at The Golf Academy of the South and AJ taught at the San Diego Golf Academy . He is a great teacher and he knows a lot about club fitting. He is one of the nicest person you can meet. I'm looking forward to seeing your other videos with AJ.
Thanks for getting AJ on the channel. I love his simplistic approach about the application of the tool. He was highly criticized for his approach being too simple when it’s simply the truth. If the toe doesn’t rotate the shaft would be in the middle of the club head. Take whatever swing theory you like but don’t forget the hand eye coordination aspect and hit golf shots
This is the best video on your channel. I found a way to guarantee the moment of inertia and it changed my game completely. Mr Bonar gave me the tools to swing the club much more consistently, and I've been low single figures.
Great to hear!
Interesting take. I’ve taken physic and engineering for a while so I know all about incertia and moment arm but surprisingly I never applied it to golf. The only thing about this is speed and mass/moment arm can be interchanged. Force comes from mass times acceleration. Increasing Moment arm will make distance look effortless while speed will require more work.
Yea I hate when people talk about physics and things that they really aren’t qualified to speak on. He knows just enough to make a person that doesn’t know about physics think he knows what he’s talking about. To be fair, I do like his philosophy on ball striking. Works well in practice
Wow, this is awesome! I am currently a student at Bowling Green State University and play golf, and have heard so many great things about AJ. Such a small world!
Great video, possibly the best “Be Better Golf” video ever. I would like to see a lot more of A.J. Bonar.
@Alessandro Noel Definitely, have been using Flixzone for months myself :D
@Alessandro Noel yea, I have been watching on Flixzone for since december myself :D
@Alessandro Noel yea, I have been watching on Flixzone for years myself :D
The explanation of 'moment arm' is a revelation. I see a direct connection from AJ's straight left arm at contact (longer moment arm) to Monte's swing thought of getting his left arm 'off his chest'.
He’s a very bright man with some solid ideas. Everyone should listen to what he has to say even if you only take a little from his teachings. I’ve seen all his videos several times. I will say when your all paralyzed from too many swing thoughts his methods and mental thoughts work very well, especially in the middle of a round when the wheels are falling off.
I enjoyed your interview with AJ. I now understand why forward shaft lean is needed at impact. I think that you still need right wrist flexion/extension for more club head speed, so long as you don't let the club head reach the ball before the left hand.
As a guy who has really good hand-eye coordination, meaning I was an excellent hitter in baseball, can play a mean game of ping-pong, and is a really good pool player, this makes complete sense to me. I can positively say in all those areas I don't even think about body movement. If the body needs to move, it just moves. This is so simple but complicated because it challenges about everything I have ever been taught when it comes to hitting a golf ball. Great stuff!
Wow...thanks for bringing AJ on! The way he explains the science of golf is awesome
I just have to say something after watching quite a few videos ofBe Better Golf. After watching this video, I , as a PhD in the sciences, am so impressed with Brendon Devore and his ability to listen and understand and anticipate where the conversation is going. Even watching him listen to the explanation of inertia was interesting. Keep it up Brendon, you must have been an outstanding student. I am also a Philly fan.
Awesome old school knowledge. Now I understand why shaft lean is so important as it extends the moment of inertia arm beyond my wrists and takes it up to my shoulder for more solidity at impact. Cool stuff.
Bonar is absolutely right about the wrist not firing at impact creating more power. Watching this starting around 11 minutes forward answers the question everyone asks about what the right wrist angle is at impact and should the wrist fire going into impact.
💥💥Very very interesting! This is honestly the first time I have ever heard the swing explained like this and it makes perfect since! Numbers don’t lie and there is no arguing that!💥💥
Watch in 4K, this is my first shoot with a new camera 🎥
BE BETTER GOLF Need to close up of bread and ball position
Now this is dead interesting. I watched this twice to get the concept through my thick skull and now I need the application explained, which I take it will be in later parts? Great stuff B, these docu-style interviews are wonderful.
Mr Kipling w Try to connect my earphones to my iPad so I can look to this program
As a physics nerd this was right up my alley. But in his examples it seemed he was always assuming the acceleration (clubhead speed) was the same whether you broke (shortened) the moment arm or not (his example of breaking at the wrist vs connection to the shoulder...also in his examples of of the bowling ball on a string). If your moment arm is longer you'll have a higher acceleration (larger arc to travel) for a given rotational constant (angular velocity). Thought experiment: think of holding a laser pointer. At the tip of your fingers where you're holding the laser and you move it side to side at 1mph (short moment arm). Now look at the wall 10' away and the laser beam is racing back and forth at 70mph (long moment arm if it was an actual connection). So the gist of all of my gobbledygook is that his method doesn't create more efficient force,
his swing concept creates more efficient speed....which then correlates directly to the definition of force (Newton's 2nd law F=MA) Erkel...out!
Not only is the physics presentation in the video misleading, it also misses that the "secret" of a good swing is actually the *whipping* motion of the torso and arm, which is what maximizes that angular velocity and thereby head speed at the ball.
I once shot a squirrel and ate it...it wasn't that bad
Congrats on the 100K, Mike is my boss in Columbus!!!!
Thanks!
what an honor it must have been to meet such a jedi... thanks for the post.
I watched him teach for a while, very cool experience
I flip my hands, extend early, hit fat shots, hit high weak misses. Basically I make every mistake he talks about. I’ve been working to get my hands in front of the ball by practicing hitting low shots. This is great stuff which rings true to me. Knowing ahead of time what to do. I feel like it’s better than having debilitating swing thoughts. One of my go to shots off the tee is a low stinger with a hybrid. I tend to hit it great when I say to myself, hit it low, get your hands in front of the ball.
you just described my swing...with the occasional shank...ouch!
AJ is my spirit animal.
Another one of your great videos. The end of this is so insightful. Many thanks to you and AJ.
I love AJ's vids and teaching. Thanks for giving us these videos.
Still have those DVDs, and still have "Da Bat" as well. In a pinch, I still use his short game techniques.
Your new camera is excellent! The resolution is beautiful on my computer. I remember now all of AJ's philosophical takes beginning with the nail and the hammer. I bought it quite awhiles back and maybe I ought to review it to make sure I've squeezed out every bit of relevant swing info for me. At the moment I'm trying to fix fat shots because I have a difficult time taking a divot after the ball. Thanks for bringing AJ back he still has lots to contribute towards this awful game. (joking about the awful part)
I have had the AJ videos on my network drive for years. I remember the article on him in Golf Digest. A lot of big time teachers were calling it to complicated for beginners because it requires too much timing. It is actually the complete opposite. All sports that require movement require timing . I hope in one of the videos you have with him, he has you hit the baseball bat club. What the guy talks about is pure gold.
Monte Scheinblum would disagree with you...check out his videos on this channel. If you think Bonar's shit is gold, Monte's stuff is platinum.
cgasucks Monte no turn cast drill may be the best drill in golf
Any idea where fifteen degree down number for pros comes from? Trackman and Foresight report more like 5 to 7 down for irons.
Moment of inertia can be thought of as rotational inertia. E.g. a bicycle wheel that is rolling along real fast is very difficult to make it fall over, shift its plane of rotation.e. it resists rotating at a different plane/angle. That's why it's harder to ride a bike when you are moving slower,,,less rotational inertia, its easier for the wheel to tip over, change planes....less resistance to moving /spinning through a different plane, angle.
this is why, once the backswing is done, and an angle of attack/downswing is set, it's, its very difficult to shift the plane of the downswing as the angular moment builds as the arm club shaft unit swings faster. Yet the body senses the plane is off and tries to correct during the downswing,,but its too late..and ,,,shank!
I tried it at the driving range, it does work. After you get used to it and swing thru the ball you can hit some really solid shots. It is a lot simpler swing, like a rope or really flexible shaft extending from your upper chest to the clubhead. You have to resist the urge to "add" speed with your hands or wrists,... just swing back, shift your weight then from that point just swing the rope and clubhead all the way thru. It may seem like casting, but it isn't, casting is extending to just drop down the bottom.
Eric Takahashi
To find the maximum speed and distance then, they would need to compare this method to one in which you are generating more power through hands and wrists, and compare the two ball speeds...you can't really get a sense for which works without testing both methods side by side
That’s a great explanation and common sense when you think about it great videos
I have heard the term longer then I can remember but he explained it where it made sense to me for the first time.
Moment arm?
This video kinda just blew my mind about MOI. Also saying speed doesn’t matter as much as u think, because you can apply more force to the ball at the highest MOI at farest pt of our swing arc?
I'm curious if any of what he says about "angle of descent", club head speed and moment of inertia conforms with anything we know from Trackman?
Not sure about track man but right before track man Taylor Made hires him to explain their findings to Golf Pros around the world, so he got a ton of data and numbers from TM
Actually I learned about the so called new ball flight laws from his DVD "A.J. reveals the TRUTH" many years ago. That the start direction of the ball flight is governed by the face orientation not the club path as previously believed by the golf teaching world for 50+ years. A.J. acquired this knowledge while working at Taylormade's lab using certain launch monitor and hi speed cam. At that time Trackman had not been born yet. I told my friends that there is flaw in the old ball flight laws and no body believed me until Trackman.
That was really interesting, but yeah I wasn't quite ready for all the math there. Feel like I need to rewind one more time! Quality-wise it looked great. Watched it on a 5K iMac display and looked really good. I want to check out how it looks on my 4K Samsung, too. AJ's jacket was pretty 'hot' and looked a little blown out so, want to see how my TV does with that, too, knowing my iMac panel is better. Anyway, looking forward to seeing some golf vlogs with it as well. How much longer does it take to upload the 4K content? Do you have fiber at home or a fast upload pipe?
kf about 25 Percent longer to upload I think the real difficulty is that my computer can’t quite handle 4K so it crashes if I try to put a lot of titles on it in editing. Also I wish there was a mode to make it a little less flat looking. Maybe there is a screw on lens that I can use as well. I’m looking forward to getting another camera in the future that has a super high HDR look as well right now my iPhone ex has the best HDR look but this camera is so user-friendly and everything is always in focus
Love the 4K❤️
Actually energy is the one that is conserved, so kinetic energy of the clubhead is delivered to the ball as potential energy. The more potential energy the farther your ball can in theory fly. Kinetic energy is 1/2 mass time velocity squared, which is why clubhead speed is still king. It is true though that the longer the moment arm the more clubhead speed one could in theory generate. Regardless, the sternum to the club head is one moment arm and your hands to the clubhead is another moment arm. So called power accumulators. So throwing the clubhead or releasing lag does generate more clubhead speed, but is not necessarily optimal for spin or launch. Just my thoughts...
i would love to hear more about he says about the golf club design!
brendan, very interesting dicussion with aj, however i had his dvd's and watched them many times thru and did not get much out of them. they did not help me but i would like to hear more of his thoughts. thnx steve
Hi Brendon, I'm sure you get this question a lot but I really can't help but notice that World number 1, 2, and 3 (Johnson, Rahm, and Spieth) on pga tour rankings all have a bowed left wrist throughout the swing! I know people brush this off the shoulder but I'd love to see some more videos that address this. Do you know if Tony has done many studies on this?
Very interesting. I'm ready to see more. I'm also curious to hear Tony's take on it.
Brandon, from your body language, u r right in not buying to what AJ Bonar is selling. Club head speed is still the dominant factor in distance. The moment of inertia mentioned by AJ is still from club head to shoulder sockets, and the action of the wrist, adds to the club head speed. Try hitting with no wrist action..U will get a lower club head speed without wrist action. I sincerely think that AJ is misled into thinking otherwise.
how can u hammer a nail in a straight line? It has to be in an arc.
You`re right, there are no straight lines in a golf swing.
I see some new people to golf at my local range and they are trying to swing the club straight down the line and they look plain ridiculous.
Unless your wrists perfectly line up at impact, then you are always reducing the length to your wrists. Like AJ says...trying to gain speed with your wrists will always be a timing nightmare and almost always slow down the clubhead.
kimo sabe, he is speaking as if the golf swing is similar to one of those robotic arms that simply moves at fast speed through impact and hits the ball square...he is not really addressing the human anatomy lol...but it's an interesting video anyway
This is pure gold this guy would have got along great with Mike Austin. LoL
Take a look at this one Brendon. MOI matching.
MOI matching is a club fitting method. It is different than the moment arm AJ talks about here. That said, I don't think what he says about the left arm plus the club makes a "bigger" moment arm and therefore a more powerful swing. The club and arm are only in line for a moment during the swing. In AJ's video series he spends a fair amount of time talking about the hands and wrists and how the wrists are the final accelerator to put speed in the clubhead.
The closest thing I can guess as to what he is trying to say is to get the left (lead) arm off the chest. There are two hinge points in this moment arm and when the two arms are lined up give the maximum club head speed. The ball feeling "light", I contend is the center of gravity of the head is lined up with the ball, and the MOI of the club head does not factor as there is no twisting to feel around the COG of the head.
In fact, his video series spends little to no time discussing a swing and far more about using your hands to control the tool to put the club face on the back of the ball. One of the more informative pieces is showing how the club face is in represented in your hands when you hold the club and how moving your wrists and hands affect the orientation of the club face.
See page 146 of the acclaimed study Search for the Perfect Swing, this group of British scientists say that the clubhead is "free wheeling" at impact. There is as if there is a complete disassociation from the golfer. Speed of the clubhead whether accelerating or deceleration is paramount. The moment of inertia explanation given in the video is not supported. Clubhead speed is what governs.
Ball speed is what governs in reality. In other words, all things being equal, you have to strike the golf ball in the sweet spot in order to transfer the energy efficiently.
@@Spudroe how bout clubhead speed and sweet spot governs ball speed and add angle of attack, launch angle, and spin rate to determine total distance
more of aj wisdom please
I’ve known AJ for 20 years. He is a very smart golf scientist. He’ll basically show you how to use the club as a “tool”!
It would be interesting to see you revisit some of the ideas of old talks and lessons with instructors and compare them with other teachings and see which ones truly hold up. this is a great video but AJ seems to me to be suggesting that most amateur golf swings don't use their entire arms in the downswing. Clubhead speed will always generate more ball speed if all other things are equal right? The only situation I see this making sense in is if someone makes a swing using only their wrists while keeping their arms stationary vs a swing with the whole arm. I would be really interested to see your thoughts! Huge fan of the channel!
Tennis is the perfect example of how you use the wrists, think of it like this if you want to hit a very powerful hard to return topspin shot in Tennis what do you do? do you keep your arm stiff and completely straight? and never turn the wrist over? no this would result in an iconsistent weaker shot, what he has advocated for 20 years is the wrists in all the tour pros rotate through impact just like a topspin Tennis shot, I was surprised AJ did not show you the ball behind method any any of the videos? he shows this in his original truth about golf video. it really helps, you place a ball 12 inches directly in line and behind the ball you are hitting now you take the club away without touching the ball on the way back or the way through, it dramatcially improves your ball striking, because you are forced to take the club up nice and steeply and come down on the ball nice and steeply, more than you would actually think you need to, it will dramatically improve your skills in hitting ball first then turf. it teaches you how to use the correct leverage and get the elusive ball / turf contact.
Thanks very interesting!
This is eye-opening. Wow
AJ is a genius 👨🎓🏌🏼♀️🏌🏼♂️⛳️
where in san diego is this? i don't recognize it.
Awesome. Everything is physics!
1 problem the moment arm is always ON THE BOTTOM. Just look at the golf robots. Therefore it’s our Right arm not left. Kinetic energy is always in the rear. Fact
Very interesting, AJ has my ear 👂
Confused what he means with 15 degrees down, since pros have like a 4 degree down attack angle on a mid iron.
Also, his moment of inertia discussion seems to be confusing itself with simple torque , i.e. force through distance.
And to compare the moment length of arm to ball vs. hands to arm, only works if for the entire length of the rotation, the arm is moving at same angular rotational velocity speed as the club shaft. And it isn't. Also, force - mass x acceleration. The club needs to still be accelerating through impact to maximize the rotational force into the ball,,,yet for the top of the club face to actually travel faster than the bottom of the club face, the handle needs to be rotating forward, relative to the bottom of the club face, so the top edge moves faster than the bottom edge at impact....all the while the whole moment arm needs to be accelerating the arm/club shaft through impact. Which makes it impossible for the top edge to be traveling faster that the bottom edge of club face at impact.
Golf 101 right here. Great video.
Thx!
Always good to brush up on physics
So we have to have a downward angle of attack of 15 degrees? Seems an awful lot to me and doesn't correlate to anything I've ever seen measured on GC Quad or GC2 HMT.
I see quite a few people dismiss AJ as a quack. Those people are short sighted. AJ presents A way to play golf....not THEE way. Different things resonate with people. I tried his methods and they do work, but like anything you still have to practice. If you have some type of physical limitation that hampers a golf swing, AJ's way is a good route to try.
Hammering a nail is NOT a straight line deal - your lower arm is travelling in a circular route with the elbow as its center. But I get the point he is trying to make. - think LESS circular and MORE straight into the back of the ball.
Wow 😮
Teach and fit with Trackman daily. Distance (power) is derived from the proper combination of ball speed, launch angle and spin rate. What I find, without fail, is that if the golfer makes center contact on the clubface, ball speed is directly proportional to swing speed. Doesn't matter if the golfer is flipped and extended at impact, or holding several degrees of shaft lean. In other words, if you're hitting the center of the face, the only thing that's going to make the ball go faster (fly farther) is moving the Club at a greater rate of speed. 100% disagree with the increase mass, heavy hit theory discussed here. If a golfer wants to hit the ball farther, speed has to increase (while solid contact is maintained).
hard to argue with that :-)
If you flip you’re just not going to play consistently good golf. It’s not that complicated, you need shaft lean to create consistent ball first contact. The reason most amateurs suck is instructors have overcomplicated the game
Lol physics doesnt care if you agree or not. The kinetic energy equation includes mass. If you want more kinetic energy you add mass or velocity. KE= 1/2 mv ^2
In golf you add lbs of force into the shaft then it delivers the force into the ball
@@ryanovercash8725 most instructors have no idea what they are talking about
When the ball was feeling light is cause you hit it in the center of the face, therefore getting max smash factor. Also the center of your swing is not your left shoulder, your swing rotates around your sternum via your left and right arm connection. Brandon..it did not seem like you were buying what he was selling.
Go Falcons
Great video...But I hate watching these type of video's.. when spring comes around I will be out there trying a new swing, messing up my game worse. I'm 45 I don't think I'm going to change my swing anymore. I just need to work on my short game, work on feel and my putting.
I agree golf teaching has gotten so complicated and that's why people don't get better.
Yup
Makes sense
Kinda want to call BS here. What would Nesbit, Manzella, Jeff Martin, Chris Como, and a number of super educated golf scientist/pros/hobbyists say about the "arm length vs club head speed" debate? I think it's all speed.
Bonar should demonstrate how to swing the club
He does in his videos and a few with Brandon. His swing doesn't look like much but he can put it out there straight, which all he cares about.
8:26
Hmm so you would hit it 4 times further then if you use the right moment arm. I don't think so
🙏
Part 2 HERE ruclips.net/video/WO4uMmSK2zk/видео.html
You guys need to build rockets 🚀
Jon Rahm has an extremely long moment arm.
*GOLD NUGGETS*
The golf ball doesnt care how long the moment arm is. If you make square contact at same club head speed the energy transfer will be the same regardless of whether the moment is long or short. Obviously it's better to tow it rather than flip, but arguing that energy transfer differs is nonsense.
Can’t hear anything too low
This guy is not an engineer. He does not know what moment of arm really is. Dr Kwon is a mechanical engineer, and here is what he has said. A person’s center of mass (COM) is slightly below your belly button & is the balance point of the body. The moment arm is the distance from the force to the axis of rotation. The moment arm is the difference between the COM & the center of pressure (COP). The COP is the point where the body is producing maximum force into the ground. The more pressure you put into the lead foot on the downswing, while keeping COM behind the ball, the more clubhead speed you will create. Some people act like they know what they are talking about, but when you investigate, you find out they really do not know what they are talking about. Very sad.
So basically, don't flip/ scoop thru impact
SCIENCE!!!
This is 100% nonsense. The ball feels lighter when you hit it out of center. Increasing your moment arm SLOWS down your speed. Speed directly translates to distance. Moment arm has nothing to do with distance.
7
So this is like the exact opposite of what Malaska teaches
Yeah, I ask about that face rotation issue directly coming up in a future post
And Tony. No more underhand baseball throw.
Conflicting lessons from golf teachers are one of the reasons why so many people can't break 90.
Who can decipher the weird way Malaska talks and explains things? And then he gets 1 foot away from you when he talks! Dude - back up a couple steps !!
Not exactly the opposite of Malaska. The release Malaska does from the top is not the wrist releasing forward. He is simply tipping the club out with an inside over the top move. You can do the Malaska move and still not prematurely fire the wrist.
Uhh , there’s no golf instruction here…
morgan run...
The angle between 2 and 3 oclock is 15 deg. Not 30. Guy doesn't know what he's talking about. If hitting a golf ball only required a back swing of say 5 inches - the back swing of using a hammer to hit a nail - he would be out of a job.
And the only way to create speed of the top end of face, faster than bottom edge of face, is to begin the 'roll over' motion at hte very last moment. This is flipping the club face. Not a good move.
AJ is correct, it is 30 degrees
360 degree circle divided by 60 minutes on a clock face equates to every minute on the clock face is 6 degrees.
5 minutes between the clock face 2 and 3 ..... 5 x 6 degrees is 30
Interesting but Malaska makes more sense
Malaska likes to talk to hear himself talk.
All I’ve ever understood from this AJ Boner guy was how to use a hammer…
It was my understanding there would be no math
He said “square root” and my head started spinning, lol.
oh really? I couldn't tell....AT ALL!!!!
Sorry but this is classic case of misunderstanding and misuse of basic physics. You don't transfer the moment arm to the ball. Club head speed and centre contact will translate to ball speed. Optimised with the best launch angle and backspin to match the speed, you will achieve the most distance. Ball doesn't care about the moment arm of the club or the person swinging the club.
A sweet man, but this is nonsense. Moment of inertia applies to rigid objects. He seems to have ignored the flexible face, shaft, wrist and floppy arm. With his argument it follows that one could use a very heavy head on the driver, increasing the MOI and therefore the ball speed!
This guy doesn’t know what he’s talking about lol.