I agree that he is flexing his knees during the backswing. Biomechanically, he is still performing the same motion - bracing the knees by flexing the knees so that they are ready to withstand the downward arm swing thrust action movement without losing any body angles or balance. Theoretically, that knee flexing action could presumably occur in the early downswing - just before, and in anticipation of, the downward arm thrust action movement.
Here are images of VJ Singh where it appears that his knee flexing action occurs in the early downswing and not the backswing.
Not all PGA tour golfers seem to need that knee-flex action.
Here are a series of images of Adam Scott. His knee flex angle doesn't seem to change much during his backswing/downswing.
Position 1 and 2 = backswing, positions 3 and 4 and 5 = downswing.
I agree that he is flexing his knees during the backswing. Biomechanically, he is still performing the same motion - bracing the knees by flexing the knees so that they are ready to withstand the downward arm swing thrust action movement without losing any body angles or balance. Theoretically, that knee flexing action could presumably occur in the early downswing - just before, and in anticipation of, the downward arm thrust action movement.
Here are images of VJ Singh where it appears that his knee flexing action occurs in the early downswing and not the backswing.
Not all PGA tour golfers seem to need that knee-flex action.
Here are a series of images of Adam Scott. His knee flex angle doesn't seem to change much during his backswing/downswing.
Position 1 and 2 = backswing, positions 3 and 4 and 5 = downswing.
Jeff.
Biomechanically, can one jump higher from a static bent knee posture or down and up motion?
I imagine that one could jump higher with a dynamic bend rather than a static knee bend.
However, what's the relevance of the jumping-up part?
My mental image of this knee-flexing action is that it is designed to stablise the golfer in his downward thrust action - a form of bracing equivalent to the bracing action of a "firm left leg" that is needed to brace a golfer against the forward momentum generated by the rotating arms/clubshaft.
David Lee, in his book "Gravity Golf" described a counterfall action directed 70 degrees left of the target - that he felt was required to stablise the torso during the down-and-out thrust action of the arms during the early-mid downswing.
I think that all these stabilising movements allow a golfer to swing faster and still remain in balance, but I don't think these movements are prime sources of added power.
I have become more conservative since I discovered TGM's system of power accumulator loading/release. I am skeptical of any "new" idea of generating more swing power - if the "new" idea cannot be explained in TGM terms/concepts. Consider the idea of a second hip/shoulder firing. How could it increase swing power? I think that any proponent of that "new" idea would have to demonstrate how it increases power via the PA system - which is essentially an arm power system. They would have to demonstrate how body power translates into increased arm power at a time point in the downswing when added arm power is useful, rather than harmful.
I imagine that one could jump higher with a dynamic bend rather than a static knee bend.
However, what's the relevance of the jumping-up part?
My mental image of this knee-flexing action is that it is designed to stablise the golfer in his downward thrust action - a form of bracing equivalent to the bracing action of a "firm left leg" that is needed to brace a golfer against the forward momentum generated by the rotating arms/clubshaft.
David Lee, in his book "Gravity Golf" described a counterfall action directed 70 degrees left of the target - that he felt was required to stablise the torso during the down-and-out thrust action of the arms during the early-mid downswing.
I think that all these stabilising movements allow a golfer to swing faster and still remain in balance, but I don't think these movements are prime sources of added power.
I have become more conservative since I discovered TGM's system of power accumulator loading/release. I am skeptical of any "new" idea of generating more swing power - if the "new" idea cannot be explained in TGM terms/concepts. Consider the idea of a second hip/shoulder firing. How could it increase swing power? I think that any proponent of that "new" idea would have to demonstrate how it increases power via the PA system - which is essentially an arm power system. They would have to demonstrate how body power translates into increased arm power at a time point in the downswing when added arm power is useful, rather than harmful.
Jeff.
Jeff,
I'm skeptical too. The more I figure out, the more Homer rings true. In fact, the more I think about moving my power package fast, the father the ball goes. But, I do notice that the guys that hit it really far in the air tend to go from bent legs to straight legs.
I'm skeptical too. The more I figure out, the more Homer rings true. In fact, the more I think about moving my power package fast, the father the ball goes. But, I do notice that the guys that hit it really far in the air tend to go from bent legs to straight legs.
So this bent to straight leg thing, aint in the book? Is that right?
Thats ok , though right. Homer did say "because of question of all kinds....
HB - I think that going from a bent knee position in the downswing to a straight left leg position at impact is nothing more than the O factor principle - as described by Robert Baker in his swing video lesson. It simply depends on how much of a positive O factor one wants to acquire at impact. Some golfers like Tiger Woods have a very straight left leg at impact (which is partially responsible for his left knee damage) while other golfers keep their left knee slightly flexed at impact.
I agree with Robert Baker that it is a good idea to have a positive O factor at impact, but greater amounts of O factor do not necessarily correlate with increased clubhead speed. One only needs enough O factor to get secondary axis tilt that allows the right shoulder to move downplane, which allows for the correct in-to-square-to-in clubhead swingpath when PA#4 releases the left arm into impact.
Hogan Power Golf era swing ( I reckon about 1947 - but that is debatable on seperate thread..lets not get off topic )
Foot action , left knee, left shoulder...right knee...right shoulder...
This shows the bit that Ben Doyle "catches the tail " of the dog which he has just let out between his legs.... pretty near cuts the tail off IMO!!
This is the swing where he nearly loses balance... he clearly loved to hit it a long way...
Dog I just realized you are a English bull dog as opposed to most of the Georgia Bull Dogs around this site.
Great stuff, you are fast.
Yes this footage is him really giving it a whack for the camera. Still looks beautiful though , eh?
Two questions I have for all or y'all:
-at what point is this compression a bob and inadvisable? It for sure has implications for the radius as the left shoulder is on the move. Tiger never hits it fat though and I suspect Hogan didnt lay the turf over it too often either, eh Henny? How do they do that, a lot of #1 and 4 left at impact?
-what are we seeing in Mr Hogans hip action in these two photos. It looks like a "jump and twist" as described in the article to me. More curious to me is what is driving this hip rotation or twist? The hips, the right hip, the left hip, the legs , the knees the feet? Im thinking its a hip action of some sort.
OB, have no idea that Georgia had it's own Bulldog! I am British version ...probably equally as inbred though!
I see alot of left leg extension through and just beyond impact (bit like baseball guy that 12PB had)...and left shoulder goes "level left" during COG transfer..then up a bit as hands approach release...then left shoulder goes through the roof through impact!!
Hogan had massive gluteal muscles... look at KOC's recent video
- Hogan's tush juts out way more than the average flabby guy! He is like J-Lo - It may be artifact from all the surgical strapping he was using for his legs... Ok ..probably not... but it looks like the glutes of a 100 metre sprinter .. I think that somehow that is a key component of his swing. I not sure how the biomechanics people will take that but you don't develop that kind of muscle and NOT use ! Glutes are hip extensors i think...that might work.
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Hybrid Mode
