interesting thing I read

[golfinguy28]

post removed

[Martin Levac]

Re: interesting thing I read

Centripetal force. The jumping is a reaction to the force we apply. At impact, a club can weigh as much as 60lbs due to centripetal force. We apply a force of at least 60lbs in the opposite direction. In this case, upward. When the club strikes the ball, it decelerates. As it does so, it weighs less. But we are still pulling it with as much force as before. We jump.

[BrianW]

Re: interesting thing I read

How can you have weight distribution of 25/25% ? It must be 50/50 or 60/40 or something that adds to 100.

You can have less downward force, I expect that's what they mean. If you look at pictures of these Long Driving competitions they lift off the ground at impact.

[kbp]

Re: interesting thing I read

The numbers are the force each foot applies to the ground, expressed as a percentage of total body weight. Very clear, concise way to express the concept, IMO.

Only the static positions require that the sum of the foot reactions equal the total body weight (plus club weight, too).

[GregJWillis]

Re: interesting thing I read

So where does the mass go? A lot of its got to go into the club and club head being delivered into the ball. Probably some in the arms being flung around as well.

[bill reed]

Re: interesting thing I read

hi
i still dont see how you can make yourself lighter, if you could the army would use it when marching over bridges, sailer would use it when sailing. no you can shift weight from one part of your body to another but you still weigh the same. try using a power ball and check your weight when its spinning real fast and your weight dont change but you do feel a weigh change in your arm, i think a power ball builds up more force than a golf club as it spins about 1500 rpm. i remember someone putting a battery powered power ball on a driver head and it ment you had to sing on plane due the the force of the ball spinning in the club head.

cheers
bill

[Avid Golfer]

Re: interesting thing I read

I can't remember where I read it, but it was something with regards to weight relatoin. Saying at adress you should have the weight on your feet 50/50 (front foot/backfoot) or 40/60 fro drives and 90/10 for short chip shots.

Nothing new right, but then I read at impact pros have 25/25. I have also seen shots of tiger and others that have one or both feet off the ground at impact. Anyone know how they can "jump" at impact like that, and is that why they get such good distances? is it from a such a violent hip turn that they atually raise off the ground?

The vast majority of tour pros do not come off their front heels at impact, and the few that do are not known for being consistantly in the fairway off the tee. Shifting your weight off of your front heel at or around impact reduces the chance of being able to hit the ball consistantly and accurately.
I don't believe hip rotation pulls/pushes the players heels in the air. Hip rotation (not slide) from a biomechanical view point is likely to shift body weight to the heels not the opposite. Moving weight toward the toes/ball is what puts the players on their toes. You could setup in your golf posture and rock your weight to your toes (where your heels rise slightly off the ground) and conversely you could rock your weight to your heels (where you could wiggle your toes in the air).
Most of us would probably agree that not all the golf instruction out there is good or worthwhile. Much of what you read or hear isn't necessarily logically correct, nor appropriate for your game. If you're looking for a way to get more distance you're better off going with the scientifically and majority supported theories (like the X-factor stretch).

How can you have weight distribution of 25/25% ? It must be 50/50 or 60/40 or something that adds to 100.

You can have less downward force, I expect that's what they mean. If you look at pictures of these Long Driving competitions they lift off the ground at impact.

Those long drivers that fly off their heels don't play on the professional tours for a reason. They don't have the consistancy or the accuracy to compete with the tour players.

[bill reed]

Re: interesting thing I read

hi Avid golfer
intresting point about weight shift on the left foot and going more onto the outside of the foot nearer the toes, one of the things my open stance Trevino system does is let you shift to the out side ball of the left foot with ease, if using a closed stance it much harder to do as the timing of the hip turn is so much more important in getting that weight shift and you see a lot of player that draw the ball with a closed stance come up on both toes when the hip's dont turn enough.
cheers
bill

[BrianW]

Re: interesting thing I read

Those long drivers that fly off their heels don't play on the professional tours for a reason. They don't have the consistancy or the accuracy to compete with the tour players.

Yes Avid, I agree. I was trying to show that Long drive hitters created this effect. I would not suggest that regular players attempted to replicate it.

[BrianW]

Re: interesting thing I read

and yes brainW (for the sarcastic and/or literal readers out there), what KBP said.... 100% is the total body weight applied to the groud (i didnt' think I needed to litteraly explain that). the test was probly done on thoose scales that can tell you if the weight is on the back or front foot and how much weight. So if someone weighs 100lbs at impact the scale would only show 50lbs. Of course they didn't loose 50lbs, they just "jumped" enough so that 50lbs of weight was taken off the scale, you can try that on your home scale if you want. Push down on the counter and you can appear to weigh 10lbs less.

Hey, relax. My comment was not sarcastic, more thinking aloud. Sorry if that's how you understood it.

[jamesh]

Re: interesting thing I read

I had a post here a long time ago on this topic, but I can’t seem to find it or the material I referenced on GTO. I have attached a link – click on, in particular, The Big Launch – it tells you where the power comes from and for some, where the weight goes.


Jamesh


http://www.exn.ca/dailyplanet/view.asp?date=7/7/2006

[bill reed]

Re: interesting thing I read

hi golfinguy
you say that pushing onto a sink lets you weigh less on the scales but that dont make you lighter it only means you have not weight yourself as you are shifting some of the weight to the sink through your hands, you still weight the same. and in all my years in the army i never head if a technology that made us weigh less, and you talk about helicopters but the rotors produce lift in relation the the weight thats why helicopers cant carry much of a load.
i really dont see any way you can make yourself lighter swinging a golf club. your full weight will transfer from foot to foot but you cant have 25% of your weight on both feet and suddenly lose 50% of your weight swinging a golf club, even for a second.
your last point about the centrifigal force working when swinging dont make the club heaver, it did it would be impossable to change it direction of the club head when comming into the ball and to open and close the face through impact as you would be fighting that centrigal force and thats not the case as you can change the swing path when swinging. if swinging with a weighted club then it does get harder to change the swing plane but it still possable.
try using a power ball and when its spinning and swing your arm like you do with a golf club, then you will feel what centrifigal force feels like but it still dont make you lighter.
cheers
bill

[kbp]

Re: interesting thing I read

Nothing changes it’s mass nor it’s weight. The direction and magnitude of the acceleration of things DOES change. That changes the force that your mass applies to the ground. When you are standing still the force you apply to the ground absolutely has to be equal to your weight. However, when you’re moving, and/or when you’re moving objects that you’re holding, the force you apply to the ground doesn’t have to equal your weight. Flex your knees and jump into the air. You’ve gone from applying a "50/50" force to the ground to a "0/0" force applied to the ground.

I’m not going to vouch for the specific percentages, 25/25 or whatever, because that seems a bit extreme.

[BrianW]

Re: interesting thing I read

I think it's a factor of the forward and upward momentum of the follow through that lifts upwards or even off the ground, the more violent (As with a long driver) the more momentum and subsequent lift.