^^^ Interesting comment, islandgolf ... but which pictures are those?? You know that GRF's are invisible to the naked eye ....
The actual forces are invisible but do they leave or cause visible effects?
The importance of ground forces in the downswing
- Thread starter James Marshall (Hogan1953)
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The actual forces are invisible but do they leave or cause visible effects?
islandgolf629
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SteveT, yes, I am very aware GRF's are invisible to the naked eye, unless of course something else makes them visible that can easily be seen on Americans but not Europeans.
S
SteveT
Guest
Yes they do, grasshopper ... they make you swine faster ...
S
SteveT
Guest
Force plates will reveal the GRF's and inverse dynamics will explain why it's happened. It's all quite complicated.
The difference I see between Americans and Europeans is that Americans "swing" while Europeans "rotate" ... strange ...
islandgolf629
New
Hahaha,It's more simpler than that.
Dariusz J.
New member
Yep, I agree, Steve. Tried many times to explain with mediocre success with written words in my English. However, I do not know anyone who wouldn't understand it either while explaining it tete-a-tete or with a good visualization unless it is someone who either do not want to learn or has an agenda.
I am almost sure that knowing how ground forces work in a given motion is a huge thing for making a giant progress in sports, not only in golf.
Cheers
Greg Norman had tremendous GRF yrs ago and was one of the straighest hitters of the tee in the world then he went to Leadbetter and well that was it. Old footage you could see different footwork or action just by watching the right foot -Then came soft spikes and oh boy! One can train grf just like martial arts does all thou slightly different then golfers most people think you just drag the right foot up so they never feel vertical or horizontal pressures. Remember the old golf digest article in the 80's the best ball strikers had more weight on the right side then left
Jon Hardesty
New
The longest hitters have learned how to use the ground to create torque.
mandrin
New
I started a thread on ground reaction forces about a year ago - 'Ground reaction forces / angular momentum' - and sometimes it is not bad to use the search facility to see if information is available. In the mathematical analysis I tried to demystify somewhat the ambivalent character of ground reaction forces by showing the relationship with the internal torques generated by the golfer.
In golf there is a very fine line separating genuine knowledge from commercial interests and when instruction stretches the importance of using ground reaction forces some perhaps might wonder if they have missed on some hidden source for power. Well there is not any. The golfer, with his own sweat, creates the ground reaction force. Not much comes for free.
In the mathematical analysis I tried to demystify somewhat the ambivalent character of ground reaction forces by showing the relationship with the internal torques generated by the golfer.In golf there is a very fine line separating genuine knowledge from commercial interests and when instruction stretches the importance of using ground reaction forces some perhaps might wonder if they have missed on some hidden source for power. Well there is not any. The golfer, with his own sweat, creates the ground reaction force. Not much comes for free.
Mandrin answered in the other thread:
I guessed right.
"There was no significant difference between the metal and alternative spike shoes for any torque measure (p > 0.05), ..................."
Journal of Sports Science and Medicine (2008) 7, 408-414
mandrin
New
wulsy,
A golfer club ensemble is one system, yet composed of various sub systems.
There is hence the overall system angular momentum and the angular momentum of each sub system
The only possible cause for increasing angular momentum is due to action generated by the golfer.
The wrist torque redistributes angular momentum between arms and club but does not generate net angular momentum.
Forces/torques are exerted by one body segment relative to another adjacent one.
Each and every torque, generated by antagonistic muscle groups, has its reaction torque.
An essential part of the golfer club ensemble is mother earth.
It allows the proximal torques to generate motion relative to the anchors (feet) with mother earth.
Oversimplifying -
Proximal torques generate angular momentum.
Intermediate torques generate and redistribute angular momentum.
Peripheral torques only redistribute angular momentum.
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