Here is a graph showing the arm speed of an excellent golfer.
Note that arm speed increases after the shoulders decelerate. However, arm speed decreases prior to impact. Note that clubhead speed increases all the way to impact (slope of the clubshaft curve represents its rate of acceleration).
Let's presume that one could prevent the left arm from slowing down in this kinetic sequence by some supplementary biomechanical maneuver (eg. increasing right shoulder thrust). Would that be advantageous and increase clubhead speed at impact?
I think not - because the arms have to slow down to allow for the complete release of PA#2 and PA#3 in a swinger's action. Accelerating the left arm in the late downswing will interfere with the club's release phenomenon, and actually decrease clubhead speed into impact.
I think that the only practical method of increasing clubhead speed is to increase the speed of evolution of the entire kinetic sequence. In other words, Tiger Woods performs this entire kinetic sequence much faster than the average amateur golfer, who is skilled enough to get the kinetic sequence correct.
I agree with most of your stuff about kinetic sequence. But can I just check that I see the same things as you in that chart?
When you say the shoulders decelerate - do you mean time point green diamond?
I am not convinced that the arm rotational velocity increase much between green diamond and blue circle (time point for max arm speed)... the arm speed trace seems to plateau at about the same time as the shoulder rotation...approximately.
The thorax does increase in rotational velocity after peak pelvis rotational speed - That I do accept.
What interest me is the relative lack of vertical motion in the early DS pivot (top of BS -ie. pre red square - to green diamond) relative to the period in later DS ( green diamond to impact).
This is where the piston shoulder bit comes in I think... as i said earlier - it may be hand path that is effected most...your graph shows rotational speed...the shoulders move less in rotation in some DS segemnts and more in vertical direction it seems ...?
For Joe Norwood material i will PM (it is commercial so can not post on LBG)
Henny, Bucket and all are on to some interesting stuff here. In your roll as forum leader, please keep them on track, focussed and unfettered by the need to defend even their most basic of thoughts. Lets hear them out while they postulate and maybe we'll all learn something.
You did ask for peoples thoughts on this very interesting article so lets hear em.
Im a big fan, by the way but please let em loosen up a little so they share their insights in the light of day.
Hybrid Mode
