Originally Posted by O.B.Left
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Nice post Bernt.
Re the above : Would I be correct in thinking that to sustain the amount of lag pressure , inertia as sensed in the hands one must sustain the hands rate of acceleration? Or is there more to the story. Mass of club for instance? Anything else?
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You don't need to increase hands speed. I don't think you can either, unless you've gone very easy before the release. The release interval is the overdrive gear in the golf swing. Almost an eccentric quality to the muscle work in the upper body if the swing is still powered from ground up. Also, you've got some inertia that works with your hands - club shaft, hands, arms, pivot - all of these are up to speed already and suddenly the lag pressure increases dramatically.
I bet one of the reasons that heavier shafts gives lower ball flight is that it adds inertia to the grip end of the club...
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Can you sustain the amount of lag pressure at the #3 pp after lever extension? All the way to impact? Past impact? Past low point?
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I bet the lag pressure (and therefore also, the golfers linear force) maxes when the overtaking rate is at the highest during the release interval.
I don't think you can sustain max lag pressure at impact, but that you can sustain some lag pressure. How much depends on machine alignment. More #3 accumulator means less release before impact and more impact lag pressure. More #2 release before impact means more swing speed, perhaps, but less lag pressure at impact.
It's a bit like hitting the ball in the middle of the release as opposed to hitting it at the end of the release.
Past impact: I bet you can increase swing speed again. Past low point: Dunno. The only accumulator that can still do something positive is #4 and pulling with left shoulder.
Pivot driven rope handling towards impact will generate a lot of force. Max force when hands are in front of left shoulder. The left shoulder is always pulling from a point that is ahead of the swing center. Linear force as long as the left shoulder is moving. Doesn't even matter where it is moving as long as it doesn't stall or doesn't go in reverse.
#4 is a power house if you are in balance to swing from the feet through impact and if turn hands and shoulders together through the ball. It's like a one-armed dead lift, only a lot stronger since you don't need to pick it up from the ground, but can pull from your strongest position. If you set yourself up for utilizing it to its max it will dwarf any pressure you can produce with your right side. Left leg versus right arm, basically.
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Doesn't impact itself create a spike in lag pressure as the ball and turf place drag upon the club?
I use lag pressure as a tool but it is fleeting. Its sort of like trying to hold water in your hands . Id like to understand it better. Why it leaks away? When it must leave entirely etc.
Thanks for this.
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I think you're right about the spike in lag pressure from ball contact (and turf drag). Common wisdom says that the impact interval is over before the golfer can react to it but I am not convinced. Traditional shaft flexing (some 250-300 cpm) will be way too slow, and that means that you can't make a difference with pp#3 - at least not in the "ice hockey" way. But a longitudinal shock (axial force in mechanics) will reach the hands in less than half the impact interval, and this shock can be acted upon by pulling from the left. And of course any pushing from the right (pp#1 & #3) will tighten the rope even further! I'm theorizing here and I may be wrong, but I'll keep my theory until someone looks at the axial shaft forces during the impact interval and not the shaft bending and torquing.
Lag pressure doesn't leak away in my swing before impact. At least not when I'm doing what I'm trying to do

. But I'm not monitoring it only from the right side... I am more concerned with feeling inertia in the left hand.
I think key is to minimize, or at least reduce accumulator #4 lag at the top, power the hands more by push-pulling from the shoulders, and sustain this pivot power as opposed to releasing arms and club with pp@4 push. A full #4 release will create a lot of swing speed initially but the turning shoulders will not have as much leverage later...
Monitor and sustain lag pressure from pulling left shoulder and the tension in the muscles inovolved in producing it (left side of back). Elbow plane through impact is IMO an enabler in sustaining lag pressure better through impact.
Basically swing hands with shoulders and swing club with hands.... all the way. Flat shaft angle to get the shoulders and club as well aligned as possible. I think Hogan did something like this.
Or go with TSP and do whatever Yoda does. He seems to sustain it pretty well too!