JustOne
Ryder Cup Winner
To achieve 90 degrees shoulder rotation on the back swing my hips turn by approx 25 degrees leaving 65 degrees shoulder rotation.
In addition the plane of the shaft which was on a neutral horzontal plane has moved up 5 degrees on my right side at the top of the swing, (I'm right handed). This equates to around a 1.5 inch leg extension as I brace against my back leg.
At impact the plane of the shaft is back at the neutral horizontal position which theoretically is ideal as the club should be in the ideal position for an accurate strike out of the centre of the club, (I've had to use a slow motion swing using my normal shift of balance).
On the follow through the angle of the shaft on the left hip is 10 degrees raised giving close to two inches of leg extension on the front leg.
Try as I might I find I cannot rotate my shoulders to 90 degrees without rotating my hips. As soons as you start to raise your arms everything else falls into place.
My question is what is the typical hip to shoulder rotation ratio, (I can see verybody in their front rooms with a shaft wedged into their trolleys and their wives thinking they are barking mad).
In addition given that I found 1 inch extension on the back swing, no extension on impact and 2 inches extension on the follow through, am I doing something wrong or am I a typical amateur who should be happy with 230- 250 yd drives which generally land on the fairway.
Dave, the shoulder rotation is smoke and mirrors... it takes ages to explain in writing. The spine HATES to be twisted, a person can turn their shoulders maybe 40° (45° at most) to their hips without smoke and mirrors. I'm a pretty flexible guy, I can turn my shoulders 40° to my hips yet I can rotate my shoulders 140° from their starting position....go figure
With regards to extension, if you're not seeing your belt buckle raise by (and through) impact then you are not necessarily extending to your capabilities. As shown in the pics I posted you can see 4" gains or more.