Re: Full Extension after impact?One of the least understood things about a great swing is if you take your finish position as a final reference, and were to draw a diagram of the semi-circle of the club head has traced on the plane of your target line, the distance of the club head from your body (in the finish position) is greater on the backswing than the follow-through. Think of it this way, if a 3-D picture of your swing viewed from the side facing the golfer was pressed into 2-D (as any video image taken from this vantage point actually is) then the extension back is longer than the extension forward from your body's "in-balance finish position" toward the target
At no time in the follow-through does the club extend toward the target line more than it extended away from the target line on the backswing. Of course, there is a weight shift in most swings toward the right side, and the body moves forward to the finish position, so this is not an absolute measurement of distance from your center of mass (that would be very close to the same,) but it illustrates a key point noted above, a connected swing does not require your arms to over extend toward the target. This does not mean you should not extend down the line and release, only that there is a lot of extension during the backswing in the most powerful players. If you get that right, and shift weight correct while clearing your hips, you will get good forward extension automatically.
I've seen this in many noted swings, and I happen to notice it again in the swing of Anthony Kim recently. His swing was shown as a series of superimposed frames where you could see the path of the club back and through, and Kim was frozen in his finish. The semi-circle was very long on the backswing at 3:00 o'clock, showing a good weight shift forward had to follow. The modern rotary swing goes left pretty hard after impact.
Don't believe it? See Golf Magazine (Sepember, 2009, page 100.) This point might generate some good debate.