[Matt]

Another thing that you shouldn't glance over when discussing extensor action is how it provides structure to the power package. When I did some work with Ted, he had me working more on extensor action because of the 'underplane' downstroke motion I have a tendency to exhibit. My left arm was straight, but my extensor action was nonetheless lacking.

What would happen was at startdown I would drop the shaft a little underplane, and my right elbow would be very bent and approaching from the inside - a "perversion" of 'sit-and-tilt' if you will. When I applied correct extensor action, it felt as though my right arm couldn't get any straighter at startdown and the clubshaft felt very much 'in front' of me. However, the camera doesn't lie and this type of feeling put me right on the turned shoulder plane coming down.

So not only does extensor action keep the left arm radius constant, but it also firms up the power package structure via the right arm.