I know Brian is often an advocate for the flat left wrist, but all this talk about cupping like Hogan is quickly making a believer out of me.
When I think about the everyday applications of a natural wrist hinge (e.g. hammering a nail, or casting a fishing rod), I begin to wonder whether the flat left wrist isn't risky from an anatomical standpoint. When I cast a fishing rod (and I can sling that sucker out there pretty far) my wrist is cupped at the bounce of my hinge, not flat.
Now, I know what everyone is going to say: casting is a beginner move! I'm beginning to disagree. The golf swing IS a cast... a sidearm grounder to first with a fishing rod in your hand rather than a ball.
Even when the left wrist is kept flat at the top of the backswing, how is the right positioned (speaking in terms of a right handed player)? The right is cupped. Why should one wrist be cupped and the other flat? Imagine you are splitting firewood with an overhead swing of a heavy axe. At the top of the swing, both wrists are hinged in an anatomically correct, cupped position.
Am I making any sense here?