[Jeff]

HB

I imagine that one could jump higher with a dynamic bend rather than a static knee bend.

However, what's the relevance of the jumping-up part?

My mental image of this knee-flexing action is that it is designed to stablise the golfer in his downward thrust action - a form of bracing equivalent to the bracing action of a "firm left leg" that is needed to brace a golfer against the forward momentum generated by the rotating arms/clubshaft.

David Lee, in his book "Gravity Golf" described a counterfall action directed 70 degrees left of the target - that he felt was required to stablise the torso during the down-and-out thrust action of the arms during the early-mid downswing.

I think that all these stabilising movements allow a golfer to swing faster and still remain in balance, but I don't think these movements are prime sources of added power.

I have become more conservative since I discovered TGM's system of power accumulator loading/release. I am skeptical of any "new" idea of generating more swing power - if the "new" idea cannot be explained in TGM terms/concepts. Consider the idea of a second hip/shoulder firing. How could it increase swing power? I think that any proponent of that "new" idea would have to demonstrate how it increases power via the PA system - which is essentially an arm power system. They would have to demonstrate how body power translates into increased arm power at a time point in the downswing when added arm power is useful, rather than harmful.

Jeff.