[BerntR]

The Left Arm Flying Wedge, the Flat Left Wrist and Left Arm all move around the Left Shoulder Hinge Pin together at the same RPM’s. You can make it your personal 4th.

At the top, the club is lagging behind the left arm with about a quarter rotation (90 degrees) and in the finish it is leading with 90 degrees. In the definitions. So the shaft moves at a higher RPM than the arm and there is a gradual overtaking here as well.

In the definitions he says .... "the same basic RPM" when he talks about golf rhythm. But in the mechanical definition the term "basic" is left out. The wort "basic" is hardly a coincidence here. The definition also states "overtaking all other components at an even, steady, rate."

I don't think this definition is very good, becaus what really happens is different from what the definition says.

The overtaking rate in the stroke isn't. If you look at the kinetic link speed profiles of hips, shoulders, hand and clubhead, where the predecessor peaks and then slows down as the successor takes over, this is clear. (Now where are those nice illustrations when you need them )

To me, rhythm is to manage this sequenced overtaking and time it so that lead-lag relations in the kinetic link, including clubhead lagpressure is sustained - and the flat left wrist is intact until low point (deep breath).