[Etzwane]

I'm not sure what being in synch means. Does this allow for a freewheeling arm swing or have I (again) misunderstood something here? Are you talking about rhythm generally speaking or according to the TGM definition? But the main point is not to accelerate the hand speed it seems..?

Rythm was in TGM terms, i.e. "synchronised", or maybe more accurate "correctly sequenced", so no specific acceleration of the hand independent of the body for a swinger (but of course the whole body-arm-hands bundle do accelerate from Top to impact).

In Swinging, the arms are pulled from the left shoulder (#4 pp) that turn via pivot action, that the natural choregraphy of body parts for a swinger.

Usual caveat: that's based on my understanding of the book and of the informations here, I haven't seen an AI.