[EdZ]

I'm trying to get a better understanding for the causes of over acceleration in a swinger.

Is it all about avoiding muscular effort with your left arm and any 'adding' with your right arm. Are there any other important factors? For example how important is the pivot? Can you rotate too fast?

One of the biggest causes is lack of 'smoothness'.

By that I mean a swinger needs to be building speed. One of my favorite quotes from Al Geiberger "there can only be one 'fastest' part of the swing".

A swinger who tries to make that fastest point either 'at' the ball or worse, before impact, is over accelerating. The idea is to try to make that fastest point AFTER impact, THROUGH the ball, and by doing so help sustain the line of compression (minimize impact decel).

Certainly adding right arm, or incompatible loading/unloading (bad transition), are factors.

Efficient force is always smooth and feels very heavy.