I dont get the rotation part.
in freestyle , when looking from above, the shoulder with goes from narrow-wide-narrow.
When holding the hand at shoulder with while moving backwards, the hand goes also from narrow-wide-narrow.
This causes some s shape for an outside observer, even if the swimmer is pulling straight back at the same edge of the body.
In butterfly there is no rotation , so the S relative to the body is the same as the S for an outside observer.
In butterfly we make an S relative to the body , if we would make the same S in freestyle it would look even more extreme as in butterfly because of the addition of the narrow-wide-narrow on top of the relative to the body butterfly style S path.
In freestyle we do see some S, but less than in butterfly, so we pull much straighter relative to our own body in freestyle than in butterfly.
Last edited by Zenturtle : 09-29-2016 at 07:24 PM.