Short Route vs. Long Route

This author teacher was very competitive in swimming and tennis. We were trained to make our ‘Back Swings or Load Strokes’ follow the shortest route from A To B. (see ‘ALSDR - Accumulate, Load, Store, Deliver & Release’) The wider the arc or greater the curvature, the longer the distance the ‘Sweet Spot’ must travel in the front swing or ‘Power Stroke’. Of course, this means more ‘Time & Distance to accelerate. The quicker we could get into the ‘Power Stroke’ and stay in it, the better. (see ‘The Big Pull’ in swimming) Pretty logical?
In golf we tend to promote depth and width in the back swing and reciprocally creating the big circle in the ‘Down & Out or Front Swing’ and ‘Club Head Distance’. (see ‘Deep, Flat & Wide’)