[Charles Martel]

The academics found that it is the ratio between hips and waist that puts the sway into a woman's walk - and the nearer that ratio is to 0.7, the better.

This ratio provides the body with the right torso strength to produce a more angular swing and bounce to the hips during the walking motion.

This reminds me of a book I once saw at B. Dalton in the early '80s: "A Stress Analysis of a Strapless Evening Gown".

[ArrogantBustard]

It’s on-line. See above.