Re: AAT Theory

Gerrit Hanenburg (
Sun, 29 Oct 1995 13:11:04 GMT (H. M. Hubey) wrote:

>OF course, human biped motion is not too efficient.

That depends on the speed:

"At maximum running speed human bipedalism is twice as expensive
energetically as estimated for a quadrupedal mammal of the same body size."

"However,at average walking speed (4.5 km h^-1) human bipedalism is
slightly more efficient than is quadrupedalism in the average mammal.."

From:Aiello and Dean._An Introduction to Human Evolutionary Anatomy_
Academic Press 1990,p.272.