Abstract
This unique everyday while walking is an ordinary human, and the human race. Therefore more economical loose bipedal walking.
The economic advantage has been mentioned in a previous article. Other close human primates (orangutan, gorilla, chimpanzee) are capable of bipedal walking, but because of their pyramidal paths do not reach the pelvic girdle is their bipedal gait and running very inefficient.
Another reason for the low efficiency is the lack of adaptation of the feet for two-leggedness. Lack of neurological and morphological trim our closest relatives (in the cervical spine and the great occipital hole, this is not gibbons) for energy-efficient gait, however, corresponds to their normal motion behavior (mostly travel on four legs), and this behavior will not require changes, which resulted in the most economic locomotion of terrestrial vertebrates on a hard surface, ie in two-legged humans walk.
If we realize that because that man has reduced their body weight by 1 kg (outside water losses) must pass 90 km, it is the effectiveness of the human gait obvious. According to the scientific knowledge of the past 25 years, it is apparent that a similar efficient locomotion is running.
Current theories describe the race as the original evolutionary advantage for hunting, when a group of hunters could also thanks to improved human thermoregulation deer chase. In fact, it was an overheating.
Efficiency termoregulce hunted animals was much lower than the human thermoregulation. Man can take away the excess heat energy caused by the actions of muscles through sweat.
The wetted surface of the body and the latent heat of vaporization is removed from the body heat.