Swinging of arms

The easy and quick response is that it helps balance. This is certainly demonstrated in situations where balance is critical, but it doesn't answer why swinging arms is so pervasive while walking and generally only restricted when the arms are used for something else.We also see that breathing is augmented in horses when running by the action of the limbs stretching and contracting the chest area: swinging arms may make breathing easier for other gaits as well. This would be an evolved behavior (ie the breathing came first, so the arm swinging was kept as a vestige of the previous four legged gait behavior).ps - welcome to the frayEdited by RAZD, : ps

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nit pick: Australopithecines were fully bipedal. Bipedalism is about 5 to 6 million years old while Australopithecines are 3 to 4 million years old.Bipedalism precedes the savanna habitat (with refutes it being a cause for evolution of bipedalism, instead showing that hominids were pre-adapted to take advantage of the new environment ... ) Consider how difficult it is to swing your arms with the wrong synchronization with your legs ... this tells me that this pattern is problematic for behavior not being linked.

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