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Swinging arms most efficient way to run

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Ever tried running without swinging your arms? New research has shown that the swing in your arms counter balances the movement of your legs and saves energy at the same time.

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									Ever tried running without swinging your arms? New research has
shown that the swing in your arms counter balances the movement of
your legs and saves energy at the same time.

"We know from the literature that arm swinging plays an important
role in balancing the motion of the swinging legs," said Christopher
Arellano from the Brown University.

Arellano studied 13 runners and measured their oxygen consumption
rates and carbon dioxide that they exhaled.

He asked them to run without swinging their arms by holding the arms
loosely behind the back, crossing the arms across the chest, and
holding the hands on the top of the head.

He found that swinging the arms reduced the runners' energy costs by
three percent (as compared to when they held their arms behind their
backs).

Arm swinging also saved energy an impressive 13 percent compared
with when they held their hands on their heads.

"I think everyone conceded that the most challenging run was the one
with the hands on the top of the head," Arellano added, recalling how
runners complained about how tired their arms were at the end of the
session.

The study appeared in the journal of Experimental Biology

Ivan Petrov

								
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