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Science News, July 19, 2008
It's all in the hips. Or is it? University of Ottawa researchers decided the complex task of hula hooping needed more attention, so they set out to study the coordinated movements that keep the plastic ring from dropping down. Three volunteers--who could spin smoothly for 20 seconds but had no competitive experience--were attached to motion sensors and stood on plates that measured force. Though the volunteers moved their middles in the same way, each gave the hoop lift differently. A burp in the ankle or jerk of the knee both kept the hoop up, the team says in an upcoming Human Movement Science.
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