2010年12月30日星期四

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More force equals more speed. It could be inferred that ablebodied sprinters, using a prosthesis on one leg, would likely run slower as a result of less force. A full breakdown of the study and a video of the tests appears in this Science Now article.The best quote in the Science Now article came from YoungHui Chang, a comparative physiologist at the Georgia Institute ofTechnology in Atlanta....the debate may be missinghow replica Gucci 23928 Ladie's watch much amputee athletes must overcome mechanically to competealongside ablebodied runners. These devices cant generate power ontheir own, like biological legs can, he says. To think that[prostheses] give you an unfair advantage may be overlooking theobvious.

(Science Now, November 4, 2009)Josh McHugh addressed this point in the Wired article, and a cool Wired graphic explained how Pistoriuss prostheses worked. Now, theres a targeted study with solid results that addresses many of the issues brought up in that story.The Takeaway: Not taking into account other considerations about lost limbs, its not accurate to think that prostheses currently give athletes a biomechanical advantage. replica Gucci 23975 WoMen's watch Elite sprinters with prostheses have had to alter their strides and adjust their training in order to compensate for the return energy generated by their lost lower leg, or legs. Comment: If scientists can develop legs that allow paralympians to compete at the same level as other athletes should they be allowed to compete in the Olympics?Joe Springtwitter/joespring

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