Building a Better Athlete

If the body is a machine, the best ones need pit crews. Meet the technicians behind the champions

Jensen Larson for TIME

Kevin Carroll, Vice president of prosthetics for Hanger Prosthetics and Orthotics .

Kevin Carroll Lost limbs are no bar to competing or excelling at sports, thanks to improved spare parts

DESIGNER Perspective can be everything. In January, when the International Association of Athletics Federations ruled that Oscar Pistorius' artificial legs gave the sprinter an unfair edge in Olympic competition, prosthetics designer Kevin Carroll wasn't surprised. The industry, he says, "knew this was coming. And isn't it wonderful that it's here?"

For Carroll, 49, who has been developing and fitting artificial limbs for more than 25 years, the IAAF's decision was not so much a setback as a welcome reminder of how far prosthetics...

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