It was an invitation to speak at the 2007 New York marathon that first inspired Zanardi to try handcycling.
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Alex Zinardi, a race car driver who lost both of his legs in a crash, is a Paralympic gold medal winner in handcycling.
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With only a month's preparation, he finished fourth in his division, discovering that, not only was handcycling a great way to keep fit, but it also allowed him to apply his knowledge of aerodynamics.