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Biomechanics—the application of engineering principles to the motions of the human body—stands at the heart of much of the curre

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问题     Biomechanics—the application of engineering principles to the motions of the human body—stands at the heart of much of the current work in training athletes. At the U. S. Olympic Committee Biomechanics Laboratory in Colorado Springs, experts use a computerized "force platform" to measure both the magnitude(巨人)and direction of body forces as an athlete runs, lifts and throws. This information can tell an athlete such as a discus(铁饼)thrower whether he performs better when more weight is placed on the front or back foot.
    The U. S. Cycling Federation relies on biomechanical analysis to measure the force applied to pedals by cyclists. "We can tell if one leg is using more force than the other and how effective a rider’ s pedaling motion is, " says Edmund Burke of the federation.
    Marathoner Tony Sandoval benefited from biomechanics in a different way. Troubled by tendinitis(腱炎)and unable to figure out the cause, he went to specialists who analyzed his running movements and found he was rotating his ankle excessively when landing and thus inflaming tendons. Additional analysis showed this occurred because his lower leg muscles, which should stabilize the ankle, were weak. He went on a muscles-strengthening program, and now everything is back to normal.
We can infer that______.
选项 A、every marathoner would suffer from tendinitis
B、Edmund Burke was a famous cyclist
C、an athlete can benefit from biomechanics
D、without biomechanics, American athletes can’t make any progress
答案C
解析
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