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Race #2870

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Official speed 89.21 wpm (45.60 seconds elapsed during race)
Race Start July 26, 2013 12:15:53pm UTC
Race Finish July 26, 2013 12:16:39pm UTC
Outcome Win (1 of 4)
Accuracy 91.0%
Points 0.00
Text #408 (Length: 339 characters)

There are two kinds of fibers in our muscles, red and white. When an athlete trains for long distance running, he or she builds more red muscle fibers than white muscle fibers in his calf muscles. A sprinter has more white muscles. If you retrain a marathon runner to be a sprinter, most of the muscle fibers will convert to white muscles.