yo (doei)

Race #922

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Official speed 78.00 wpm (52.15 seconds elapsed during race)
Race Start April 3, 2016 11:56:18pm UTC
Race Finish April 3, 2016 11:57:10pm UTC
Outcome Win (1 of 3)
Accuracy 96.0%
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.