yu (piaoyi)

Race #381

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Official speed 59.45 wpm (68.43 seconds elapsed during race)
Race Start March 1, 2019 10:44:56am UTC
Race Finish March 1, 2019 10:46:05am UTC
Outcome No win (3 of 5)
Accuracy 97.0%
Points 61.43
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.