Vương (cotcac)

Race #3539

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Official speed 51.08 wpm (79.64 seconds elapsed during race)
Race Start March 27, 2011 10:31:39am UTC
Race Finish March 27, 2011 10:32:59am UTC
Outcome No win (1 of 1)
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.