Dustin (duyxngoc)

Race #342

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Official speed 108.17 wpm (37.61 seconds elapsed during race)
Race Start November 17, 2009 12:21:15am UTC
Race Finish November 17, 2009 12:21:53am UTC
Outcome Win (1 of 5)
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.