mohammed (faizan4979)

Race #75

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Official speed 38.54 wpm (105.55 seconds elapsed during race)
Race Start January 2, 2014 11:09:06am UTC
Race Finish January 2, 2014 11:10:51am UTC
Outcome Win (1 of 4)
Accuracy 90.0%
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.