ROANOKE, Virginia, March 25 -- The Fralin Biomedical Research Institute at Virginia Tech posted the following news:

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Understanding how cells adapt after exercise

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As a professional sprinter for more than 10 years, Xuansong Mao specialized in the 100-yard dash. When Mao wasn't racing, he was training for a race.

As that chapter of his life came to a close, Mao hoped the next would still revolve around running.