@casarobin: @FitnessGov #AskPCFSN does riding a bike exasperate a badly torn hamstring? Can't sit still ;-) #ouch #fitness #nutrition
Consult your physician about your pain. Also, check out bit.ly/P45Byq for alternative exercises to help you be active!
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By President’s Council on Fitness, Sports and Nutrition (PCFSN)
By Allyson Felix