When Michael Phelps Was Just a Teenager | Before They Were Superstars

A trip back to Baltimore to see a young Michael Phelps reveal his brutal training regime shows why the swimming legend won 23 Olympic gold medals and became the greatest swimmer of all time.

Visit the Olympic Channel, where the Games never end: http://www.olympicchannel.com

Subscribe to the official Olympic channel here: http://bit.ly/1dn6AV5


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