AdvertisementThe Science Behind Olympic Six-Pack AbsAugust 03, 2012Jessica Stoller-ConradfacebookEmailSwimmers Michael Phelps and Ryan Lochte deploy their muscles to win medals for the United States at the 2012 London Olympic Games. (AFP/Getty Images)
Swimmers Michael Phelps and Ryan Lochte deploy their muscles to win medals for the United States at the 2012 London Olympic Games. (AFP/Getty Images)