COMMERCIAL IMAGE - Olympian and mom Summer Sanders encourages exercise class participants during the launch of the GE HealthyShare App for Facebook, Tuesday, June 19, 2012, in New York. Visit www.Facebook.com/Healthy to join and encourage your friends to take a step towards better health. (Photo by Diane Bondareff/Invision for GE/AP Images)
COMMERCIAL IMAGE - Olympian and mom Summer Sanders encourages exercise class participants during the launch of the GE HealthyShare App for Facebook, Tuesday, June 19, 2012, in New York. Visit www.Facebook.com/Healthy to join and encourage your friends to take a step towards better health. (Photo by Diane Bondareff/Invision for GE/AP Images)
