• GYM CLASS photo | Michelle Obama

Credit: Jeff Haynes/Reuters/Landov

Published: Friday March 01, 2013 06:00 AM EST



Consider them movers and shakers! First Lady Michelle Obama, tennis ace Serena Williams and San Francisco 49ers quarterback Colin Kaepernick get pumped during an event Thursday in Chicago to promote physical activity in schools across the nation.

Stay in the know about Michelle Obama by subscribing now.