First lady Michelle Obama uses a jump- rope during exercise activities at an event highlighting the work of the Physical Fitness Council on Wednesday, June 23, 2010, at the Columbia Heights Education Campus Bell Multicultural High School in Washington. (AP Photo/Pablo Martinez Monsivais)

Photo by: Pablo Martinez Monsivais

First lady Michelle Obama uses a jump- rope during exercise activities at an event highlighting the work of the Physical Fitness Council on Wednesday, June 23, 2010, at the Columbia Heights Education Campus Bell Multicultural High School in Washington. (AP Photo/Pablo Martinez Monsivais)