First Lady Michelle Obama talks the talk and walks the walk.

When the 48-year-old campaigns for the importance of health and physical fitness, she leads by example, as she proved today on The Ellen DeGeneres Show in L.A.

Michelle Obama accepted a bold challenge by DeGeneres to see who could do the most push-ups, with both women flinging off their dress coats on the spot.

Who won? Watch the video here and see!