Turns out pushups are more telling than treadmill tests when it comes to cardiovascular health.

Airman 1st Class Justin Baker completes another push-up during the First Sergeants' push-up a-thon June 28, 2011, Eielson Air Force Base, Alaska. Participants were allowed 10 minutes to do as many push-ups as they could during the fundraiser. Airman Baker, a contract specialist assigned to the 354th Contracting Squadron, completed 278 push-ups. (U.S. Air Force photo/Airman 1st Class Janine Thibault)