Push-ups and pull-ups are timeless bodyweight moves that build strength, improve posture, and enhance daily function. They engage multiple muscle groups, require no fancy equipment, and can be adapted ...

Air Force Senior Airman Brandon Stout, 380th Expeditionary Civil Engineer Squadron, does pull-ups during a workout at an undisclosed location in Southwest Asia on Sept. 11, 2013. (Staff Sgt. Joshua J.