When I was active duty, before we went to an, um, er, interesting location, we qualified by running a 25yd sprint to the firing line, firing 2 shots, running back, firing 2 shots, etc. until a 30 round mag was empty. It was supposed to simulate firing under stress. This was a semi-urban environment, so we shot mostly 15-30yds. Even at this close range, most scores went WAY down (No one ever accused us airmen of being in shape). It was good training, though.
EDIT: Oh, yeah. The M16 was put on safe and placed on a table during sprints. They sure didn't trust us running with a hot weapon.