The officer must sit and drive for extended periods; stand and walk for long intervals; run, sprint, climb stairs, fences, and obstacles, jump, crawl, bend, stoop, kneel, and reach; pursue and physically subdue resisting persons; apply restraints; lift, carry, push, or pull up to 50 pounds routinely and more than 100 pounds with assistance, including dragging or carrying an injured person to safety; and sustain physical exertion under stress. The officer patrols an assigned area in a marked vehicle or on foot; responds to calls for service and emergencies; conducts traffic enforcement and accident investigations; investigates criminal offenses and gathers, preserves, and documents evidence; makes arrests and serves warrants and civil process; prepares detailed written reports; and testifies in court.