<P> A physical training uniform is a military uniform used during exercise, calisthenics, drills, and in some cases, very casual periods of time (off - duty time during Initial Entry Training in the U.S. Army, for example). The United States Army, Marine Corps, Navy, Air Force, and Coast Guard require use of a physical training (PT) uniform during unit exercise (including formation runs, calisthenics, and conditioning exercises). Some military units produce unique T - shirts with their unit insignia and motto, and for special events, this shirt is part of the uniform . Occasionally, exercise will be conducted in that branch's utility uniforms, normally with the blouse removed and the undershirt exposed (also known as "boots and utes"). </P> <P> The Army Physical Fitness Uniform (APFU) consists of: </P>

What does pt stand for in the army