A physical training uniform is a military or organizational 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). Most militaries, especially the United States Armed Forces and their auxiliaries (e.g. ROTC and JROTC components) require use of a physical training (PT) uniform during unit exercise (including formation runs, calisthenics, and conditioning exercises). All items worn by military personnel conducting PT as a group are subject to uniformity, at commander discretions, however, some U.S. 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 also be conducted in that branch's utility uniforms, normally with the blouse removed and the undershirt exposed (also known as "boots and utes" ). For unit runs, esprit de corps or special occasions, commanders may have personnel wear unique T-shirts with the distinctive unit insignia and unit colors.

Physical training uniforms of the United States Armed Forces

Army

The Army Physical Fitness Uniform (APFU) consists of:

Marine Corps

The Marine Corps PTUs consist of:

Navy

The Navy PTUs consist of: The Navy announced that an additional standard navy blue uniform is in development with a not-yet-known design, and a retirement date for the gold-shirt uniform pending.

Air Force

The Air Force Physical Training Gear (AFPTG) consists of: A retirement period for the IPTU is currently taking place until 2026, after 20 years of use.

Space Force

The Space Force PTU consists of:

Coast Guard

The Coast Guard PTUs consist of:

Non-military use

In many parts of the world outside of use in militaries, physical training uniforms are primarily used in schools, law enforcement academies, and in some cases, scouting, firefighter training and prison systems.