calisthenics

Physical exercises with the participation of a multitude of muscles and often minimal equipment (thus, usually bodyweight exercises); strength training aspects and cardio aspects are both involved, and stamina is often a focus.in-pluralpluralsingular

• Just before sacktime, the Captain stood beside his sleeping bag doing his daily calisthenics; stripped down to his flaming red long johns, […]

A system of such exercises.pluralsingular