Calisthenics are a form of systematic exercise consisting of a variety of simple movements--performed without weights or equipment--that are intended to increase body strength and flexibility using the weight of one's own body for resistance.
Calisthenics are a form of dynamic exercise consisting of a variety of simple, often rhythmical, movements, generally using minimal equipment or apparatus. They are intended to increase body strength and flexibility with movements such as bending, jumping, swinging, twisting or kicking, using only one's body weight for resistance.