This is an exercise program where multiple exercises are group together, thus establishing the circuit. These exercises are performed one after the other in rapid succession. It is recommended to establish exercises in the circuit that target different muscle groups with as little overlap as possible.
An example of a training circuit would be bicep curls, tricep extensions, military press, leg curls, leg extensions, bench press, and seated rows. Performing this many exercises quickly is exhausting and often difficult, especially in a gym location where equipment is not reserved once you leave that station.