Circuit training is a type of physical exercise that involves performing a series of exercises in succession, without resting between each one. The goal is to complete all the exercises within a set time frame or number of repetitions, and then move on to the next circuit. This type of workout is designed to improve cardiovascular endurance, muscular strength, and flexibility simultaneously. Circuit training can be done with various types of equipment such as weights, resistance bands, medicine balls, or even bodyweight exercises like push-ups, squats, and lunges. The routines are typically structured so that the exercises target different muscle groups in a specific order to maximize results while minimizing injury risk.