1- Circuit training is a form of body conditioning that involves endurance training, resistance training, high-intensity aerobics, and exercises performed in a circuit, similar to High-intensity interval training.
2- Improvements in cardiovascular fitness.
Improvements in muscular strength.
Improvements in muscular endurance.
Increased social interaction during a workout.
Increased adherence to exercise.
3- Ideally, circuit training is best completed 2-3 times per week to achieve the best results.
4- An example of a simple circuit training workout might consist of push-ups, sit-ups, squats, chin-ups and lunges.
Hope this helps:)