A combination of endurance and resistance training. It is composed of medium to high intensity exercises targeting different major muscle groups. It is a time based workout with rest intervals after each exercise. Taking circuit training helps your arms, legs glutes, core, etc. If you weigh 150 lbs, you can burn approximately 285 calories in 30 minutes. If you weigh 200 lbs, you can burn approximately 380 calories in 30 minutes.