Build muscle and get your heart rate up with this quick and effective FULL BODY HIIT Circuit Workout! Each high-intensity interval training circuit contains 4 exercises: an upper body, lower body, core and cardio exercise. You can do this HIIT circuit at home or at the gym -- all you need is a set of dumbbells! 12 full body exercises completed in 40 second work intervals, followed by 20 second recovery periods. Add this HIIT workout to your workout routine 1-2 times a week!
