squat jumps, pushups,
jumping rope, tricep dips, lunges,
jumping jacks, abdominal crunches and burpees. Give yourself 15 seconds to move from one exercise to another, but do not take any additional breaks. Do the exercises as fast as you can, trying to keep up a high intensity throughout the circuit. After one full circuit, take a three- to five-minute break before repeating the circuit again two more times. The whole workout will take 40 to 50 minutes with the warm-up.