Dec 20, 2015 Legs, butt + abs cardio circuit Fitness Created this circuit with a focus on the lower body and abs. Full routine below: 5-10min warm-up (I danced for this circuit. You can do anything that will get your heart rate up. Some good ideas are skipping, jogging, star jumps, knee up runs, anything on a cardio machine at the gym) 20 x block jumps 30 x bicycle crunches 20 x 10kg squats 20 x jump lunges 20 Russian folk squats Repeat all 3 x with 60sec rest between each set. 5-10min cool down with stretch. Note: this is considered intermediate – advanced.