There is no rest between sets, and only a very brief pause after the completion of the two sets. You continue this pattern until you've worked all the major muscle groups three to four times. Other possibilities include stationary cycling, jumping rope and stairstepping equipment. Walking is not recommended, as it doesn't increase the heart rate fast or high enough. Again, you continue until you've worked all the major muscle groups three to four times.
Circuit training is recommended for people who want to strengthen their hearts and lose body fat.
The intermittent aerobic exercise keeps the heart rate up, which better promotes fat burning. Peripheral heart training does not burn body fat quite as effectively. Both systems are equally effective at building muscle. Of the two ways to do this exercise, both are equally effective at strengthening the biceps muscle in the upper arm. When you hold the weights with the palms facing forward, in a supinated grip, there is more muscle involved in the movement, but this position makes the curls harder to execute and therefore limits the number of reps you can do.