Interval training is an exercise program that intersperses intense physical activity with periods of rest

Interval training is indeed an exercise program that combines phases of intense activity with periods of rest. This type of training is more efficient in fat loss and muscle building than regular cardiovascular and aerobic exercises that extend for longer periods of time are. This is because the level of difficulty is higher with this type of program and it also keeps heart rate at a higher level while the exertion continues. Therefore, these exercise programs induce the production of hormones that allow for better fat loss and muscle building.