Consists of harder bouts of exercise (work cycles) interspersed with easier bouts of exercise (recovery cycles).
An aerobic and/or anaerobic workout that consists of three elements: a selected work interval (usually a distance), a target time for that distance, and a predetermined recovery period before the next repetition of the work interval.
Alternate periods of rigorous activity and reduced activity.
A form of physical conditioning in which periods of high-intensity exercise alternate with periods of lesser exertion or rest and recovery.
Anaerobic method of conditioning that alternates short, high-intensity exercise bouts with short rest periods.