Final answer:
Interval training involves alternating periods of high-intensity exercise with periods of lower-intensity exercise or rest to improve cardiovascular fitness, burn calories, and build endurance.
Step-by-step explanation:
When instructing interval training, it means that you should guide the individual on how to perform exercise intervals with a specific work and rest ratio. Interval training involves alternating periods of high-intensity exercise with periods of lower-intensity exercise or rest. The goal is to improve cardiovascular fitness, burn calories, and build endurance. For example, a common interval training workout could include 1 minute of high-intensity exercise followed by 30 seconds of rest, repeated for a certain number of sets or minutes.