What training method is characterized by alternating workout intensity?

The training method characterized by alternating workout intensity is interval training. This approach involves alternating periods of high-intensity exercise with periods of lower intensity or rest. This fluctuation in intensity not only enhances cardiovascular fitness but also helps improve overall endurance and performance. By incorporating bursts of high intensity, participants can maximize calorie burn and improve their aerobic and anaerobic systems effectively.

Interval training is often favored because it allows for more varied workouts which can prevent boredom, increase adherence to exercise programs, and lead to improved results in a shorter amount of time compared to steady-state approaches. In contrast, the other options describe different training methods that don't specifically focus on the alternation of intensity in the same manner.