What is a benefit of high-intensity interval training (HIIT)?

High-intensity interval training (HIIT) is designed to enhance cardiovascular fitness effectively and efficiently in a relatively short amount of time. This type of training involves alternating short bursts of intense exercise with periods of rest or lower-intensity exercise, which leads to significant improvements in aerobic and anaerobic capacity. The short bursts push the heart rate into higher zones, which stimulates various cardiovascular adaptations, such as increased stroke volume and improved oxygen delivery.

Moreover, the structure of HIIT workouts allows individuals to achieve similar or even greater cardiovascular benefits compared to traditional steady-state cardio exercises, often in a fraction of the time. This efficiency makes it an appealing option for those seeking to improve their fitness with time constraints.

The other choices do not accurately represent the characteristics or outcomes of HIIT. For instance, HIIT does not focus solely on muscular strength; instead, it incorporates various training modalities. Additionally, HIIT routines typically consist of shorter sessions, with workouts often lasting 20 to 30 minutes, contradicting the idea of requiring long workout sessions. Lastly, HIIT can promote endurance, especially given that it trains both aerobic and anaerobic systems simultaneously, enhancing overall stamina and performance.