High-intensity interval training (HIIT) can significantly benefit cardiovascular health by improving heart efficiency and overall aerobic capacity. Research shows that short, intense bursts of exercise followed by recovery periods can enhance cardiovascular endurance more effectively than steady-state cardio. HIIT workouts promote improved blood circulation, decrease blood pressure, and can lead to better metabolic health. This form of training helps the body adapt to higher levels of exertion, thereby positively influencing overall cardiovascular fitness. Additionally, because HIIT often requires less time, it can be a viable option for those with busy schedules.