High-Intensity Interval Training (HIIT) is a type of fitness training that involves bursts of high-intensity effort followed by brief rest periods. This training approach is effective for improving cardiovascular fitness, building endurance, and burning calories in a shorter time frame compared to traditional steady-state exercise. HIIT can be adapted to various fitness levels and does not necessarily require specialized equipment, making it accessible. The intensity and variability of HIIT workouts can lead to enhanced metabolic rates post-exercise, resulting in more calories burned even after the workout has ended.