The primary goal of high-intensity interval training (HIIT) is to improve cardiovascular fitness, boost metabolism, and enhance overall physical performance through short, intense bursts of exercise followed by rest periods. HIIT maximizes calorie burn in a shorter time, elevating the heart rate significantly, making it efficient for those with limited time. This training method can lead to increased aerobic and anaerobic capacity, ultimately aiding in better fitness outcomes and potentially supporting weight loss goals.