HIIT stands for High-Intensity Interval Training, a workout technique that alternates short bursts of intense exercise with periods of rest or lower-intensity activity. This training method effectively boosts cardiovascular fitness, increases metabolism, and burns calories in a shorter timeframe compared to traditional steady-state cardio. HIIT workouts can be adapted to various fitness levels and utilize body weight or equipment, making them versatile and engaging. Due to the intense nature of HIIT, participants often experience improved endurance and strength while enjoying a time-efficient workout.