**Interval workouts** maximize calorie burn by alternating between high intensity and low intensity efforts. This method, known as High-Intensity Interval Training (HIIT), elevates the heart rate efficiently, leading to increased metabolic rate both during and after the workout, a phenomenon referred to as afterburn effect. By incorporating varied intensity levels, interval workouts also enhance cardiovascular fitness and improve stamina. Furthermore, the time-efficient nature of these workouts makes them appealing for those with busy schedules, allowing for significant calorie expenditure in shorter sessions.