Having a target heart rate zone means exercising at a specific intensity that is optimal for improving cardiovascular fitness and burning fat. This zone is typically expressed as a percentage of an individual’s maximum heart rate, which can be estimated as 220 minus the person’s age. Training within this zone ensures that the body is efficiently utilizing energy systems, enhancing aerobic capacity while minimizing excessive strain. Monitoring heart rate during exercise helps individuals maintain their intensity within the target zone, facilitating effective workouts and progress toward fitness goals.