The recommended target heart rate zone for effective cardio training typically ranges from 50% to 85% of an individual’s maximum heart rate. This is usually calculated by subtracting one's age from 220 to find the maximum heart rate. Staying within this zone allows individuals to maximize the benefits of aerobic exercises, improving cardiovascular fitness and endurance. Training consistently within the target heart rate zone facilitates optimal fat oxidation and helps in building stamina over time. Regularly monitoring heart rate ensures that workouts are efficient and aligned with fitness goals.