The ideal heart rate zone for fat burning typically falls between 60% to 70% of an individual's maximum heart rate. This level promotes the use of fat as a primary energy source, supporting weight loss and improved endurance. Exercising within this zone maximizes fat oxidation while still allowing for sustainable exercise duration. It's important for individuals to monitor their heart rates to tailor workouts effectively for their fitness objectives, as exceeding this zone may shift energy use more towards carbohydrates.