Which heart rate zone is optimal for fat burning?

The optimal heart rate zone for fat burning is in the range of 60-70% of maximum heart rate. In this zone, the body primarily utilizes fat as a source of fuel rather than carbohydrates, which is essentially the body's preferred energy source during more intense exercise. This moderate intensity level promotes fat oxidation efficiently, making it ideal for individuals aiming to lose weight or improve their body composition.

Training in this zone also encourages cardiovascular health without overly straining the body, allowing for longer training sessions with reduced risk for injury. It strikes a balance between intensity and sustainability, enabling individuals to exercise for longer durations, which can further increase total caloric expenditure and fat loss over time.

The other ranges represent higher levels of intensity, where the body begins to rely more on carbohydrates for energy. While all intensity levels can contribute to physical fitness and weight loss, the specific focus on fat oxidation is most prevalent at the moderate intensity represented by the correct choice.