Which factor is important when determining target heart rate?

Determining target heart rate is crucial for setting effective exercise intensity goals, and age plays a significant role in this calculation. As individuals age, their maximum heart rate tends to decrease. This is reflected in standard formulas for calculating target heart rate, such as the commonly used formula: 220 minus the individual's age.

This formula allows individuals to find their estimated maximum heart rate, which is essential for establishing training zones that are safe and effective for cardiovascular benefit. Since target heart rates are often set as a percentage of the maximum heart rate—typically between 50-85% for aerobic exercise—understanding one's age helps in accurately pinpointing the appropriate heart rate range for safe and effective exercise.

Other factors, such as muscle fiber type, altitude level, and body mass index (BMI), may influence exercise performance and overall health but do not directly relate to the calculation of target heart rate in the same way that age does.