Heart rate zones have become increasingly popular in recent years as a means of measuring exercise intensity, particularly due to the prevalence of wearable heart rate technology. However, while heart rate can provide an objective measure of intensity, it is not without its limitations.

As an exercise science researcher, I support the American College of Sports Medicine’s recommendation of a minimum of 150 minutes per week of moderate aerobic exercise, or 75 minutes per week of high-intensity exercise. However, it’s important to understand what exercise intensity really means.

There is a direct correlation between heart rate and exercise intensity, with heart rate increasing as exercise intensity rises. Heart rate zone training aims to offer an objective measure of intensity by dividing it into different zones. However, it’s essential to note that heart rate can be influenced by factors such as temperature, medications, and stress levels, potentially affecting readings during exercise.

While heart rate zone training provides a standardized approach to measuring exercise intensity, it’s crucial to recognize that individual interpretations of exercise intensity may vary. What one person perceives as ‘moderate’ may differ from another’s perception of ‘vigorous.’

Although heart rate zone training has its advantages, it’s important to acknowledge its limitations and the potential impact of external factors on heart rate readings during exercise. Ultimately, maintaining a consistent exercise routine, regardless of the preferred intensity, is key to promoting cardiovascular health and overall fitness.