What is one way to measure exercise intensity?

Heart rate monitoring is a widely recognized and effective method for measuring exercise intensity. The heart rate reflects how hard the cardiovascular system is working during physical activity. As exercise intensity increases, the heart rate typically rises to supply more oxygen to the muscles. By monitoring heart rate, individuals can gauge whether they are working at low, moderate, or high intensity, often using percentage ranges of their maximum heart rate for guidance.

This method allows for personalized training that can enhance cardiovascular fitness, weight management, and overall performance. It is especially useful because it provides real-time feedback and can guide adjustments in exercise intensity to meet specific fitness goals. In contrast, the other options do not measure exercise intensity directly: body temperature measurement can indicate overall thermal responses to exercise but not necessarily intensity; timing duration only tracks how long someone exercises without assessing how hard they are working; and weight measurement gives information about total mass but does not relate to the exertion level during physical activity.