Which of the following is NOT a purpose of taking your heart rate?

Taking your heart rate serves various purposes related to cardiovascular fitness and exercise intensity. One of the primary uses of heart rate monitoring is to determine workout intensity. By measuring heart rate, individuals can assess whether they are within their target heart rate zone, which reflects the intensity of their workout and helps in achieving specific fitness goals.

Additionally, monitoring heart rate plays a crucial role in assessing how hard the heart is working during exercise. This provides essential feedback on cardiovascular function and can guide adjustments to training segments for optimal performance and health benefits. Over time, tracking heart rate can also help monitor improvements in cardiorespiratory fitness, as a lower resting heart rate or a quicker recovery rate after exercise often indicates improved fitness.

In contrast, monitoring improvements in flexibility does not involve heart rate. Flexibility is assessed through different means, such as measuring the range of motion in joints or performing flexibility tests, which are unrelated to heart rate. Therefore, this choice stands out as not being a purpose related to heart rate monitoring.