<Li> The study did not use VO data to develop the equation . </Li> <Li> Only six subjects were used, and the correlation between the percentages of HR and VO max was not statistically significant . </Li> <P> For healthy people, the Target Heart Rate or Training Heart Rate (THR) is a desired range of heart rate reached during aerobic exercise which enables one's heart and lungs to receive the most benefit from a workout . This theoretical range varies based mostly on age; however, a person's physical condition, sex, and previous training also are used in the calculation . Below are two ways to calculate one's THR . In each of these methods, there is an element called "intensity" which is expressed as a percentage . The THR can be calculated as a range of 65--85% intensity . However, it is crucial to derive an accurate HR to ensure these calculations are meaningful . </P> <P> Example for someone with a HR of 180 (age 40, estimating HR As 220 − age): </P>

What is the correct definition of target heart rate range