Changes

This scale was based on earlier work where it was noted that there was a correlation between [[Heart Rate]] and perceived exertion. Based on this observation, Borg created a scale that roughly equates to 1/10 the [[Heart Rate]] of the healthy middle-aged male. This scale starts at 6, as 60 is roughly the resting [[Heart Rate]] of a healthy individual. The top end of the scale is a 20, which again approximates the maximum [[Heart Rate]] of 200. (Note that actual resting and [[Maximum Heart Rate|maximum heart rates ]] vary a lot and the values of 60 and 200 are broad generalizations.)