Changes

There are various scales that he used to gauge exercise intensity. The most famous is Borg's 15 point Rating of Perceived Exertion (RPE). Another RPE scale by Borg is the 10 point Category Ratio scale (CR10), sometime CR10 is called the "modified RPE scale". RPE can be used to calculate the difficulty of the training as [[TRIMP]] and is related to [[The Ivan Scale Of Perceived Suffering]].