በተገመተው መግለጫ መካከል እውነተኛ መግለጫ ሲደረግ የሚደረገው ደንብ... በጣም የተገነዘበው... ለመረዳት ቀላል አይደለም ።
Understanding Perceived Exertion is really the answer...and it's really not too difficult to understand with a little guidance.