Rating Descriptor 6 No Exertion at all 7 Extremely Light 8 - 9 Very Light 10 - 11 Light 12 - 13 Somewhat Hard 14 - 15 Hard (Heavy) 16 - 17 Very Hard 18 - 19 Extremely Hard 20 Maximal Exertion

Table 2: Borg 15-point RPE scale.