Rating of Perceived Exertion (RPE)
The most common RPE scales are the Borg 6-20 and Category-Ratio Scales.
Borg 6-20 RPE Scale
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Category-Ratio Scale
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6 | No exertion at all | 0 | Nothing at all | |
7 | Very, very light | 0.3 | ||
8 | 0.5 | |||
9 | Very light | 0.7 | ||
10 | ‘Conversational pace’ | 1 | Very weak | |
11 | Fairly light | 1.5 | ||
12 | Weak | |||
13 | Somewhat hard | 2.5 | ||
14 | Moderate | |||
15 | Hard | |||
16 | Strong | |||
17 | Very hard | 6 | ||
18 | Very strong | |||
19 | Very, very hard | 8 | ||
20 | 9 | |||
10 | Extremely strong | |||
11 | ||||
* | Absolute maximum |