Rate

Description

1

Rest

2

Extremely low effort

mild

3

Low effort

4

Very comfortable but noticeably working

moderate

5

Comfortable but working

6

Slightly uncomfortable, breathing regular

vigorous

7

Uncomfortable can talk but must stop talking to catch breath

8

High effort, cannot talk

Extreme/

9

Approaching extreme, difficult to breathe

maximum

10

Extreme effort, cannot continue