From: The Foot Orthoses versus Hip eXercises (FOHX) trial for patellofemoral pain: a protocol for a randomized clinical trial to determine if foot mobility is associated with better outcomes from foot orthoses
1-10 Borg Scale of Perceived Exertion
0
Rest
1
Really Easy
2
Easy
3
Moderate
4
Sort of Hard
5
Hard
6
7
Really Hard
8
9
Really, Really Hard
10
Maximal