I love using a 1-to-10 scale. It’s a fast way to get a read on just about anything, and exercise is no exception. During appointments with clients, I use a 1-to-10 scale to check effort and intensity throughout all parts of the workout.
The rating scale on a strength move goes like this:
1-2: Very easy; don’t really feel it.
3-4: Feels good; I could do this for a while.
5-6: Feeling it start to burn.
7-8: It is burning at an increasing rate.
9-10: It is very intense, with a deep burn; I’m not sure how much more I can do.