Term Definition Example
Reps (Repetitions) A single instance of a movement One hang on the fingerboard
Sets A group of repetitions 8 reps of fingerboard max hangs = 1 set
Work Time Duration spent performing the movement during each rep. If no rest time indicated, rest should be part of the work time 10 seconds per hang for max hangs
Inter-Rep Rest Time rested between repetitions Commonly 4-6 minutes between hangs for max hangs
Inter-Set Rest Break between sets Not applicable for single-set max hangs
Rate of Fatigue (ROF) Rate of Fatigue refers to how tired you feel from the physical effort during the session. After climbing 15 intense problems, your arms feel pumped but you can still push for more—that’s around a 7/10 ROF. (Subjective)
Rate of Perceived Exertion (RPE) RPE is a subjective scale used to measure the intensity of physical effort during an activity. Typically rated from 1 to 10, it reflects how hard a person feels they are working based on factors like heart rate, muscle fatigue, and overall exertion.
1-3 RPE: Light activity, like walking at an easy pace.
4-6 RPE: Moderate effort where you can maintain the activity for a while, but it requires focus.
7-9 RPE: Intense work where you’re nearing your limits and speaking becomes difficult.
10 RPE: Maximum effort—your absolute limit.
**** If you’re working on a boulder problem at 80% intensity, aiming for an 8/10 RPE, you should feel like the climb is challenging but still doable with effort. Success might require a few attempts, and you’ll need good rest between tries to maintain that level of intensity.