A practical scale
RIR turns set effort into a number that can travel with load and reps.
| RIR | Plain-language meaning |
|---|---|
| 0 | No further acceptable repetition. |
| 1 | About one repetition remained. |
| 2 | About two repetitions remained. |
| 3+ | A clearly submaximal set. |
Accuracy is learned
RIR is subjective. Experience, exercise choice, rep range and fatigue can change estimate quality. Treat it as useful context rather than an instrument reading.
How to calibrate
Occasionally compare a predicted RIR with a safe set taken closer to the planned stopping point. Record the miss, then use later sessions to improve the estimate without turning every set into a test.