What does RPE mean in strength training?
RPE means rating of perceived exertion. In a strength-training log, the repetitions-in-reserve version describes how close a set felt to your repetition limit. RIR means the additional reps you believe you could have completed with the same technique.
RPE adds context to weight and reps. Two sets of 80 kg × 8 can look identical in a log while feeling very different. Recording effort helps you notice that difference; it does not measure strength directly.
A practical RPE and RIR reference
| RPE | Reps left with the same technique |
|---|---|
| 10 | 0 — no further rep |
| 9 | About 1 |
| 8 | About 2 |
| 7 | About 3 |
| 6 | About 4 or more |
These are estimates, not a test result. Half-point ratings let you record an in-between judgement, but they do not make the estimate objectively precise. Setlane offers 6–10 in half-point steps for manual set logging; this is not the older Borg 6–20 scale.
Research on the RIR-based RPE scale relates ratings to proximity to failure. Accuracy varies with experience, the exercise and the set. Treat the number as your observation, not proof of an exact number of remaining reps.
How to record RPE consistently
- Finish the set before rating it. Record the effort you actually experienced, not the target written in your programme.
- Think about additional reps with the same range of motion and technique. Do not count reps that would require changing the movement.
- Log weight, reps and RPE together. Add a short note if rest time, equipment or technique changed.
- Compare similar sets across several sessions. A single difficult day is not enough to establish a trend.
Same weight and reps, different effort
| Session | Weight | Reps | RPE |
|---|---|---|---|
| 1 | 80 kg | 8 | 9 |
| 2 | 80 kg | 8 | 8.5 |
| 3 | 80 kg | 8 | 8 |
If technique, rest and equipment were comparable, the declining RPE suggests the same task felt easier. That is useful context alongside your weight and rep records. It does not by itself prove a new 1RM or tell you exactly how much weight to add.
Follow the progression rule in your programme. If effort rises unexpectedly, review the surrounding sessions and notes before changing the plan.
Record set difficulty in Setlane
Turn RPE on in Settings, then record the rating alongside a set during your workout. RPE logging is included in Free. Use the same approach consistently so your history contains comparable observations.
The Epley estimate in Setlane uses weight and completed reps; it does not adjust for RPE. An easy set and a hard set with identical weight and reps produce the same Epley estimate. Keep effort as a separate piece of context.
Track progressive overload · Understand estimated 1RM · Understand workout volume
Common logging mistakes
Avoid changing ratings to make your log look more consistent. Do not equate heavy breathing with proximity to muscular failure, or compare different exercises as if the same RPE implied the same weight. A rating describes effort for that particular set.
Keep target RPE and recorded RPE separate. “Aim for 8” is an instruction; “felt like 9” is the result. The difference is useful information rather than a reason to rewrite what happened.
Frequently asked questions
Is RPE 8 the same as 80% of my maximum?
No. RPE 8 describes effort, commonly about two reps in reserve. It is not a fixed percentage of one-rep max.
Do I need to train to failure to record RPE?
No. RPE is an estimate of how close the set felt to your limit. Logging it does not require performing extra reps to test that estimate.
Does Setlane change my e1RM based on RPE?
No. Its Epley calculation uses the weight and completed reps. RPE is recorded separately.
Sources
Zourdos et al.: resistance-training RPE scale (2016) · Helms et al.: applying the RIR-based RPE scale (2016)