Lifting RPE: what RPE 7, 8 and 9 mean under the bar

"3 sets of 5 at RPE 8." Half the gym reads that and nods. The other half quietly loads whatever they lifted last week and hopes nobody asks.

Here's what it means. Lifting RPE is a 1–10 rating of how hard a set was, and in the gym it's usually tied to one specific question: how many more reps could you have done? RPE 8 means about two more. RPE 9 means one. RPE 10 means none. That's the whole answer to "what does RPE mean in lifting", and it's why RPE is how exrsz's adaptive plans prescribe strength work: the target stays the same while the weight moves with how you feel that day. This post covers what RPE 7, 8 and 9 actually feel like, how accurate you're likely to be, and how to use it without sandbagging every set.

What does RPE mean in lifting?

RPE stands for rating of perceived exertion. In running, it's a general sense of effort. In lifting, the useful version is anchored to reps in reserve (RIR): the number of reps you could still have done with good form before failing.

Zourdos and colleagues (2016) formalized this as a resistance-training-specific scale, with RPE 10 = 0 reps in reserve, RPE 9 = 1 rep in reserve, and so on. They concluded it's a practical way to regulate daily training load.

If you want the general scale first, including how it works for running and why the same 1–10 language helps in a mixed week, start with an RPE target explained from the top. It's also why a template like a free hybrid workout plan can write "squats at RPE 8" and "easy run at RPE 3–4" on the same page.

The lifting RPE scale

Many lifters also use half points: RPE 8.5 meaning "definitely one more, maybe two", RPE 9.5 meaning "no more reps, but maybe a touch more weight". That's coaching practice, and useful once whole numbers feel natural.

The lower end is deliberately vague. The scale as described by its developers groups 5–6 as roughly 4–6 reps in reserve, because people estimate far-from-failure sets less precisely (Helms et al., 2016).

What RPE 7, 8 and 9 feel like under the bar

RPE 7: three reps left

The bar moves well on every rep, including the last one. Your form doesn't change. You could keep going, and you know it. This is the right effort for technique-heavy sets, the first sets of the day, and most lifting during a hard running block.

RPE 8: two reps left

The last rep is noticeably slower than the first, but still crisp. Your brace and positions hold. If someone offered you twenty dollars for two more reps, you'd collect. This is the workhorse of most strength programs.

RPE 9: one rep left

The last rep is slow and takes real effort. One more would come out, slow but clean. Two would not. RPE 9 is for top sets, heavier singles, doubles and triples, and the final set of an exercise when you want to push.

The tell: bar speed

The most reliable cue isn't how you feel. It's how the bar moves. In the Zourdos study, slower average bar velocity went with higher RPE, with a strong inverse relationship in both experienced and novice squatters (Zourdos et al., 2016). If the last rep crawled, it wasn't an RPE 7, however you'd like to log it.

How accurate is lifting RPE?

Accurate enough to train with. Not accurate enough to trust blindly, especially early on.

• ›Experience helps. In the Zourdos study, experienced squatters rated their true one-rep max at 9.80 on average, close to the correct 10, while novices rated theirs at 8.96 (Helms et al., 2016, summarizing Zourdos et al., 2016). Beginners tend to think they have more left than they do.
• ›People are off by about a rep. A meta-analysis of 12 studies found that lifters underpredicted the number of reps left to failure by about one rep on average, with lots of variation. Predictions got slightly more accurate closer to failure and on sets of 12 reps or fewer (Halperin et al., 2022). In other words, on a typical set most people had a little more in the tank than they said.
• ›It works as a programming tool. In trained men following an eight-week squat and bench program with matched sets and reps, choosing loads by RPE produced strength gains at least as good as fixed percentages, with a likely small advantage for the RPE group (Helms et al., 2018).

The practical version: if you're new, log RPE on every set for a few weeks but keep using planned weights. Helms and colleagues suggest novices track it alongside normal training before relying on it to set the load (Helms et al., 2016). Every so often, take a safe exercise (machine, or with a spotter) to failure on the last set to check your calibration.

How to use RPE in your program

Picking the weight

The plan says 3 × 5 at RPE 8. You:

1. ›Warm up with gradually heavier sets, rating each one.
2. ›Pick a load you think gives you two reps in reserve after five.
3. ›Do the first working set. Rate it honestly.
4. ›Adjust: if it was really a 7, add a little weight. If it was a 9, take a little off.

That's autoregulation. On a great day, RPE 8 is heavier than planned. On a bad day, it's lighter, and you still get a productive session instead of a grind.

Top set and back-off sets

A common structure: one heavier set at RPE 8–9, then two or three back-off sets with slightly less weight at RPE 7–8. You get one hard exposure and quality volume without frying yourself.

Progression

RPE doesn't replace progression; it steers it. Over weeks, the weight you lift at RPE 8 should go up. If it isn't, the program, the recovery, or the honesty of your ratings needs a look.

Which RPE for which goal

These are coaching conventions, and most programs fall within them:

The power row follows Helms and colleagues' suggestion to stop heavy power sets roughly 2–3 reps short of failure (Helms et al., 2016). How many of these sets you need is a separate question; how many sets per workout explained covers the volume side.

Lifting RPE vs running RPE

Same scale, different anchor. In lifting, RPE is about reps left. In running, it's about breathing, talking and how long you could hold the effort. If you want the running side, what is RPE in running has the full scale.

The two do line up in one useful way: hard is hard. A squat session at RPE 8–9 and an interval run at RPE 8–9 both count as hard days, so space them out. On the running side, those RPE bands map onto the five training zones we use everywhere on this blog.

If you ever read research, you'll also meet the original Borg 6–20 scale. The 1–10 scale grew out of Borg's later category-ratio work (Borg, 1982), and for the gym, the RPE 6 20 scale is mostly a curiosity.

For how close to failure you should go on different lifts and goals, what are reps in reserve goes deeper, with the research on hypertrophy and strength.

Common lifting RPE mistakes

• ›Generous ratings. If the bar slowed to a crawl, it wasn't RPE 7.
• ›Rating the first rep, not the last. RPE is about what's left at the end of the set.
• ›Sandbagging forever. Never testing your calibration means your "RPE 8" drifts into RPE 6 over months.
• ›Grinding to RPE 10 every session. Occasional max efforts have a place. Living there is how people stall.
• ›Ignoring the run you did yesterday. Fatigue from intervals or a long run makes the same weight feel harder. That's exactly what RPE is supposed to capture, so let the load drop.

How exrsz uses lifting RPE

exrsz builds a periodized plan from your goal, schedule, level and equipment, and every lift comes with an RPE target in the same 1–10 language as your runs. It balances hard lifting against hard running in one plan, adapts each week to how you actually trained, and reshuffles missed sessions so you don't stack an RPE 9 squat day on top of intervals.

FAQ

What does RPE mean in lifting?

In lifting, RPE is a 1–10 rating of how hard a set was, usually based on reps in reserve: RPE 10 means no reps left, RPE 9 means one, RPE 8 means two (Zourdos et al., 2016).

What does RPE 8 mean in lifting?

RPE 8 means you finished the set with about two reps left in the tank. The last rep is slower than the first but still clean.

Is RPE 7 or RPE 8 better for strength?

Most strength work sits between RPE 7 and 9. RPE 7–8 is good for volume and technique; RPE 8–9 suits top sets and heavier work. Neither is better on its own; the program decides.

Is lifting RPE accurate for beginners?

Less so. In one study, novice squatters rated a true max lift at about 9 out of 10 on average, while experienced squatters were close to 10 (Helms et al., 2016). Beginners should log RPE for practice before relying on it to choose weights.

Should I use RPE or percentages?

Both work. In one eight-week study of trained men, RPE-based loading matched or slightly beat percentage-based loading for strength gains (Helms et al., 2018).