RPE explained: how to log effort, not just weight

RPE stands for rate of perceived exertion. It is a number from 1 to 10 for how hard a set felt and how close you came to failure. Log it next to weight and reps and you learn something the weight alone cannot tell you: whether 5 reps at 100 kg was a comfortable working set or a grinder you nearly missed.

This guide explains the RPE scale, how it links to reps in reserve, why effort belongs in your log, and how to use it on good days and bad ones.

What is RPE in weight training?

RPE measures how hard a set felt to you. Lifters use a scale from 1 to 10, where 10 is an all-out set with nothing left and lower numbers mean more left in the tank.

2 lifters can both squat 140 kg for 3 reps. One stops with 3 clean reps to spare. The other barely stands up with the third. The weight is the same. The effort is not. RPE puts that difference into one number.

How does RPE relate to reps in reserve (RIR)?

Reps in reserve, or RIR, is how many more reps you could have done before failure. RPE and RIR describe the same thing from opposite ends: the higher the RPE, the fewer reps in reserve.

RPE 10 means 0 reps left. RPE 9 means about one rep left. RPE 8 means about 2 left, and so on. Many lifters find RIR easier at first, because "how many more could I have done?" is more concrete than rating effort.

RPE to RIR table

Use this table as a starting point. The last column describes how each level tends to feel during a working set.

Half steps like 9.5 are common near the top of the scale, where small differences in effort matter most.

Why log effort and not just weight?

Weight and reps tell you what you lifted. RPE tells you what it cost. Log both, and weeks later you can still read what each session meant:

• Same numbers, different sessions. 3 sets of 5 at 85 kg can be RPE 7 one week and RPE 9 the next. Without RPE, those sessions look identical, though your body felt them very differently.
• Progress you would otherwise miss. If the weight stays the same but drifts from RPE 9 to RPE 7 over a month, you are getting stronger before the bar goes up.
• Earlier warning of fatigue. When familiar weights feel harder across several sessions, rising RPE tells you recovery is slipping. You can act before you stall or tweak something.
• Better exercise comparisons. A note on how a set felt, next to its RPE, shows which exercises suit you and which ones nag.

For more on how effort fits into long-term strength gains, see our progressive overload guide.

How do you use RPE to adjust training on the day?

Coaches call this autoregulation: adjusting training to how you feel that day instead of forcing a fixed number. RPE makes it practical, because it gives you a target effort instead of a fixed weight.

Here is how it works. Your plan sets a target, for example 4 reps at RPE 8. You pick a weight you expect to hit that effort. If the set feels easier than planned, add weight on the next set. If it feels harder, hold or drop the weight. The reps stay about on target while the weight moves with how ready you are.

Push on good days

When sleep, food and stress all line up, a weight that is usually RPE 9 might feel like RPE 7. That is your signal to add weight. You use the extra strength you have that day instead of leaving it because the plan said otherwise.

Back off on bad days

On a rough day, the same weight might hit RPE 10 on the first set. Forcing the planned weight invites sloppy form and slows recovery. Take a little weight off to stay near your target RPE. The work still counts, and the rest of your week is protected.

This flexibility helps most in strength training. If strength is your goal, our notes on a workout tracker for powerlifting show how effort targets fit heavy, low-rep work.

What are common RPE mistakes?

Rating RPE accurately takes practice. These mistakes trip up most lifters early on:

• Underrating hard sets. You call a true RPE 9 a 7 because you do not know how many reps you had left. Your log then says you can add weight when you cannot.
• Overrating ordinary sets. You rate normal sets as 9s and 10s because the last reps were a grind. If everything is maxed out, the scale means nothing.
• Ignoring context. Caffeine, time of day and the exercise all change how a set feels. Your first heavy set feels different from your fourth.
• Rating before the set ends. Effort is clearest in the last reps. Wait until you rack the weight before you pick a number.
• Chasing a number. RPE guides the weight. It is not a score to beat. Forcing a 10 every session is a fast route to burnout.

You get better with practice. Rate each set honestly and write it down. When you do go close to failure, check your guess against how many reps you really had left.

How Trackist records effort

In Trackist you log RPE for each set, from 1 to 10, next to weight and reps. Each exercise also has room for a note of your own while the set is fresh.

Trackist uses that RPE when you fall short: hit the top of your rep range on every set and the suggestion goes up a step, but miss reps with an RPE 10 and it keeps the weight instead of cutting it. When you finish the session, the day summary shows your average RPE next to the session's volume, so a session that cost more than usual stands out. Your RPE data stays in your account, separate from anyone else's.

If you want a plan to try RPE targets on, browse our workout plans, including a push pull legs split.

Putting it together

RPE turns a list of numbers into a log you can read. The scale from 1 to 10 maps straight onto reps in reserve, so you know how close each set came to failure. Log it every time, and it shows progress before the bar goes up, warns you about fatigue before you stall, and tells you when to push and when to back off.

Start small. Pick one main lift, rate every working set honestly and write it down. In a few weeks your log will tell you what you lifted and how to lift better next time. For more training guides, visit the Trackist blog.