RIR and RPE.
RIR counts the reps you still had. RPE scores the effort.
RIR is the clean reps you still had when you finished the set. RPE is a score from 1 to 10 of how hard it felt. On hard sets many people use RPE ≈ 10 − RIR: an RPE 8 and an RIR 2 usually describe the same set. Pick one scale. Do not log both.
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What is the difference between RIR and RPE?
RIR is a count. When you rack, you ask how many clean reps you still had. RPE is a score. You give the effort a number from 1 to 10.
Example: bench press, 60 kg, 8 reps. You had two clean reps left. That is RIR 2. Many people write RPE 8 for that same set.
Both answers talk about the same set. The unit changes: leftover reps, or an effort score.
How do you convert from one to the other?
On hard sets, many people usually use RPE ≈ 10 − RIR. It is the usual chart, not a law. Feel and last-rep grind can desync the count and the score.
- RIR 0 is RPE 10
- RIR 1 is RPE 9
- RIR 2 is RPE 8
- RIR 3 is RPE 7
An RPE 8 and an RIR 2 usually describe the same set.
Can I use both at once?
They map. You do not log both. If you think in RIR on Monday and RPE on Tuesday, the log mixes units. Pick one scale and stay with it for a few weeks.
Today Peak Health logs effort on every set as RPE. If you count RIR, you write the matching score.
Which one do I write down?
If the plan talks about reps in reserve, think how many you had left and write the matching RPE. If it talks about a score from 1 to 10, log RPE. If the plan says nothing, RIR is easier to learn: how many you had left. "I had two left" is how you count, not the plan's target.
What each scale is lives on what RIR is and what RPE is. How to log it on every set, on RPE and RIR.