What Is RPE and How Do I Actually Use It?

If you’ve ever finished a set and had no idea if you should’ve gone heavier or stopped earlier… you’re not alone.

That’s where RPE comes in.

You don’t need a percentage chart or fancy calculator to guide your training. You just need to understand effort and how to measure it in real time.

RPE gives you a simple way to gauge how hard a set feels, so you can train with the right intensity on any given day.

What Is RPE? (Plain English Version)

RPE stands for Rate of Perceived Exertion. It’s a 1–10 scale that tells you how hard a set felt based on effort, not weight.

Here’s the quick breakdown:

10 – Max effort. No reps left. You couldn’t have done another one.
9 – One rep left in the tank
8 – Two reps left
7 – Three or more reps left
6 and below – You’re just moving weight. Very little effort.

You’ll often see it paired with RIR (Reps In Reserve). The two systems are basically the same, just framed differently.

The key thing to remember: RPE is subjective, but it gets more accurate the more you use it. It teaches you to listen to your body, not just follow numbers on a spreadsheet.

Why Use RPE Instead of Just Percentages?

Percentages are a great starting point, but they don’t adjust for real life.

Let’s say your program calls for 85% of your 1-rep max on squats. That number doesn’t know if:

You slept 4 hours last night
You skipped breakfast
Your hamstrings are smoked from practice
You’re just having a low-energy day

On a day like that, 85% might feel like a 10.
Other days, it might feel like a 7.

That’s where RPE shines.

It auto-regulates. Meaning, it adjusts based on how you’re performing right now, not how strong you were weeks ago when you tested your max.

That helps athletes stay within the right intensity range:

Avoids overtraining on bad days
Encourages pushing harder when you’re feeling great
Keeps the work honest and productive

How I Teach Athletes to Use RPE

Most athletes aren’t good at judging effort right away and that’s fine. It’s a skill.

Here’s how I teach it:

1. Pair RPE with Reps in Reserve (RIR) at First

Ask: “How many more reps could you have done?”
That keeps it simple and helps them connect the numbers to real effort.

2. Use It on Big Compound Lifts First

Squats, deadlifts, presses: Where effort is easier to feel and track.
Not as useful on curls or accessory work.

3. Track It in the Training Log

Write down the weight used and the RPE next to it.
Helps athletes build awareness of what different loads feel like.

4. Watch the Video Together

If you’re coaching in person or reviewing film, compare what it looked like to what they said it felt like.
Ask: “Would you really have had two more clean reps?”
Helps athletes learn to self-regulate with accuracy

Common RPE Mistakes and How to Fix Them

RPE is only useful if it’s used honestly. Here are the mistakes I see most often:

1. Treating Every Set Like It’s a 10

Some athletes just go full throttle every time.
If you always say “that was a 10,” you’re missing the point of RPE.
The goal isn’t to max out every set; it’s to control effort based on what the session is designed to accomplish.

2. Lowballing to Avoid Work

Some athletes overrate sets to avoid pushing harder.
If a set moved fast and looked easy, but they call it an RPE 9, that’s not honest feedback – that’s sandbagging.
It’s a way to dodge effort while still looking like they’re following the program.
Inflating RPE kills progression because it keeps intensity artificially low.

3. Confusing Fatigue with Difficulty

Fatigue makes everything feel harder, but that doesn’t mean you’re hitting a true RPE 9 or 10.
That’s why bar speed, rest time, and technique matter when judging effort.

How to Fix These Issues

Use video – Seeing a rep helps reinforce what effort actually looked like
Ask follow-up questions – “Could you have done another clean rep?” forces clarity
Track consistently – The more you record, the more you’ll refine your judgment
Use RPE as a conversation tool – Not just a number, but a way to reflect on training quality

Over time, athletes get more accurate and better at adjusting loads with confidence.

Final Thoughts

RPE is a strategic tool that helps athletes train smarter and progress consistently.

Used well, it builds self-awareness, better effort management, and long-term gains.

But it takes practice.

If you’re a coach, teach it.
If you’re an athlete, commit to learning it.
And if you’re serious about progress, stop guessing and start training with purpose.