RPE, Intensity, & The Secret Sauce of CrossFit

There's a number next to every workout we post. You've probably noticed it.

RPE 9. RPE 7. RPE 6.

There's a lot of information inside every workout, but that number might be the most important thing on there — because while the programming tells you what to do, the RPE tells you how hard to do it. And understanding it changes the way you train.

The most misunderstood thing about CrossFit

CrossFit has a reputation: intense. Hard. Not for the faint of heart. That reputation isn't wrong, exactly (one of our three principles, after all, is "work hard") — but it's incomplete. The gap between what people think intensity means and what it actually means explains why some people burn out, why some programs feel random, and why some members plateau while others progress for decades.

What intensity actually means

CrossFit's founder Greg Glassman defined it precisely: intensity equals power output — force multiplied by distance, divided by time. In plain English: how much work you do, and how fast you do it. That's it.

This matters because intensity is measurable. It's not a vibe. If you do more rounds of a 15-minute AMRAP this week than you did last month, your intensity went up. Full stop. And intensity, defined this way, is the ingredient that drives almost every result you're after — better body composition, stronger cardiovascular system, improved health markers.

It also clarifies the difference between random and variable. A gym that throws random hard things at you every day is just chaos. A gym that varies movements, time domains, and intentionally modulates intensity across the week? That's the point. The RPE on every workout is evidence that the week is designed, not improvised.

So why doesn't every workout go to 100%?

Going all-out every single time works for about six weeks. Then it stops working. Performance drops, injuries show up, dread replaces motivation.

As coach Chris Spealler put it: "Intensity is being comfortable with being uncomfortable." The key word is comfortable. Not destroyed. Not wrecked. Pushed — but in a way you can sustain.

The smarter approach: most workouts should sit around 70–85% intensity. An occasional true max effort — maybe two or three times a month. Some days, deliberately easier. The dose makes the poison.

What RPE actually means

RPE stands for Rate of Perceived Exertion. It's a 1–10 scale that describes how hard a given effort should feel — the coach telling you not just what to do, but the gear you should be in.

• RPE 6: Moderately challenging. You could hold a conversation. Breathing elevated, not labored.
• RPE 7: Comfortably hard. Moving with purpose, but the pace is sustainable.
• RPE 8: Hard. Pushing, managing fatigue, but staying in control.
• RPE 9: Very hard. Near-maximal effort. You're at your edge — and you know it.
• RPE 10: Everything you have. True max effort. Rare.

The RPE tells you how hard this specific workout should feel relative to your current capacity. A 6 for an elite athlete looks different than a 6 for someone in their first year. And just as every movement can be modified to meet you where you are, the intensity of every workout can be adjusted to match the RPE target.

What it looks like in real life

Look at a recent week of workouts here at Harpoon through the RPE lens: two days at RPE 9, two at RPE 7, two at RPE 6, one at RPE 8. That's not random — it's a deliberate wave. High intensity when the programming calls for it. Moderate and lower intensity when recovery and sustainability are the point. The week as a whole produces more adaptation than a week of all-out efforts would, because it allows your body to actually absorb the work.

That's what "constantly varied" means in practice. The variation isn't just in the movements — it's in the intensity.

Where the 3-1-1 fits in

For those doing the full Active Human Protocol — 3 days at Harpoon, 1 home workout, 1 outdoor activity — the RPE framework extends beyond the gym walls. It's genuinely hard to hit high intensity on your own, whether that's a garage workout or a hike up Mount Agamenticus. The accountability, the coach, the clock, the person next to you — all of it is gone. Most people naturally settle into a lower gear.

That's not a failure. That's the design. Your home workout and outdoor activity naturally land in the RPE 5–7 range — recovery-compatible training that makes the hard days at the gym possible. And honestly? Those days are the whole point. We're not here to build people whose lives revolve around the gym. The gym exists to support the life outside it. Active people are happy people. The gym is the infrastructure that keeps you active.

Parting thought

Intensity matters — it's the ingredient that drives the results you're here for. But intensity only delivers when it's dosed correctly. RPE is how we communicate that to you. It's not a vibe check — it's a prescription. When a workout says RPE 7, we mean it. When it says 9, we mean that too.

Pay attention to the number on the board. It's telling you something.