You’ve probably heard the term RX in CrossFit classes, but what does it actually mean?
The term RX comes from medicine, where it means “prescription.” In the CrossFit world, it’s used in the same way — the workout as “prescribed.” It describes the intended stimulus of the workout: how heavy the weights should feel, how fast you should be moving, how out of breath you should get, and roughly how long the workout should take.
When a workout is written on the whiteboard, it comes with prescribed movements, weights, and rep schemes. That’s the RX version. It represents the intended challenge level — but here’s the important part: it’s written for a very small percentage of athletes. For most people, RX will feel extremely challenging, and that’s by design. Reaching the point where you can complete a workout RX is a milestone and should feel like a huge win. It’s something to celebrate, and for many members it becomes a powerful training goal.
What About Scaling?
You’ll also hear the word scaling a lot in classes. Scaling simply means adjusting the workout to suit your current ability while still hitting the same intended stimulus. That might mean lowering the weight, adjusting the reps, or swapping in a different movement if you’re still learning a skill.
Here’s the reality: 90% (or more) of athletes scale workouts in some way. Even experienced athletes do. Maybe the barbell feels fine, but the gymnastics element is out of reach. Maybe you can move the dumbbell weight, but not at the pace required to finish in the target time frame. Scaling is not “less than.” In fact, it’s the tool that ensures everyone gets the right workout for them on any given day.
If every single person in the room was doing RX, it would mean the workout was written too easy. And that would take away one of the best parts of CrossFit: there’s always something to learn, always something to improve, and always another level to reach.
Why RX Matters for Progress
There’s another important reason to pay attention to RX: it helps highlight your weaknesses.
If you always go too light and hold back on intensity, your progress will eventually stall. You might feel comfortable in the moment, but over time this slows down your fitness gains. RX workouts provide a useful reference point. They show you where the gaps are and where you should be spending extra time.
For some, the gap might be mobility that needs attention. For others, it could be strength, gymnastics skills, conditioning, or Olympic lifting technique. Good programming is designed to expose weaknesses, and that’s a positive thing. It gives you direction and focus for extra work — whether that’s in open gym, skill sessions, or PT with your coach.
In other words, RX isn’t just about going heavier. It’s about having a benchmark that helps you move forward faster.
The Trap of RX+
Sometimes you’ll hear about people going “RX+.” This means making the workout harder than prescribed — heavier barbells, higher-level gymnastics, extra reps. For the vast majority of people, this isn’t necessary. In fact, it often works against you.
Here’s why: when you go heavier than RX, your movement usually slows down. The slower you move, the less intensity you bring to the workout. And intensity is where results live. That’s what drives strength, fitness, and body composition changes. CrossFit is not about grinding through with the heaviest possible weights; it’s about moving well, moving fast, and moving with purpose.
👉 So, the next time you see RX written on the board, think of it as a long-term target — not a daily requirement. Celebrate the small wins, use scaling to your advantage, and trust the process. Whether scaled or RX, what matters most is that you’re putting in the work, getting fitter, and constantly learning.
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