“When Will I Be Able to Do RX?” (Here’s the Real Answer)

Justin Potter
May 28
2 min read

If you’re used to scaling workouts, chances are you’ve asked (or thought):

“When will I be ready to do this Rx?”

It’s a good question. A normal question. A common question.

But here’s the truth: RX isn’t a badge of honor — it’s a tool. And just like any tool, it’s only useful when used the right way.

At Percheron, we really care less about “RX” and more about “RXL” —

Right. eXecution. Long-term.

That means moving well, at the right intensity, in a way that builds your capacity without burning you out. It’s not about ego — it’s about training smart today so you can keep showing up tomorrow.

But nonetheless... the question still gets asked on a daily basis. So, let’s break down what really determines your readiness — and how to know when you’re truly prepared to take on the prescribed version of a workout.

1. Rx Is About Capacity, Not Ego

RX doesn’t mean “hardcore.” It means your body and mind can handle the full version of a workout at the intended pace and under fatigue — with good movement.

Ask yourself:

Can I do the movements well, without compromising form?
Can I keep the intended intensity or time domain?
Can I finish within the time cap without major breakdowns?

2. Consistency Comes Before Rx

If you’re still inconsistent with your movement, pacing, or mindset, RX will expose it.

Instead, build:

Consistent mechanics
Solid engine and pacing awareness
Mental toughness over comfort chasing

You don’t graduate to RX — you grow into it.

3. Rx Readiness Looks Like This:

You’ve hit the scaled version of the workout multiple times with the right stimulus.
You’re moving efficiently and safely under fatigue.
You’re not just doing the movement — you’re doing it well, for reps, under pressure.
Coaches start giving you "the nudge". (Trust us—we see when you're ready before you do.)

4. When In Doubt, Ask Your Coach

The best athletes are coachable. Rx is earned, and your coach can help you navigate when you’re ready — and when you’re close.

5. Rx Isn’t the Goal — Progress Is

At Percheron, we’d rather see you scale with purpose and move like an athlete than suffer through Rx and miss the stimulus.

Rx is a milestone, not a finish line.

Final Thoughts:

Chase improvement, not a label.

Rx requires a growth mindset. You'll never get there without it. So, although there is a physical capacity component in play here... Rx is really more of a MENTAL concept, not just a physical one.

Physically speaking, though, when your mechanics, consistency, and intensity all align — you won’t need to ask if you’re ready.

In all my years of working with teenagers, I have leaned on one statement as a tool to help guide them to a wise decision: