Types of reformer Pilates classes: cardio, failure and load

Ten years ago "reformer class" meant roughly one thing. It doesn't now. Walk into three studios in London this month and you can get three genuinely different workouts on what looks like the same machine — and the marketing won't tell you which is which, because all three will say strong, all three will say low impact, and most will say Pilates.

So here is the honest map. There are three jobs a reformer class can be built around. Knowing which one you're booking is the difference between training for a year and getting what you wanted, or training for a year and wondering why nothing moved.

One: built around output

The first kind pairs the carriage with something cardio — a rower, a bike — and builds the class around how much work you get through. Total output, heart rate, sweat. The springs are there to make the effort harder, and the resistance is fuel for the pace.

You'll know it because there's a second machine in the room and the class is organised around the clock.

What it's for: getting fit, sweating, variety. It does that well.

Two: built around failure

The second kind is slower — often much slower than ours — and it's built around taking a muscle to the point where it stops working. Sustained tension, no rest at the bottom, hold until it shakes and then hold a bit longer. The shake is the product. Muscle failure is the stated destination.

This is the one people get wrong. If you assumed the alternative to us was the fast, sweaty class, you'd miss that some of the busiest studios in London are slow and heavy too. Slow is not the difference. Slow is just a tool, and both of us use it.

What it's for: muscular endurance and a specific kind of hard. Also genuinely effective — it's just aiming somewhere else.

Three: built around load

That's us — load-based Strength Pilates, on the Powerformer™. The class is organised around how much load you can control, and around that number going up over time.

Failure is an endpoint. Load is a variable. You can reach failure on a light spring — most failure-based formats do, because you don't need much resistance to exhaust a muscle if you never let it rest. Reaching failure tells you where you ran out. It doesn't tell you that you got stronger.

Strength adaptation comes from working close to a load you can control, and then increasing it. If the spring setting never changes but you shake harder each month, you've got better at enduring. That's a real result. It just isn't strength, and if strength is what you came for, it's worth knowing the difference.

So we point everything at the load. Heavier springs as your control allows. A tempo slow enough that you own the movement rather than survive it. And a class structure — Foundation, Elevate, Power — that exists specifically so there's somewhere for the load to go.

Why control is the qualifier

Here's where the original method earns its place, and it isn't nostalgia.

Joseph Pilates didn't call this Pilates. He called it Contrology. The apparatus was built to expose whether you are controlling the movement or the movement is controlling you — and springs do that better than almost anything, because they pull back. Anyone can push a loaded carriage away. The question is the return. Do you control the carriage back to the stopper, or does it drag you back?

That returning phase is the whole test, and it's what lets us keep adding load safely. Control isn't the opposite of heavy. Control is the thing that earns heavy.

The other half is the centre — what classical Pilates calls the powerhouse. Deep abdominals, lower back, hips, glutes. Not a muscle group trained on its own, but the structure every other load is meant to travel through. Get that organising properly and the load can climb a long way. Skip it and you plateau, then you get sore.

How to tell which one you're in

Three questions, and you can answer all of them in one class:

Is there a second machine? A rower or bike in the room means the class is built around output.

What ends a set — the instructor, or your muscle? If the target is the shake, that's a failure format.

Has your spring setting changed since you started? If it hasn't, whatever else you're getting, you're not being loaded progressively.

That third one is the sharpest test, and it's worth asking of us too. If you've been coming for six months and nothing about the load has moved, something has gone wrong and you should say so to your instructor.

So which should you do?

Whichever matches what you actually want, and there's no wrong answer here. Want a sweat, a cardio hit and variety? The output-led classes are built for that and you should enjoy them. Want to find out exactly where your limit is? The failure formats do that better than we do, deliberately.

Want the number on the spring to go up, and to be able to point at what you can do now that you couldn't in March? That's ours. They also aren't mutually exclusive — plenty of our regulars run, lift or take a cardio class elsewhere and come to us for the strength work.

Where to start

Book Foundation first: it's for all levels, it's paced for technique, and it's where you meet the Powerformer and find out what a controlled return feels like.

Stronger when you leave. Better when you come back.