Reformer Pilates:
Why Absolutely Everyone
Is Doing It

So What Actually Is a Reformer?

If you haven't tried it yet, there's a good chance you've at least seen it — that long, sleek machine that looks like a cross between a bed frame and a piece of equipment borrowed from physiotherapy. The reformer was designed by Joseph Pilates himself, who developed his method while interning prisoners during World War I, attaching springs to hospital beds to help bedridden patients rehabilitate their bodies. What began as a recovery tool became the foundation of one of the most sophisticated movement systems in the world.

The machine consists of a flat sliding carriage on a frame, with a set of springs connecting it to one end. The springs provide variable resistance — and that resistance is at the heart of what makes reformer training different. You push and pull against the springs in a huge range of positions: lying, sitting, kneeling, standing. The carriage moves. Your body has to continuously stabilise, control, and coordinate. That instability is the point.

Unlike fixed-weight machines at the gym, where your body is supported and the movement is predetermined, the reformer demands that your deep stabilising muscles — particularly those around the spine, pelvis, and shoulders — are engaged throughout. It is a neurologically different kind of workout, not just a physically harder one.

The Numbers Behind the Boom

This is not a passing trend. The data is unambiguous about the scale and staying power of what's happening.

ClassPass, the world's largest fitness booking platform, reported a 66% increase in Pilates bookings in 2025 year-on-year — and named it the most-booked workout category globally for the third consecutive year. The global Pilates and yoga studios market was valued at $142.3 billion in 2025 and is projected to reach $430 billion by 2034, growing at a CAGR of over 10%. The reformer equipment market alone is projected to grow at 8.6% annually through 2032.

The momentum is cultural as well as commercial. When Aldi launched an affordable foldable reformer in the UK in May 2025 for £149.99, customers queued from dawn. Some stores had six units in stock. The reformer has completed its journey from niche rehabilitation tool to genuinely mainstream desire object.

What the Science Actually Says

Reformer Pilates has accumulated a genuinely strong body of clinical evidence — particularly for back pain, core function, and overall physical conditioning. It is one of the better-researched modalities in the low-impact fitness space.

Reformer vs Mat: Is There a Difference?

Yes — and it's worth understanding before you book your first class. Mat Pilates is performed on the floor using bodyweight and gravity as resistance. It is accessible, equipment-free, and a solid foundation for understanding the principles of the method. Many people start there and stay there happily for years.

The reformer adds spring resistance, which fundamentally changes what's possible. Springs can both assist and resist movement — meaning you can work with your body to access positions and ranges of motion that bodyweight alone wouldn't allow, and then progressively increase the challenge as you develop. The moving carriage means your body can never truly "cheat" the way it can on a static surface: stabilisation is constant and unavoidable.

Research suggests reformer Pilates offers greater trunk strength benefits in some populations, and measurably outperforms mat Pilates for certain athletic and neuromuscular outcomes. For rehabilitation, particularly spinal rehabilitation, the ability to modulate spring resistance makes the reformer a more precise clinical tool. That said — both methods share the same principles, and the best approach is the one you'll actually do consistently.

How to Actually Start

The reformer can look intimidating. The springs, the straps, the foot bar — arriving to your first class with no context can feel like being handed controls to something you don't fully understand. Here's what to know before you go.

1. 01
   Book a beginner or fundamentals class first

   Most studios offer introductory sessions specifically for first-timers. These are not a slower version of the regular class — they are genuinely different, covering the vocabulary of the machine (carriage, springs, foot bar, straps) and the foundational movements you'll build everything else on. Skipping this and jumping into a regular class cold is how people injure themselves.

2. 02
   Go smaller group or private if you can

   The boom in reformer popularity has led to very large group classes, sometimes with minimal individual instruction. If you're new, a smaller group (six or fewer) or private session gives you access to proper coaching on form and spring selection. The quality of your early sessions shapes your technique for a long time.

3. 03
   Expect to feel it in places you weren't expecting

   The deep stabilisers that reformer training targets are muscles that most people have been underusing for years. Don't be surprised if your inner thighs, the muscles along your spine, or your shoulder stabilisers are unexpectedly sore for a day or two after your first sessions. This is normal and generally resolves as your body adapts.

4. 04
   Commit to at least four to six sessions before judging it

   The first two sessions of reformer Pilates are largely about learning the machine. The third and fourth are where you start to move with it rather than against it. By session five or six, most people have their first real experience of what the method feels like when things click — and that's the session that turns people into regulars.

5. 05
   Two to three times per week is the sweet spot

   Research and practitioner consensus both point to two or three sessions per week as the frequency that produces meaningful change in posture, strength, and body awareness over a six to twelve week period. Once a week will maintain awareness but progress will be slower. Daily sessions without recovery time are unnecessary and counterproductive.