What is a Pilates Reformer?

It looks like a bed, works like a gym, and feels like nothing else you’ve tried. Here’s everything you need to know.

If you’ve ever peered through the window of a Pilates studio and seen a row of long, low machines with sliding carriages, springs, and straps - that’s the Reformer. And yes, it looks a bit like a medieval prop from a period drama. But it is very much not a torture device.

Your core might respectfully disagree by the third exercise. But that’s a different conversation.

The Pilates Reformer is widely considered one of the most versatile and effective pieces of exercise equipment ever designed. It’s been in use for over a century, refined continuously, and adopted by physiotherapists, elite athletes, dancers, and rehabilitation specialists worldwide. There’s a reason it’s at the centre of every serious Pilates studio - it does something genuinely different from anything else.

This post explains exactly what the Reformer is, how it works, what it can do for your body, and what to expect when you first get on one.

The Origin Story

The Reformer was invented by Joseph Pilates during World War One - and the origin story is as practical as it is ingenious. Working with injured soldiers and internees on the Isle of Man, Joseph rigged bed springs to hospital bed frames to create a resistance system that allowed bedridden patients to exercise without getting up. The springs provided both assistance and resistance, enabling controlled movement even for people who couldn’t yet bear their full body weight.

By the time he opened his New York studio in 1926, he had developed the Reformer into a fully realised piece of apparatus. The name ‘Reformer’ was intentional: this was a machine designed to reform the body - to correct posture, rebuild strength, and restore functional movement.

A century of refinement later, the design principles are essentially unchanged. The sliding carriage, the spring resistance, the footbar and straps - all of it traces directly back to those original hospital beds. Which is rather a remarkable endorsement of the original concept.

What Does a Reformer Actually Look Like?

A standard Pilates Reformer is approximately 2.5 metres long and sits low to the ground - around 30cm high - on a raised frame. The main components are:

The carriage: A padded, flat platform that slides smoothly along rails within the frame. You lie, sit, stand, or kneel on the carriage depending on the exercise. The carriage moves toward and away from the footbar as you push or pull against the spring resistance.

The springs: A set of colour-coded springs that attach the carriage to the frame and create resistance. Different springs have different tensions, and they can be combined in various configurations to make exercises easier or harder. Lighter springs assist movement; heavier springs resist it. This spring system is what makes the Reformer uniquely adaptable.

The footbar: A padded horizontal bar at one end of the Reformer. You push against it with your feet during footwork and leg exercises, or use it as a support point for other positions.

The shoulder blocks: Padded blocks at the top of the carriage that prevent you from sliding off when pushing the footbar. They also provide positional reference for lying exercises.

The straps and pulleys: Long straps attached via pulleys at the top end of the Reformer. You hold these in your hands or place your feet in loops to perform arm and leg exercises in multiple positions and directions.

The headrest: An adjustable padded rest at the top of the carriage for head and neck support during supine exercises.

Optional extras: Many Reformers accommodate additional apparatus: a Jumpboard (for supine jumping), a Long Box and Short Box (for seated and prone work), a Standing Platform, and various other props that expand the exercise repertoire significantly.

Together, these components create a system that can support and challenge the body in lying, seated, kneeling, and standing positions - across an almost limitless range of exercises.

How Does the Spring Resistance System Work?

This is the part that makes the Reformer genuinely unlike anything at a conventional gym - and worth understanding, because it explains why the Reformer can be simultaneously easier and harder than bodyweight exercise, depending on the exercise and the spring setting.

In a conventional gym machine, resistance is unidirectional: you push or pull against a fixed weight, and that’s the challenge. The Reformer’s springs work differently. Because springs are elastic, they provide progressive resistance - the load increases as the spring stretches further. They also provide assistance at the start of a movement when the spring is compressed.

This has two important implications:

Springs can make exercises easier. In footwork on the Reformer, pushing out against light springs is easier than performing a squat against your full bodyweight, because the spring provides assistance as the carriage returns. This is why the Reformer is excellent for rehabilitation - you can load the body progressively, starting well below bodyweight.

Springs can make exercises harder. In arm and leg exercises using the straps, heavier spring resistance requires more effort to control - particularly in eccentric (lengthening) phases where the spring is pulling the limb back. This kind of eccentric loading is exceptionally effective for building functional strength.

Your instructor manages the spring configuration throughout class - adjusting which springs are in use and at what tension for each exercise. You don’t need to think about this, especially in your early sessions. Over time, you’ll develop an intuition for what different spring settings feel like and what they’re for.

What Does the Reformer Do for Your Body?

Builds deep, functional strength

Unlike gym machines that isolate individual muscles, the Reformer requires your whole body to work as a coordinated system. Every exercise involves the core as a stabiliser, even when the primary work is happening in the legs or arms. The result is strength that is integrated and transferable - the kind that makes everything else in your physical life easier.

The spring resistance also allows the Reformer to target the deep stabilising muscles that conventional training struggles to reach - the transverse abdominis, the multifidus, the hip rotators, the rotator cuff stabilisers. These are the muscles that protect your joints and maintain your posture under load. Training them changes how your body moves at a fundamental level.

Improves mobility and flexibility through active range of motion

The Reformer moves the body through ranges of motion that are difficult to access with bodyweight exercise or conventional equipment. The spring assistance allows you to work at full range without the risk of passive overstretching, because the muscles are actively engaged throughout. This is active mobility - strength through length - and it’s significantly more functional than passive stretching.

People who consider themselves inflexible often find the Reformer opens up range of motion they didn’t know was available, because the spring support removes the compensatory tension that bodyweight exercises can create.

Protects and rehabilitates joints

The Reformer’s low-impact nature makes it exceptional for people with joint sensitivities, post-surgical rehabilitation, or conditions that make high-impact exercise inappropriate. The spring assistance means you can load the body progressively, starting well below bodyweight and building gradually as strength develops.

This is the same mechanism Joseph Pilates used with injured soldiers over a century ago - and it remains one of the most effective rehabilitation tools available to physiotherapists today.

Builds core control from the inside out

Every Reformer exercise involves the core as either a primary mover or a stabiliser. The moving carriage creates an inherently unstable surface that demands constant core engagement to control - far more so than exercises performed on a static mat or bench. Over time, this builds the deep abdominal and spinal stability that underlies good posture, injury prevention, and functional strength in daily life.

“The core isn’t just your abs. It’s the whole system that holds your spine together under load. The Reformer trains all of it.”

Improves posture and body awareness

The feedback the Reformer provides - through the carriage, the springs, the footbar, and the straps - gives your nervous system a constant stream of information about how your body is positioned and moving. This proprioceptive richness accelerates the development of body awareness in a way that mat work alone cannot replicate. People who train regularly on the Reformer tend to develop noticeably better posture, movement quality, and spatial awareness relatively quickly.

Supports mental wellbeing

The concentration required during a Reformer session - managing breath, alignment, spring resistance, and movement simultaneously - leaves very little bandwidth for anxious or scattered thinking. The focused, rhythmic nature of Reformer work is deeply regulating for the nervous system. Most people walk out of a Reformer class feeling not just physically worked but mentally clearer and calmer than when they arrived. This is not a side effect. It’s part of the method.

Who Is the Reformer For?

The short answer: everyone. The longer answer:

Complete beginners: The spring assistance makes many exercises more accessible than their mat equivalents. Your instructor will introduce movements progressively, with lighter spring settings and clear guidance. You do not need to be fit, flexible, or experienced to start.

Injury rehabilitation: The Reformer’s progressive loading and low-impact nature make it one of the most valuable rehabilitation tools available. If you’re recovering from surgery, managing a chronic condition, or working around an injury, speak to your instructor before your first class so they can adapt accordingly.

Athletes and active people: The Reformer addresses the deep stabiliser work, rotational mobility, and joint integrity that conventional training misses. Runners, cyclists, golfers, swimmers, and gym-goers consistently find that Reformer Pilates improves performance and reduces injury rates in their primary sport.

Pregnancy and postnatal: With appropriate modifications, the Reformer is safe and beneficial during pregnancy and postnatal recovery. Speak to your instructor and ensure your GP is aware you’re exercising. Rise instructors are trained to adapt for pre and postnatal clients.

People wanting to move better as they age: The Reformer builds and maintains the muscle mass, joint mobility, bone-loading, and balance that become increasingly important across the decades. It’s one of the most effective long-term health investments available.

What Does a Reformer Class at Rise Look Like?

At Rise, Reformer classes are kept intentionally small so that every client gets proper individual attention. Your instructor will be in the room with you, watching what you’re doing, offering corrections, and adjusting the session to meet the needs of the people in it.

A typical Reformer class at Rise moves through:

• A warm-up in a lying or seated position, establishing breath, core connection, and body awareness

• Footwork - a foundational Reformer series working the legs and feet in various positions

• Core and abdominal work, often combining leg movement with breath and spinal position

• Upper body work using the straps, in lying or sitting

• Standing work, balance challenges, and functional movement patterns

• A cooldown stretch and integration

The pace is deliberate, the cueing is specific, and the exercises are varied enough that regulars rarely find sessions repetitive. Your instructor adjusts spring resistance between exercises - you’ll become familiar with this rhythm quickly.

Grip socks are required for all Rise classes. Wear comfortable, form-fitting clothing. Everything else is provided.

When Will You See Results?

This is the question everyone asks, and the honest answer is: sooner than you might expect.

Many clients report feeling stronger, taller, and more mobile after just a handful of sessions - not because dramatic physical changes have occurred, but because body awareness improves quickly and the neuromuscular connections being built change how movement feels almost immediately.

The physical changes - improved core strength and control, better posture, reduced back or joint pain, increased muscle tone - typically become more evident between sessions six and twelve with consistent practice. The classic Pilates wisdom holds: feel better in ten sessions, look better in twenty, have a new body in thirty. The experience of Rise members consistently aligns with this.

Consistency is the variable that matters most. Two to three sessions per week produces results significantly faster than once a week, simply because the neuromuscular learning accumulates more quickly. But once a week, done consistently over months, still produces meaningful and lasting change.

Ready to Try It?

The Reformer looks unfamiliar the first time you encounter it. Within a session or two, it starts to feel like the most logical piece of equipment you’ve ever used - because it’s designed to work with the body rather than around it.

Rise Pilates Studio is at 9 & 9a The Square in Keyworth, Nottinghamshire, with free parking on Bunny Lane. Our Reformer classes are suitable for all levels, and our instructors will guide you through everything from your first session.

Browse our timetable and book here. If you’d like to talk through which class is right for you before booking, just get in touch - we’re happy to help.

Once you’ve tried it, you’ll wonder how you ever moved without it.

FAQs

Is the Reformer suitable for beginners?

Yes. The Reformer is often actually easier to begin on than mat Pilates, because the spring assistance supports correct movement and the apparatus provides positional feedback. Your instructor will introduce exercises progressively and adjust resistance to your level throughout the session.

Is Reformer Pilates low-impact?

Yes. Reformer Pilates is low-impact - there is no jumping, running, or high-force loading on the joints. The spring resistance allows the body to be loaded progressively and in a controlled way. This makes it particularly appropriate for injury rehabilitation, joint sensitivities, and people for whom high-impact exercise is contraindicated.

How heavy are the springs?

Springs on a Reformer are colour-coded by tension, typically ranging from very light (one or two springs at low tension) to moderately heavy (multiple springs at full tension). Your instructor selects the appropriate spring configuration for each exercise - you don’t need to manage this yourself, especially in early sessions.

Can I do Reformer Pilates if I have back pain?

Reformer Pilates is one of the most commonly recommended exercises for back pain, and has a strong evidence base for reducing lower back pain and improving spinal function. However, specific conditions require specific approaches - please inform your instructor of any back issues before your first class, and speak to your GP or physiotherapist if you have an acute injury or diagnosed spinal condition.

How is Reformer Pilates different from mat Pilates?

Both follow the same Pilates principles, but the Reformer adds spring resistance, a wider exercise repertoire, and the ability to work in positions and ranges of motion that mat Pilates doesn’t easily access. The Reformer also provides more proprioceptive feedback, which accelerates body awareness. Many people do both - they complement each other well.

Where can I try Reformer Pilates near Keyworth?

Rise Pilates Studio is based in Keyworth village centre, with free parking on Bunny Lane. We’re easily accessible from West Bridgford, Ruddington, Radcliffe on Trent, and across the Rushcliffe area. Book here.