Pilates Equipment Explained

The apparatus traces to one man. Joseph Pilates, born in Germany, developed a movement method he called Contrology and published Return to Life Through Contrology in 1945, per Wikipedia's history of Pilates. Much of the early equipment came out of his time interned on the Isle of Man during the First World War, where he began building spring-based apparatus to help rehabilitate fellow internees. He was a prolific inventor, filing more than 26 patent applications across his apparatus designs, according to the same source.

That origin explains the look of the gear. The springs do a particular job: they can either assist a weak movement or resist a strong one, depending on how you set them and which way you push. That single idea (graded spring resistance you can dial up or down) is what lets one machine carry a beginner through gentle range-of-motion work and an advanced practitioner through serious strength work.

The reformer is a bed-sized carriage that slides back and forth on rails, with springs at one end for resistance and a foot bar, shoulder rests, and straps as anchor points. You work lying, kneeling, sitting, or standing on the carriage, using the springs to load movements you'd otherwise do on a mat. It's the apparatus most Australian boutique studios specialise in, and it's covered in depth in our practical reformer Pilates guide.

What makes it the workhorse is its range. The same machine runs gentle assisted work and demanding strength sequences, because the spring load and your body position change the difficulty continuously. Slow, controlled movement is the norm rather than fast reps. That's why a reformer-only studio can build an entire timetable, from beginner foundations to advanced classes, on one type of equipment.

The Cadillac, also called the trapeze table, is a large bed-like apparatus with a tall frame built over it, fitted with springs, bars, straps, and loops at multiple heights. You can work lying on the bed, sitting, kneeling, standing, or even hanging from the overhead bars, which opens up angles and supported positions the reformer can't reach.

The name is a piece of studio folklore. According to accounts attributed to Romana Kryzanowska, one of Joseph Pilates' senior students, a client in the 1940s nicknamed the apparatus the Cadillac after the car, a comparison to its size and comfort (recounted in Pilates Anytime's history of Joseph Pilates). It's the largest and most versatile single piece in a classical studio, which is also why it takes up the most room and tends to be used for one-on-one or small-group work rather than big classes.

A tower is, in effect, the Cadillac's frame without the bed. It's a vertical structure, usually wall-mounted or attached to one end of a reformer, that adds spring attachments at different heights above the carriage. Pair a tower with a reformer and you get much of the Cadillac's overhead spring repertoire in a smaller footprint, which is why space-conscious studios often choose a reformer-plus-tower combination over a separate full Cadillac.

The trade-off is room and range. A standalone Cadillac gives you the full bed-and-frame repertoire and suits dedicated apparatus or clinical work. A reformer with a tower attachment saves floor space and equipment spend while covering a large share of the same exercises. Which one a studio installs comes down to its space, its budget, and whether it runs group classes or individual sessions.

The Wunda chair is the compact one. It's a small, box-shaped unit with a spring-loaded pedal (or split pedals) at the front, and you work on it seated, standing, lying, or pressing against the pedal from various positions. Despite the size, it's demanding: with less surface to support you than a reformer or Cadillac, it exposes balance and stability work that larger apparatus can let you hide.

Studios like it for two practical reasons. It takes up almost no space, and it adds a different kind of challenge to a program built mostly on the reformer. You'll see it used for strength, control, and balance work, often in the advanced end of a studio's repertoire.

Barrels are the curved apparatus, and there are two common ones. The ladder barrel pairs a rounded barrel with a small ladder of rungs and a gap between them you adjust to your leg length; it's used for spinal extension over the curve, side-bending, and stretching the backs of the legs and the hips. The spine corrector (sometimes called a step barrel or arc) is the smaller, saddle-shaped version that sits on the floor, used to support the back through extension and to work the core over the curve.

Neither has springs. They're shaped surfaces that let you move the spine through ranges that are awkward to support on a flat mat, which is why they round out a classical apparatus set even though they look the simplest. A studio that wants the full traditional repertoire keeps at least one barrel; a reformer-only studio often skips them.

The mix follows the model. A boutique reformer studio running group classes is built around a bank of reformers, sometimes with towers attached, and may carry little else. A classical or clinically oriented studio runs the full set: reformers, at least one Cadillac, a Wunda chair, and barrels, because the variety is the point and much of the work is one-on-one or small-group.

The Pilates Association Australia even sets a minimum apparatus list for studios seeking its voluntary registration: at least one each of a Cadillac, reformer, Wunda chair, and barrels, per the PAA studio registration page. So if you walk into a PAA-registered studio, that's the kit you can expect to find. A reformer-only studio that hasn't sought registration is a perfectly legitimate business; it's just built for a different kind of class. If you're choosing where to train, the equipment on offer is a fair signal of what the studio specialises in. You can compare what's near you on the Studio Finder Pilates listings or search by location.