The Gratz
Apparatus.
The equipment Joseph Pilates designed himself — built to his exact specifications. The only full classical Gratz studio in Boston.
Boston’s only full classical Gratz studio
Reformer · Cadillac · Wunda Chair
Spine Corrector · Ladder Barrel
Why it matters
The equipment
is the
method.
Joseph Pilates did not invent exercises. He invented a complete system — and he built the apparatus to deliver it. Every spring tension, every angle, every dimension of the Gratz equipment was designed with specific biomechanical intention. The equipment is not a prop. It is the method made physical.
Gratz Industries is the company Joseph Pilates commissioned to build his apparatus, and the only manufacturer that has produced authentic classical Pilates equipment continuously since his lifetime. When you train on Gratz equipment, you are training on apparatus that meets the specifications Joseph Pilates set — not a contemporary approximation of them.
“The apparatus is not there to make the work easier. It is there to make the work possible — in ways the body cannot achieve alone.”
Most studios that call themselves Pilates studios use commercial equipment designed for group classes, manufactured to a price point, and built without reference to the classical specifications. The springs are different. The angles are different. The exercises that work on authentic Gratz equipment cannot be fully replicated on anything else.
Endurance Pilates & Yoga is home to a complete classical Gratz apparatus — every piece of equipment in the classical system, maintained to the standard the method demands. This is not a point of pride. It is a prerequisite.
The complete classical apparatus
Six pieces.
One complete system.
Reformer
Photo of Gratz Reformer here
The Reformer
The centerpiece of the classical system — a moving carriage on a spring-loaded frame that provides both resistance and support simultaneously. The Reformer trains the body in three dimensions, demanding and developing real functional strength, coordination, and control that mat work alone cannot achieve.
The Reformer accommodates over 100 classical exercises — from the most foundational work to the most demanding advanced repertoire. A beginner’s first session and an advanced practitioner’s daily practice both happen here.
The foundation of classical training
Cadillac
Photo of Gratz Cadillac here
The Cadillac
Joseph Pilates’ most versatile apparatus — a raised mat table surrounded by a canopy of springs, push-through bars, roll-down bars, and leg springs. The Cadillac enables the most nuanced and therapeutic work in the classical system, including work that cannot be done anywhere else.
Essential for post-surgical recovery, complex body work, and the most advanced classical exercises. The Cadillac is where the method’s rehabilitation power is most clearly demonstrated.
Therapeutic · Advanced · Irreplaceable
Wunda Chair
Photo of Gratz Wunda Chair here
The Wunda Chair
Deceptively simple in appearance, the Wunda Chair is among the most demanding apparatus in the classical system. A box with a spring-loaded pedal, it trains balance, stability, and functional strength in an upright, load-bearing position — requiring the body to work in ways that reformer and mat work cannot replicate.
Particularly effective for athletes building functional lower body power, and for clients developing the deep stability that translates directly into performance and injury prevention.
Demands the most of the body
Spine Corrector
Photo of Gratz Spine Corrector here
The Spine Corrector
An arc-shaped apparatus designed to open, articulate, and strengthen the spine with intelligent support. The Spine Corrector addresses the deep postural patterns that years of sitting, injury, and compensation have created — creating genuine spinal mobility and resilience that persists long after the session ends.
Named by Joseph Pilates with characteristic directness — it corrects what modern life does to the spine. Often a client’s first experience of what their back can actually do.
Spinal health · Posture · Mobility
Ladder Barrel
Photo of Gratz Ladder Barrel here
The Ladder Barrel
A barrel-shaped apparatus with a ladder for handhold support, used for some of the most demanding stretching and strengthening work in the classical system. The Ladder Barrel develops extreme flexibility and control simultaneously — requiring the body to work at the edge of its range with precision and strength.
A benchmark of advanced classical practice. Work on the Ladder Barrel that would have been impossible in early sessions becomes achievable — and then challenging in new ways — as the practice deepens.
Advanced classical repertoire
The original practice
And the
mat.
Before there was any apparatus, there was the mat. Joseph Pilates published 34 mat exercises in Return to Life Through Contrology in 1945 — the original, complete expression of his method requiring nothing but a body and the ground beneath it.
Mat work is often misunderstood as the beginner version of Pilates. It is not. The classical mat repertoire, practiced in full and in sequence, is among the most demanding things a body can do. The apparatus makes certain exercises possible. The mat requires the body to do everything on its own.
At Endurance, mat work is taught as classical Pilates — not as floor exercises with a Pilates name. The 34 exercises, in sequence, with the standards the method demands.
Why Gratz specifically
Not all equipment
is equal.
Spring Tension
Gratz springs are calibrated to the specifications Joseph Pilates established — different in tension, feel, and resistance profile from commercial springs. The feedback they provide is what the classical exercises were designed around. On other equipment, the exercises change.
Dimensions & Geometry
Every measurement of Gratz apparatus — the height of the footbar, the length of the carriage, the angle of the push-through bar — was set by Joseph Pilates for biomechanical reasons. These dimensions create the conditions the classical exercises require. Approximations produce approximations.
Continuity of Craft
Gratz Industries has built classical Pilates apparatus continuously since Joseph Pilates’ lifetime. The craft knowledge embedded in each piece of equipment is not replicated by modern manufacturers — regardless of how closely they try to copy the design. There is a reason serious classical instructors seek it out.
