The Trend of Large-Scale Reformer Classes: Is a Reformer Class with 10 Participants Safe?

In recent years, so-called Reformer clubs have been emerging worldwide (including in the Netherlands), where large groups — sometimes up to 12 participants — train simultaneously on a Reformer (or an imitation Reformer). These clubs pop up like mushrooms and often disappear just as quickly. As an experienced Pilates trainer and studio owner, this trend raises questions about the safety and effectiveness of such classes, especially when they resemble a fitness workout more than the original Pilates method.

Pilates: More Than Just Reformer Classes

Imagine going to a quality restaurant for the full dining experience — starter, main course, and dessert — only to find they only serve soup or salads. Unless it’s a dedicated soup or salad bar, you’d be surprised. The same goes for Pilates: this brilliant movement method isn’t just about Reformer classes; it’s a system of transformative exercises that work as a whole, with a clear progression and structure. Pilates is not a one-size-fits-all method but a system designed to support the diversity of bodies — from young to elderly, from super fit to very weak — in the best possible way.

The question is: can a trendy new concept based on a Pilates machine — purely because it’s popular — truly deliver what the original method offers? In this article, I share my thoughts on the concept of Reformer clubs. What are your thoughts on this?

Pilates is not a one-size-fits-all method but a system designed to support the diversity of bodies — from young to elderly, from super fit to very weak — in the best possible way.

– Marjolein van Sonsbeek

The Essentials of a Safe Reformer Class

Several key principles are crucial to keep a Reformer class safe and effective:

A Knowledgeable Pilates Trainer

A well-trained instructor is vital for an effective and safe workout. A trainer with a comprehensive Pilates education of at least 500 hours understands anatomy, biomechanics, and the principles of the Pilates method. Additionally, they must be able to adapt to the individual needs and physical issues of participants. This is essential for proper technique and guidance, especially when working with a complex machine like the Reformer.

A trainer should be highly experienced — in my case, with over 20 years of expertise — which enables me to lead with authority and ensure discipline in class. Without clear leadership, accidents can occur, as discipline and control are crucial for a safe class.

Control and Individual Attention

The Reformer requires detailed instructions and corrections. With more than three participants in a class, it becomes nearly impossible for a trainer to monitor everyone properly and provide necessary corrections. This significantly increases the risk of dangerous situations and injuries.

The Original Purpose of the Reformer

Joseph Pilates designed the Reformer as part of his original Pilates method, focusing on control, precision, and progressive training. His brilliant system consists of over 1,000 exercises that quickly transform the body, improve posture, and reduce pain.

Pilates even supports rehabilitation, helps those with chronic issues, and offers significant benefits for older adults. The Reformer was not designed for fast-paced, high-intensity fitness workouts or as a group fitness machine. When the Reformer is used in a setting resembling ‘uptempo fitness’ rather than controlled Pilates, this can lead to sloppy execution and an increased risk of injury.

Quality Over Quantity

Pilates is about movement quality, not speed or repetition count. In large, high-intensity group classes, this focus on quality is often lost, reducing effectiveness and increasing the risk of discomfort or injury. Meanwhile, a high-quality Pilates class on the Mat and with equipment like the Reformer, Cadillac, Tower, Chair, and Barrel feels addictively good.

The Misconception Surrounding the Reformer

Many Reformer clubs capitalize on the popularity of the Reformer and the growing demand for dynamic workouts. However, a classical Advanced Reformer session is a powerful workout like no other! The practitioner sweats, the heart pumps, and the muscles tremble. Sore muscles are guaranteed, and after just one session, you’ll feel the impact on your body.

The popularity of the original Reformer has led to its frequent use as a ‘trendy fitness machine,’ while the original Pilates principles are often abandoned. These classes are frequently expensive and offer studio owners a lucrative business model.

In many cases, classes are adapted to suit fitness enthusiasts, featuring faster movements, less controlled exercises, and an energetic atmosphere. While this may appeal to those seeking an intense workout, it strays far from the Pilates method and poses potential risks.

Some clubs also use lighter springs or wider platforms, making the device easier for fitness-focused sessions. Although this lowers the entry barrier, it entirely changes the essence of the Reformer and diminishes the effectiveness of classical Pilates exercises. Often, there’s a high turnover of participants, with trial class attendees frequently joining the group. This influx of inexperienced participants can frustrate loyal members who see little progress or higher-level development. Ultimately, these Reformer clubs tend to fade away within four years when the hype dies down.

Why Small-Scale Reformer Classes Are More Effective

In smaller groups, the instructor can better focus on:

• Correct alignment and posture.
• Control and precision in each movement.
• Gradual development of strength and flexibility without overstraining the body.
• Individual adjustments for participants with injuries or physical limitations.

Choosing small-scale classes ensures a better and safer experience, ultimately leading to a stronger, more flexible, and healthier body.

Look for a studio with well-trained, experienced instructors

A safe and effective Reformer class requires expertise, control, and precision. Group classes with more than three participants make it difficult to maintain these aspects, especially when the focus shifts from Pilates to fitness. Those seeking true Pilates on the Reformer should look for a studio with well-trained, experienced instructors where professionalism, quality, personal attention, and safety are top priorities.

One positive aspect of Reformer clubs’ popularity is that they can spark curiosity about authentic Pilates. Often, participants later search for a studio that can deliver truly transformative results.