Pilates is a low-impact exercise method that strengthens your body through controlled, precise movements with a heavy emphasis on your core. Originally called “Contrology,” it was created in the early 20th century by Joseph Pilates, a German-born fitness pioneer who designed the system around one central idea: every movement should be performed with complete mental focus and physical control. Today, Pilates is practiced on mats and specialized machines in studios, gyms, and living rooms worldwide.
Where Pilates Came From
Joseph Pilates was born in Germany in 1883 and spent his childhood battling asthma, rickets, and rheumatic fever. Rather than accept a fragile body, he threw himself into gymnastics, bodybuilding, martial arts, and yoga, drawing on his gymnast father and naturopath mother for inspiration. He eventually developed his own system, which he called Contrology, defining it as “the complete coordination of body, mind, and spirit, achieved through conscious control over every movement.”
Pilates refined his method while working with wounded soldiers during World War I, using it as a form of physical rehabilitation. He later argued that modern life was eroding physical fitness, and offered Contrology as the fix. His definition of fitness was holistic: a uniformly developed body and a sound mind, capable of performing daily tasks with what he called “spontaneous zest and pleasure.” After his death, his students carried the method forward, and the name shifted from Contrology to simply Pilates.
The Six Core Principles
Pilates is built on six foundational principles that distinguish it from other forms of exercise. These aren’t just philosophy. They shape how every movement is performed in class.
- Centering: Every exercise originates from your core, which Pilates called the “powerhouse.” This area between your ribs and hips drives all movement.
- Concentration: You’re expected to pay full attention to each movement, strengthening the connection between your mind and your muscles.
- Control: Movements are slow and deliberate. Proper form matters more than speed or intensity.
- Precision: One carefully executed repetition is worth more than ten sloppy ones.
- Breath: Pilates considered breathing the most important part of exercise. Each movement is paired with a specific breathing pattern.
- Flow: Exercises transition smoothly from one to the next, with continuous, graceful movement rather than stop-and-start repetitions.
What Pilates Does to Your Body
Pilates targets muscles that most workouts overlook. While it does work the visible abdominal muscles on the surface, its real strength lies in engaging the deep stabilizing muscles underneath, particularly the transverse abdominis (the deepest layer of your abdominal wall), the pelvic floor, the hips, and the small muscles along your spine. These are the muscles responsible for posture, balance, and protecting your joints during everyday movement.
The result is improved core strength, better posture, greater flexibility, and reduced joint pain. Because the movements are low-impact, Pilates builds endurance and muscle tone without the joint stress that comes with running or heavy weightlifting. A meta-analysis published in the Korea Society of Physical Therapy found that Pilates produced significant reductions in both pain and disability for people with chronic low back pain, with consistent results across both mat and equipment-based programs.
Mat Pilates vs. Reformer Pilates
The two most common formats are mat Pilates and reformer Pilates, and they feel quite different in practice.
Mat Pilates is performed on the floor using a padded mat (thicker than a standard yoga mat). Your body weight provides all the resistance. No equipment is required to get started, making it accessible and inexpensive. The trade-off is that there are fewer ways to modify exercises. If a movement is too difficult, your options for scaling it down are limited.
Reformer Pilates uses a sliding carriage machine with adjustable springs, straps, and foot bars. The springs add or reduce resistance, which means the same exercise can be made easier for someone recovering from an injury or harder for someone looking for a challenge. Reformer classes are typically found in dedicated Pilates studios and tend to cost more than mat classes. Beyond the reformer, studios may also have a Cadillac (a bed-like frame with bars and springs overhead, great for supported mobility work and decompression), a Wunda Chair (a compact piece of equipment that builds deep strength and balance, especially in standing positions), and other specialized apparatus.
Both formats produce meaningful results. If you’re brand new to Pilates, mat classes are a solid starting point for learning foundational movements. If you have an injury or limited mobility, the reformer’s adjustability can be a real advantage.
How Pilates Breathing Works
Pilates uses a specific breathing technique called lateral breathing that feels different from how you normally breathe. Instead of letting your belly expand on each inhale (the way most relaxation-focused breathing works), you keep your abdominal muscles pulled in and direct the breath into the sides and back of your rib cage. This lets your lungs fully expand while your core stays engaged and stable.
The technique works like this: inhale through your nose, feeling your rib cage widen to the sides. Then exhale forcefully through pursed lips, using your abs to push the air out and drawing your navel deeper toward your spine. The exhale is active and controlled, not passive. This breathing pattern serves a dual purpose: it stabilizes your core throughout every exercise while keeping oxygen flowing to your muscles.
If you’ve done yoga, you’ll notice the difference immediately. Yoga breathing typically encourages belly expansion for relaxation and nervous system regulation. Pilates breathing keeps the belly drawn in, prioritizing core stability and muscle control over a calming effect.
How Pilates Differs From Yoga
Pilates and yoga share some surface similarities (mat work, bodyweight movements, an emphasis on breath), but their goals and origins are quite different. Yoga originated in India over five thousand years ago and is rooted in spiritual practice, incorporating meditation, relaxation, breathwork, and specific dietary and philosophical principles. Pilates is a 20th-century exercise system designed primarily for physical rehabilitation and strength.
In practice, Pilates focuses on small, controlled movements that target deep stabilizing muscles, with spring-based equipment playing a central role in many programs. Yoga emphasizes holding poses, flowing between sequences, and improving flexibility and balance. Pilates tends to be better suited for building core strength and recovering from injuries. Yoga tends to offer more for flexibility, meditation, and stress reduction. Many people practice both.
What to Expect in Your First Class
A typical Pilates class runs 45 minutes to an hour. Wear fitted, comfortable clothing that lets you and your instructor see your body alignment. Loose, baggy shirts can get in the way when you’re lying on your back or moving through transitions. Grippy socks are common in studio settings, though some classes are done barefoot.
Don’t let the low-impact label fool you. You will feel your muscles burn during class, and soreness the next day is normal, especially in your abs, inner thighs, and glutes. A classic beginner exercise called the Hundred involves holding your legs off the ground while pumping your arms for 100 beats. The range of motion is tiny (less than two inches), but the sustained contraction is intense. Pilates builds strength through time under tension and precise muscle engagement rather than heavy loads or explosive movements.
If you’re taking a reformer class for the first time, your instructor will walk you through the machine before you start. Expect to spend a few minutes learning how the carriage slides, how the straps attach, and how the spring settings change resistance. Group reformer classes typically have six to twelve machines in a room, with the instructor demonstrating each exercise at the front.