June 22, 2026, 2:14 am | Read time: 6 minutes
Six-pack through Pilates? FITBOOK author and Pilates trainer Nina Ponath conducts a fact check. She explains the actual impact Pilates has on the core—and why belly fat can’t be reduced solely through targeted training.
Why Pilates Is Not a Miracle Cure for Belly Fat
The dream of a “washboard stomach” through Pilates is a perennial favorite on social media. Everywhere you see toned bodies on reformers promising a flat core and the coveted “Pilates body.” All you need—or so it seems—is a mat or a reformer, the necessary discipline, and some endurance. And suddenly, the dream figure seems within reach. Sounds too good to be true.
When you ask highly motivated participants in a Pilates class about their goals, one wish often tops the list: “I want a flatter stomach.” Pilates has the reputation of delivering just that. After all, the exercises are performed from the core—by activating the so-called “Power House.” And yes, I can promise you: After a few weeks of training, you’ll feel more defined, your posture will be more upright, and your abdominal muscles will be noticeably firmer. But—and this is the honest answer: Your stomach won’t become flat because of it.
Pilates and the False A-B Connection
Sometimes, we fall for an illusion with Pilates. At least that’s what sports scientist and personal trainer Andreas Heumann believes: “My observation is that Pilates attracts a certain type of woman who is usually already slim.” The flat stomach is often less the result of the training and more something that was already there.
What Pilates Really Does to Your Stomach
Pilates is a highly effective method for strengthening the deep muscles. We primarily train the transversus abdominis muscle—our deepest abdominal muscle, which is wrapped around the waist like a natural corset. When this muscle is strong, it pulls the abdominal wall flatter inward and simultaneously stabilizes the spine.
This means: Pilates actually changes your muscular structure. Through targeted training, your stomach becomes noticeably firmer and can appear “sucked in.” Those who regularly practice Pilates will not only feel slimmer but also literally appear a few centimeters taller because the posture is improved by the more stable core.
But: Pilates is not a fat-burning program in the traditional sense. When it comes to calorie consumption, the training method doesn’t fare particularly well. Or put another way: A 50-minute Pilates session is—calorically speaking—at least as effective as a walk. More than 80 to 180 calories are usually not burned, depending on body size, weight, and fitness level.
The Misunderstanding About the “Flat Stomach”
Even belly fat cannot be specifically burned through training. We must be scientifically honest here: “Where we store fat is always genetically predetermined,” says sports scientist Andreas Heumann. The expert advises prioritizing one’s health over a six-pack. “If you’re healthy, fit, and lively and genetically have some belly fat, you shouldn’t chase after a body ideal too much.”
Through targeted training, you can optimize the genetic framework, but you won’t achieve a completely different figure with any sport. Whether we tend to have fuller thighs, a rounder butt, or some belly fat is ultimately a question of genetics.
Moreover, there is no “local fat burning.” When you do abdominal exercises, you strengthen the muscles under the fat layer. However, if there is a fat layer over the muscles, the muscle will become stronger through training, but the fat tissue above it will remain where it is. A “flat stomach” is therefore always the result of two factors:
- The muscular component (Pilates): We build the muscular foundation that keeps the stomach flat and stable.
- The metabolic component (nutrition): The reduction of body fat primarily occurs through a negative energy balance. “Losing weight is always a mix of a reduced diet and exercise,” says Andreas Heumann. The latter can be partially covered by Pilates, but a sensible addition is cardio training, as many Pilates exercises are primarily held.
Why Pilates Can Still Create a Flatter Stomach Feeling
In plain terms, this means: Those who regularly practice Pilates strengthen their core and build stable abdominal muscles. However, if the rest of the lifestyle—especially the diet—doesn’t match, the stomach will become stronger but not automatically flat. Pilates creates the base, and nutrition provides the finish.
Nevertheless, the training has a decisive advantage for appearance: Many people carry their stomachs more forward due to poor posture, such as when the pelvis tilts into a hollow back. Pilates can correct the pelvic position and promote a more upright posture. This alone often makes the stomach appear flatter immediately. Additionally, the training gets the circulation going. Even though Pilates is not a classic HIIT workout, the conscious breathing and continuous muscle tension activate the metabolism.
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How Pilates Works Against Belly Stress
An often underestimated factor is cortisol. The stress hormone causes our body to preferentially store fat in the belly. Pilates acts as a natural anti-stress training through conscious breathing and high concentration. This is shown, for example, in a study1 that examined the effects of eight weeks of Pilates training in older women. The researchers observed changes in cortisol rhythm as well as improvements in anxiety, depression, and cognitive function.
Simply put: Less stress means fewer belly-fat-promoting hormones—and potentially a flatter stomach.
My Conclusion for Your Routine
If a flat stomach is your goal, you should consider Pilates as your stability anchor. The training shapes the contour, improves the silhouette, and ensures that you train healthily and effectively.
The “flat stomach” often seen on social media is almost always the result of a very conscious lifestyle. Pilates gives you the strength to control your core. However, the “fat around it” must be addressed through a nutrient-rich, balanced diet.
My advice: Stop sucking in your stomach in front of the mirror. Instead, start strengthening it from the inside out through training. If you combine Pilates with a diet that nourishes your body and regulates body fat percentage, you’ll see results that go far beyond a flat stomach. You’ll develop a completely new sense of strength and stability in your core. And that is ultimately far more valuable than any ideal image on Instagram.