Does Pilates Help You Lose Weight? An Honest Answer from a Pilates Instructor

Sally Ong

Aug 22

4 min read

"Will pilates help me lose weight?" is probably the question I get asked most by people thinking about their first class. The honest answer is: yes, but not in the way you might expect, and understanding why will help you get much better results.

This post covers what pilates does and does not do for fat loss, why it is so effective for building a strong, flat core, and how to combine it with the rest of your life so the changes stick.

How many calories does pilates burn?

Let us start with the straight numbers. A beginner mat class burns roughly 170 to 250 calories an hour, and a more advanced or reformer session can reach 300 to 450, depending on your body weight and intensity. That is less than running and similar to a brisk walk. If you are judging pilates purely by calories burned in the session, it is a moderate exercise, not a high-burn one.

But calories burned during exercise is a surprisingly small part of the weight-loss picture. What matters more is what your body does the other 23 hours of the day, and that is where pilates quietly earns its reputation.

Why pilates changes your body shape

It builds lean muscle where it counts. Pilates targets the deep abdominals, glutes, inner thighs and back muscles that most cardio never touches. Muscle is metabolically active, so more of it raises the number of calories you burn at rest. It also changes your silhouette: a stronger core and glutes make you look leaner at the same weight.
It fixes the posture that makes you look heavier. A forward head, rounded shoulders and a tucked pelvis push the belly forward and compress the waist. When I correct a client's alignment, they frequently look like they have lost several kilos before their weight has changed at all. Standing tall is the fastest "weight loss" there is.
It makes other exercise possible. Many people cannot run, lift or do HIIT because their back, knees or shoulders complain. Pilates builds the stability that lets you do higher-intensity exercise without injury, which is where the bigger calorie burn comes from.
It lowers stress. The focused breathing in pilates calms the nervous system. Chronic stress raises cortisol, which drives fat storage around the midsection and makes you crave quick-energy food. Clients regularly tell me they sleep better and snack less once they have a regular practice.

Pilates for a stronger core: what actually happens

People often assume "core" means the six-pack muscle. In pilates, the core is the whole cylinder: the transversus abdominis wrapping around your waist like a corset, the pelvic floor underneath, the diaphragm on top, and the multifidus along the spine. Crunches work the outer layer. Pilates works the deep layer.

This matters for weight loss because the transversus abdominis is what actually pulls your waist in. You can have strong outer abs and still have a belly that pushes out if the deep layer is weak. It also matters for the rest of your life: a strong deep core protects your lower back, improves balance, and makes every other movement more efficient. It is the foundation I build every programme on, whether the goal is pain relief, scoliosis management or body shape.

What the research says

Studies on pilates and body composition are mixed but encouraging. A 2021 systematic review in the journal Medicine found that pilates produced meaningful reductions in body weight, BMI and body fat in overweight and obese adults, with the best results in programmes of eight weeks or longer at two to three sessions a week. Other studies show improvements in waist circumference and core endurance even when weight did not change much. The consistent theme: pilates alone is a modest fat-loss tool, but pilates combined with sensible eating and some daily movement is a very effective one.

How to actually lose weight with pilates

Here is what I tell clients who come to me with weight loss as a goal.

Commit to two sessions a week for at least eight weeks. One class a week maintains; two builds. Our class packages are priced to make this affordable.
Choose intensity wisely. Reformer sessions with spring resistance build more muscle than basic mat work. If you are serious about body composition, a private reformer session once a week alongside a group mat class is a strong combination.
Walk every day. In Singapore it is easy to go from air-conditioned home to MRT to office without ever really walking. Aim for 7,000 to 10,000 steps. This, plus pilates, is a better formula than either alone.
Eat for the body you are building. You do not need a diet, but you do need enough protein to build the muscle you are working for, and fewer of the sugary drinks and late suppers that undo it.
Measure the right things. Take photos and measure your waist rather than obsessing over the scale. Muscle is denser than fat, so it is common to drop a dress size while the number barely moves.

Is mat or reformer better for weight loss?

Reformer, slightly, because the springs add resistance and you can work harder with better support. But the best choice is the one you will do consistently. Many of my clients find that a weekly group mat class in Eunos is the habit that sticks, and add reformer when they want to push further.

Will I get bulky?

No. Pilates builds long, lean, functional muscle. It is the method dancers have used for a century precisely because it creates strength without bulk.

Ready to try it?

If you want a stronger core, a leaner shape and a body that moves well, pilates is one of the best long-term investments you can make. Your first group mat class at V-Align in Eunos is just $12 for new clients. Book your trial here and come see what a difference alignment makes.