Can Pilates build muscle?
Yes, and research backs it. Here's where most people plateau, and how adding real load changes the results.
If you've ever finished a Reformer class with shaking legs, you already know Pilates works your muscles. The real question most people are asking is different: will Pilates change the shape of my body, make me visibly stronger, and keep doing that over months, not weeks?
What the research says
A systematic review of eleven randomized controlled trials compared Pilates with other types of exercise. It found no significant difference in strength gains between Pilates and the other programs, whether strength was measured dynamically, isometrically or against resistance. The authors rated the evidence as low quality, so treat it as a promising signal rather than the last word.
In other words: Pilates is real strength training. It isn't "just stretching."
Why most people plateau
Muscles grow when they're asked to do a little more than they're used to. The American College of Sports Medicine's 2026 resistance training guidelines point to around ten or more sets per muscle group each week to build muscle, and training at least twice a week to build strength.
- Same workout, same springs. After a few weeks, your body adapts and stops changing.
- No plan. Random classes rarely add up to enough work for each muscle group.
- Not enough load. Body weight and light springs are a great start, but most bodies eventually need more.
How to build muscle with Pilates
- Add resistance. Heavier springs on the Reformer, or hand weights, ankle weights and a booty band on the Mat.
- Progress on purpose. Every exercise has an easier and a harder version. When the reps feel easy, move up.
- Slow it down. A slower lowering phase makes the same exercise harder without new equipment.
- Train each area twice a week. Spread upper body, lower body and core across the week.
- Eat enough, especially protein. Muscle needs fuel to rebuild. Our Nourish recipes are built around protein at every meal.
A week that works
This is the structure behind The Method in the Pilates Project app: six training days and one rest day. Short on time? The four priority days do most of the work. Want a ready-made plan? The Pilates X Strength Challenge starts Monday, November 30: twenty-one days of new classes with Maghan, plus a personal calorie and heart-rate plan.
Questions
How long does it take to see muscle from Pilates?
Most people feel stronger within a few weeks. Visible change usually takes longer and depends on load, consistency, sleep and food.
Is Reformer or Mat better for building muscle?
Both work. The Reformer makes it easy to add load with springs. On the Mat, add hand weights, ankle weights or a band.
Will Pilates make me bulky?
Building large muscles takes years of heavy, focused training. Pilates with added strength work builds lean, strong muscle.
Related reading
- Pilates vs. strength training
- How often should you do Reformer Pilates at home?
- What to eat before and after Pilates
