Pilates and pregnancy: staying strong, one trimester at a time
Pregnancy changes how your body moves, week by week, and it’s natural to wonder how much exercise is still safe. Pilates can be one of the steadier ways to stay strong through pregnancy — provided the program is adjusted to your stage, and the technique is precise.
What’s changing in your body — and why it matters
As your baby grows, so does the load on your body. Your centre of gravity shifts forward, your posture adapts, and a hormone called relaxin loosens the ligaments around your joints to help your body prepare for birth. That’s useful for labour, but it also means your joints are less stable and easier to strain if movement isn’t controlled.
That’s why breath, stretch and technique matter more during pregnancy, not less. Pilates works well here because it was never about big, fast movement — it’s slow, precise, and built on control.
It’s not about doing less — it’s about doing it right
A common assumption is that pregnancy means stepping back from exercise altogether, or that any Pilates class will do. Neither is quite right. The better approach isn’t doing less — it’s doing it more precisely, with a program adjusted to your trimester and an instructor watching your technique closely.
Trained specifically in pregnancy Pilates
I’m Kat, and I’ve been teaching mat Pilates for 14 years — pregnancy Pilates is part of my ongoing training, through Polestar Pilates, Pilates Anytime and Body Organics. In small classes, that means real, one-to-one attention: watching how you move, adjusting exercises as your pregnancy progresses, and making sure nothing strains your changing body.
Before starting or continuing any exercise program during pregnancy, always check with your GP, obstetrician or midwife.
The right level for each trimester
First trimester
Energy can be unpredictable, so this stage is about building the foundations: diaphragmatic (“belly”) breathing, and a gentle connection to your core and pelvic floor. Pace is set by how you feel, day to day.
Second trimester
As your bump grows and your posture shifts forward, the focus moves to postural strength — upper back, shoulders and glutes — to help you carry the extra weight comfortably. Stretching through the hips and chest becomes more important, and positions lying flat on your back are shortened or adapted.
Third trimester
This is where technique matters most. Movements become smaller and more controlled, breath work starts to double as rehearsal for labour, and we avoid deep forward flexion and inversions. Side-lying and supported positions do more of the work.
Posture, loose ligaments and abdominal separation, explained
A few things are worth understanding plainly.
• Posture — As your baby grows, your centre of gravity moves forward and your lower back and shoulders compensate. Strengthening your upper back and glutes helps you carry that weight with less strain, and supports the same posture afterwards.
• Ligaments — Relaxin loosens the ligaments around every joint, not just the ones preparing for birth — hips, wrists and knees included. That’s why movements favour control over depth of stretch.
• Abdominal separation — As your abdominal muscles stretch to make room for your baby, some separation along the midline (diastasis recti) is a normal part of pregnancy. Precise, gentle core work — engaging deeply rather than working hard — helps support that area rather than strain it.
If you notice pain, doming along your abdomen, or anything that concerns you, let your instructor know and check in with your GP or midwife.
Breath, stretch, technique: the simple version
Pilates during pregnancy comes down to a few simple things: controlled breath, careful stretch, and technique adjusted to exactly where you are. Done that way, it’s one of the steadier ways to stay strong through nine months of real change.
Start with one class
If you’re pregnant and wondering where to start, come in for one class and I’ll build a program around your stage of pregnancy. Get in touch with Active Pilates to find a time that suits.