Prenatal Pilates on the Reformer: Is It Safe?
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If you're pregnant and wondering whether you can keep using your pilates reformer, you're not alone. Reformer pilates is one of the most popular forms of exercise during pregnancy, and for good reason — it's low-impact, it builds the kind of core and pelvic floor strength that makes labour and recovery easier, and it can be adapted at almost every stage of pregnancy. But 'can I do reformer pilates while pregnant' is a fair question, and the honest answer is: yes, for most people, with the right modifications and medical clearance.
Why Reformer Pilates Suits Pregnancy So Well
A pilates reformer uses a sliding carriage, adjustable springs, and a supportive frame to guide movement through a controlled range of motion. Unlike free weights or high-impact cardio, the reformer lets you scale resistance instantly by changing the springs, which makes it one of the safer pieces of home or studio equipment to keep using as your body changes. The carriage also supports your body weight during many exercises, reducing strain on joints that are already loosening due to the hormone relaxin.
For expecting mums doing reformer pilates at home or in a studio, the main benefits are:
- Core and pelvic floor conditioning that doesn't rely on crunches or lying flat on your back for extended periods after the first trimester
- Improved posture as your centre of gravity shifts
- Better circulation and reduced lower back pain, a common complaint by the second trimester
- Continued strength and mobility, which supports an easier labour and faster postnatal recovery
Trimester-by-Trimester Guidance
First trimester: Most standard reformer pilates exercises are fine, assuming you had no complications before pregnancy and your doctor has cleared exercise. This is a good time to build the habit if you're new to reformer pilates for home use, since energy levels are often still high and there are few structural limitations yet.
Second trimester: This is where real modifications start. Supine (lying on your back) exercises should be limited, since the weight of the growing uterus can compress the vena cava and reduce blood flow. A qualified reformer pilates instructor will shift you toward side-lying, seated, kneeling, and standing exercises on the reformer instead. Deep spinal flexion and rotation — the kind of twisting crunch movements common in general mat pilates — are usually avoided.
Third trimester: Balance becomes the bigger consideration as your centre of gravity moves. Reformer work is actually well suited here because the carriage and straps offer more stability than free-standing exercise. Expect lower springs (less resistance, more control), shorter ranges of motion, and a focus on breathing, pelvic floor connection, and gentle strength maintenance rather than intensity.
What to Avoid on the Reformer While Pregnant
- Prolonged flat-back lying positions after roughly 16-20 weeks
- Deep abdominal flexion or crunch-style movements that strain the linea alba (the connective tissue that can separate as diastasis recti)
- Overstretching — relaxin makes joints more mobile, so it's easy to overextend without realising it
- Any exercise that causes dizziness, shortness of breath, pain, or reduced foetal movement
- High-intensity, breath-holding effort — pilates should feel controlled, not maxed out
Reformer Pilates for Home vs a Reformer Studio
Some pregnant clients prefer a reformer studio during pregnancy specifically because an instructor can watch form and cue modifications in real time — genuinely useful when your body is changing week to week. Others prefer the flexibility of a home reformer, especially in the third trimester when energy for travel is limited and a five-minute session between naps is more realistic than a studio class. If you're using a home reformer, look for an instructor who offers pregnancy-specific programming (many now do this online) rather than guessing at modifications yourself.
If you're shopping for a pilates reformer for home use specifically because you're pregnant or planning to be, prioritise a reformer with a sturdy frame, a wide carriage for stability, and easily adjustable spring tension, since you'll want to scale intensity down smoothly as pregnancy progresses rather than swapping equipment.
When to Check With Your Doctor First
Reformer pilates is broadly considered safe in an uncomplicated pregnancy, but you should get specific clearance from your doctor or midwife if you have, or have had, any of the following: placenta praevia, preeclampsia, a history of preterm labour, incompetent cervix, multiple pregnancy (twins or more), or any bleeding during this pregnancy. If in doubt, ask before you get on the reformer, not after.
The Bottom Line
Reformer pilates is one of the more pregnancy-friendly exercise options available, precisely because it's so adjustable — the same equipment that challenges an advanced athlete can be dialled right back for a third-trimester session focused purely on breath and gentle mobility. Whether you're working with an instructor in a reformer studio or on your own reformer for home, the key is modifying as you go, listening to your body, and not being afraid to change or skip an exercise that doesn't feel right that day.
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Shop a reformer that grows with you: the Original Reformly.