Susan Liu Pilates and Pregnancy Safe Physio-Led Classes for Every Trimester
August 7thA client once arrived at Kinematics at fourteen weeks pregnant with a reformer class timetable folded into her bag.
She had trained consistently before pregnancy. She knew the springs, the footbar settings, the exercises she liked, and the ones she usually avoided.
She wanted to know whether she should stop abdominal work. Whether lying on her back was still allowed. Whether reformer Pilates was safer than mat Pilates. Whether “listen to your body” was enough guidance when her body seemed to give different feedback every week.
Those are reasonable questions. They also point to the reason pregnancy Pilates should begin with an assessment.
At Kinematics, pregnancy Pilates sits within a broader clinical pathway that may involve Women’s Health Physiotherapy, Clinical Pilates, and where appropriate, Reformer Pilates.
The right pathway depends on your symptoms, trimester, exercise history, pelvic floor function, abdominal wall control, and what you want to stay capable of doing.
That might be running after birth. It might be lifting a toddler without pelvic heaviness. It might be continuing strength work without feeling uncertain every time your body changes.
The programme has to fit the person in front of us.
Why pregnancy Pilates is not one standard class
A body at nine weeks pregnant and a body at thirty four weeks pregnant are not solving the same movement problem.
In early pregnancy, the main barriers may be fatigue, nausea, breast tenderness, or a sudden drop in exercise tolerance.
A client may be technically capable of the same movements she performed before pregnancy, but only for half the volume. She may also start holding her breath during effort because she is tired or cautious.
Later in pregnancy, the problem often becomes more mechanical.
The abdomen changes the way the trunk organises under load. The rib cage may sit differently. The pelvis may feel less stable during single leg work. A side plank that previously felt controlled may now create visible abdominal doming, pelvic pressure, or breath-holding.
The body has changed.
That is why a standard prenatal sequence is limited.
It may be safe for some people on some days, but it cannot account for the client who has pelvic girdle pain when stepping onto the carriage, the client who feels heaviness after standing work, or the client whose abdominal wall manages load well in side-lying but not in long lever flexion.
Good pregnancy Pilates is built around repeated clinical reasoning.
What position is the client in. What is the load. What happens to her breathing. What happens to the abdominal wall. What symptoms appear during the session or later that day.
What changes in your body during pregnancy
Pregnancy changes how your body manages load, balance, pressure, and recovery.
One example is ligament laxity. Hormonal changes help prepare the pelvis for birth, but they can also make some joints feel less supported.
This does not mean your joints are fragile. It means your muscles often need to provide clearer control around the pelvis, hips, ribs, and lower back.
A client who previously moved comfortably through lunges may start to feel pain near the front of the pelvis or one side of the sacrum. The programme may need a smaller range, more support from the reformer, a change in foot position, or a shift away from single leg loading for a period.
Your centre of gravity also moves forward as pregnancy progresses. This can make standing balance work feel unfamiliar. A movement that used to feel like a glute exercise may now feel like a lower back effort because the body is using a different strategy to stay upright.
Breathing and pressure management are just as important.
As the abdominal wall lengthens, some people start to brace by pushing outward through the front of the abdomen or downward into the pelvic floor. You might see this as a ridge or dome along the midline of the abdomen during effort. You might feel it as heaviness, pressure, or leaking.
That feedback helps guide exercise selection.
It is one reason we use an initial assessment before placing pregnancy clients into group Clinical Pilates.
The assessment gives your physiotherapist a chance to see how your body responds before asking it to repeat loaded movement in a class setting.
First trimester Pilates and pregnancy
If you were doing Pilates before pregnancy, many familiar exercises may still be appropriate. The main changes usually relate to intensity, recovery, breathing, and symptom response.
A client who previously tolerated four sets of reformer footwork may now manage two sets well, then begin holding her breath and gripping through her upper abdominals. The exercise itself may still be suitable, but the dose is no longer right. Reducing repetitions, slowing the tempo, or increasing rest may make the same movement more useful.
Fatigue also changes decision-making. First trimester fatigue can be disproportionate to the session.
A class that feels manageable at the time may lead to a full day of exhaustion. That matters clinically. The goal is not to test how much you can push through. The goal is to find the amount of work your body can recover from.
Early pregnancy can feel confusing because you may not “look pregnant” yet, while your capacity has already changed.
That is enough reason to adjust the programme.
Second trimester pregnancy Pilates and reformer work
The second trimester is often when reformer Pilates becomes particularly useful.
As the abdomen grows, mat-based bodyweight work can become less predictable. Getting up and down from the floor may feel awkward. Supine positions may need limiting. Balance may be less reliable.
Some exercises that are technically simple can start to demand too much from the abdominal wall or pelvis.
A reformer offers more options because load can be adjusted through the springs, and the carriage can provide support. That said, reformer Pilates is not automatically appropriate just because it is low impact.
A second trimester client may need to avoid prolonged lying flat on her back, especially if she feels dizzy, nauseous, breathless, or unwell in that position.
Deep flexion exercises such as rollovers are usually removed because they create high abdominal pressure and no longer match the goal of training. Strong loaded rotation may also need modifying if it causes pelvic discomfort, abdominal doming, or loss of control.
Equipment set-up becomes part of the clinical reasoning.
Footbar height, spring tension, strap length, wedge support, and exercise position can all change the pressure and control demands of a movement.
A small adjustment may be the difference between an exercise that feels supportive and one that creates strain.
This is where physio-led Clinical Pilates is useful. The aim is not simply to keep you moving. It is to choose movement that matches the way your body is adapting.
The core and pelvic floor during pregnancy
Advice about the core during pregnancy is often too broad.
“Keep your core strong” can mean very different things depending on the person.
For one client, the priority may be learning to generate enough support through the lower abdomen and hips to reduce back fatigue during standing work. For another, the priority may be learning to stop gripping through the pelvic floor because she already holds too much tension and has pain with movement or difficulty relaxing.
Both clients may describe feeling “weak”. They do not need the same programme.
The pelvic floor has to contract, relax, and coordinate with breathing. During pregnancy, it also has to respond to the increasing load of the uterus and the changing position of the pelvis.
This is why Women’s Health Physiotherapy can be clinically justified before or alongside Pilates. It gives us more information about pelvic floor function, abdominal wall behaviour, symptoms, and what needs to be prioritised.
Some degree of separation is common as the abdomen grows.
The presence of a gap alone does not tell us whether an exercise is appropriate. What matters is how the tissue manages tension under load. If the midline domes strongly during an exercise and the client cannot control it with a change in breath, position, or load, that exercise needs modification. If the tissue maintains good tension and the client has no symptoms, some abdominal loading may be appropriate.
The decision should be based on response.
Third trimester Pilates for labour preparation
By the third trimester, the goal often shifts again.
For many clients, the priority becomes comfort, mobility, breath control, pelvic confidence, and maintaining enough strength for daily life. That daily life may include stairs, work, older children, disrupted sleep, and getting in and out of bed ten times a night.
Labour preparation also becomes more specific.
This means practising positions and breathing strategies that may be useful when the body is under stress. A session might include supported squats, side-lying hip strength, pelvic rocking, thoracic mobility, kneeling variations, or breath work linked to pelvic floor relaxation.
Third trimester Pilates should leave room for day-to-day variation.
Sleep, baby position, pelvic symptoms, swelling, and energy can change the session. Some days the programme may include strength and endurance. Other days, the most clinically appropriate session is slower, with more mobility, breathing, and symptom relief.
When to pause pregnancy Pilates and get assessed
You should pause and seek medical guidance if you experience bleeding, fluid leakage, chest pain, calf pain, regular painful contractions before term, faintness that does not settle, severe headache, sudden swelling, or any change in fetal movement that concerns you.
You should also raise symptoms with your physiotherapist if you notice pelvic heaviness, new leaking, abdominal doming that persists despite modification, pelvic pain that changes the way you walk, or pain that continues to flare after each session.
These symptoms do not always mean something serious is happening. They do mean the programme needs review.
A calm, precise response is better than pushing through uncertainty.
Sometimes the answer is a medical review. Sometimes it is a change in exercise selection. Sometimes it is reduced load for two weeks while symptoms settle.
The important part is that someone is paying attention.
Postnatal Pilates and returning after birth
Postnatal Pilates should not be treated as a quick return to the old programme.
Birth changes the starting point. Vaginal birth and caesarean birth both involve tissue recovery, but the considerations are different.
A vaginal birth may require closer attention to pelvic floor symptoms, heaviness, perineal healing, and confidence with pressure. A caesarean birth may require careful progression of abdominal loading, scar sensitivity, trunk control, and comfort with twisting or lifting.
The six week medical clearance is not a complete movement assessment.
It is a useful checkpoint. It does not tell us whether your pelvic floor is coordinating well, whether your abdominal wall can manage load, whether you are ready for planks, or whether running is a good idea yet.
A postnatal client may feel fine walking and still not be ready for jumping. She may feel strong in a reformer session but notice heaviness later that afternoon. She may be cleared medically but still feel like she cannot trust her core when lifting the pram.
At Kinematics, postnatal Clinical Pilates can sit alongside Women’s Health Physiotherapy when symptoms or goals justify it.
The aim is to rebuild capacity in a way that connects to real life, whether that means returning to gym training, running, sport, work demands, or feeling steady in the everyday load of parenting.
How to choose safe pregnancy Pilates classes
Before joining a pregnancy Pilates class, ask whether there is an individual assessment before group sessions.
Ask whether the programme changes by trimester and symptom presentation. Ask who modifies exercises if pelvic pain, leaking, abdominal doming, or dizziness appears. Ask whether the instructor is a physiotherapist or working from a clinically designed framework.
These questions are not about being difficult.
They are about making sure the class has enough information to keep the work appropriate.
A class that is safe for a low-risk second trimester client with no symptoms may not suit someone with pelvic girdle pain, a history of pregnancy loss, significant fatigue, abdominal wall concerns, or postnatal goals that require a more structured build.
Location and price matter. So does the quality of the reasoning behind the programme.
Start pregnancy Pilates with an assessment
Pregnancy Pilates can help you stay active, maintain strength, build confidence, and prepare for birth and recovery.
It does that best when it is specific.
Our Women’s Health Physiotherapists and physio-led Clinical Pilates team can assess where you are starting from, guide safe exercise choices, and adjust your programme as pregnancy progresses.
If you are pregnant and unsure what to keep, change, or stop, book an initial Women’s Health Physiotherapy or Clinical Pilates assessment with Kinematics.
We will help you understand what your body is doing, what your programme needs now, and how to keep moving with more confidence through pregnancy and postnatal recovery.
This article is for general education only and is not a substitute for personalised medical advice.