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Safe Exercises During Pregnancy: Your Trimesters Movement Guide

  • December 19, 2025

Stay Strong, Stay Flexible: Modifications and Must-Know Tips for Every Mum-to-Be

Growing a human is, quite literally, a marathon. Your body is doing incredible, demanding work, and while re-sting is crucial, movement is just as important. For many mums-to-be, exercising is one of the best ways to manage pregnancy discomfort, boost energy, improve sleep, and prepare the body for labour and recovery. But when everything is shifting your balance, your energy levels, and even your joints, knowing which movements are safe exercises during pregnancy can be confusing. Are crunches still okay? When should I stop running? And what on earth is a pelvic floor?

Don't worry, mama. We're here to cut through the confusion and provide a guide, with the support of health experts, on how to keep moving confidently and safely, trimester by trimester. Remember, the goal is not to train for a race, but to support your body's amazing journey.

The Golden Rules of Pregnancy Exercise

Before we dive into trimester-specific tips, these foundational guidelines apply from the moment you find out you’re pregnant right up until your due date:

1. Get the All-Clear First

Always talk to your GP or Obstetrician before starting or continuing an exercise routine. For tailored, professional advice, we highly recommend seeing a specialist who understands the unique mechanics of the pregnant body. The Mama Physio is an incredible resource for navigating these physical changes with confidence.

2. Listen to Your Body

Ditch the 'no pain, no gain' mindset. If something hurts, stop immediately. Pregnancy is not the time to push for personal bests; it’s the time to maintain fitness.

3. Stay Hydrated and Cool

Your core body temperature rises more easily during pregnancy. Avoid overheating by exercising in cool environments, wearing light clothing, and sipping water constantly. Dehydration is a major no-no.

4. Don't Lie Flat on Your Back (After 12 Weeks)

After the first trimester, avoid exercises where you lie flat on your back for extended periods. This position allows the weight of your uterus to compress a major vein (the Vena Cava), which can reduce blood flow to you and your baby. Modify these exercises by propping yourself up with a wedge or cushions (or maybe even a Sleepybelly Pregnancy Pillow!).

First Trimester: Managing Fatigue and Nausea (Weeks 1-12)

The first trimester is often a surprise: you might look completely normal on the outside, but inside, you feel completely exhausted! Hormonal changes are intense, and nausea can make anything but the sofa feel impossible.

  • Goal: Consistency, not intensity. Maintain your pre-pregnancy routine where possible.

  • What Works:

    • Walking: A fantastic, low-impact option.

    • Swimming: Weightless movement can be a relief.

    • Prenatal Yoga/Pilates: Ideal for developing core and pelvic floor awareness.

  • Modifications:

    • Lower the Intensity: If you were a runner, swap two runs a week for long, brisk walks.

    • Exercise When Energy is Highest: If you have an afternoon energy slump, try to squeeze in a short walk in the morning.

  • Pilates Support: If you want to maintain your strength early on, All For One specialises in pregnancy-safe Pilates and yoga that can help you manage those early symptoms.

Second Trimester: The ‘Golden Phase’ (Weeks 13-27)

Hello, energy! The nausea usually eases, and you might feel a renewed motivation to move. This is often the safest and most comfortable time to be active, but your growing bump means you need to start being mindful of your core.

  • Goal: Building and maintaining strength, stability, and flexibility.

  • What Works:

    • Strength Training: Focus on functional movements like squats, lunges, and rows, using light to moderate weights.

    • Dance or Spin Class: Great cardiovascular boost, provided you avoid movements that involve jerking or sudden changes in direction.

    • Aquanatal Classes: Water-based fitness is low-impact and supportive for your joints.

Avoiding Diastasis Recti

As your belly grows, abdominal muscles can separate. To ensure you are engaging your core correctly and avoiding "doming," Mortdale Physiotherapy can provide a professional assessment and safe exercise modifications tailored to your bump.

  • Crunches or Sit-ups: Switch to standing or side-plank variations.

  • Twisting Movements: Keep rotational exercises to a minimum.

  • Planking: Progressively modify from a full plank to a plank on your knees, or a plank against a wall, as your bump gets bigger.

Third Trimester: Slowing Down and Supporting the Body (Weeks 28+)

Your focus shifts to preparing for birth and making yourself comfortable. As your bump gets larger, your centre of gravity shifts, making you more prone to trips and falls. Joint laxity also increases due to the hormone relaxin.

  • Goal: Gentle, joint-friendly movements, improving circulation, and focusing on pelvic floor strength.

  • What Works:

    • Walking: Reduce pace and duration; break walks into smaller segments.

    • Pelvic Floor and Deep Core Work: This is crucial preparation for labour!

    • Prenatal Pilates/Barre: Excellent for maintaining posture and deep muscle stability.

The Circulation Superstars

Swollen ankles and tired legs are common third-trimester complaints. Gravity is not your friend! Ensuring good circulation is a critical part of safe exercises during pregnancy.

  • Maternity Compression Socks: If you’re active, on your feet a lot, or feeling heavy and swollen, wearing Sleepybelly Maternity Compression Socks can significantly help. They promote blood flow back up the legs, which reduces swelling (oedema) and decreases the risk of developing DVT (Deep Vein Thrombosis), a risk factor that increases with pregnancy.

  • Leg Exercises: Focus on ankle circles and heel raises throughout the day, especially if you have been sitting for a long time.

Don't Forget the Pelvic Floor

No pregnancy movement guide is complete without talking about the pelvic floor. These muscles support your bladder, uterus, and bowels. Training these muscles is vital for managing continence and recovery. For a step-by-step guide on the correct technique, visit the Continence Foundation of Australia.

  • Practice: Squeeze and lift your pelvic floor muscles as if you are trying to stop passing wind and urine simultaneously. Hold for 5–10 seconds (the 'power lift'), then do rapid 1-second squeezes (the 'flicker'). Do these regularly throughout the day, every day!

Relax and Recover

After a workout, or on days when you choose rest, make sure you look after your muscles. Stretching is vital to relieve tension, and using products that soothe tired bodies can aid recovery.  Our Sleepybelly Magnesium Body Cream is perfect for massaging into tired, aching hips and legs to help you recover faster.

When to Stop Exercising Immediately

While exercise is generally safe, there are warning signs you must never ignore. Stop exercising and seek medical advice from a professional (like those at The Mama Physio) if you experience:

  • Vaginal bleeding or fluid leakage.

  • Persistent pain in the chest, pelvis, or abdomen.

  • Sudden dizziness or feeling faint.

  • Difficulty breathing before starting to exercise.

  • Regular, painful contractions.

  • Calf pain or severe swelling.

Conclusion

Movement is powerful, mama. It helps you sleep better, manage your weight gain, improve your mood, and ultimately, it empowers you for the physical demands of birth and motherhood. By following these guidelines and listening to your amazing body, you can confidently and safely include safe exercises during pregnancy in your routine, keeping you strong right up until the day you meet your beautiful bub.  For more advice on staying active and healthy, you can explore our full Sleepybelly Guide to Pregnancy Wellness, where we share more tips to support your journey.

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How to Put On Pregnancy Compression Socks Without Straining Your Belly

How to Put On Pregnancy Compression Socks Without Straining Your Belly

The Physical struggle of pulling on tight compression socks over a growing bump can cause you to strain your lower back or compress your abdomen. By transitioning to the "Inside-Out Method" and adjusting your physical posture, you can slide your garments on seamlessly without putting any pressure on your belly.

Treating compression fabric like a standard sock by scrunching it into a ring creates immense structural resistance. Instead, convert the garment into an accessible foot pocket: slide your hand inside to pinch the heel, peel the long leg sleeve backward so it is completely inside-out down to the ankle, slide your foot into the waiting pocket, and smoothly unroll the fabric up your calf. To keep your abdominal area entirely clear while doing this, use the "Cross-Ankle Lounge" posture on a couch or place your foot on a low step stool so your knees can flare naturally to the sides.

Should You Wear Compression Socks to Bed While Pregnant?

Should You Wear Compression Socks to Bed While Pregnant?

For most expectant mothers, the general rule is to avoid wearing tight, firm compression socks to sleep overnight. Graduated compression garments are specifically engineered to assist your veins in working against gravity while you are upright—standing, sitting, or walking. When you lie flat, gravity stops pulling blood and extra fluids down into your lower limbs, allowing your circulation to naturally even out. Wearing high-pressure stockings horizontally is not only unnecessary, but it also carries a risk of constriction; if the fabric bunches or rolls as you toss and turn, it can create a tight band around your calf that actively restricts blood flow.

The ideal routine is to wear your maternity compression socks for about 30 minutes during your evening wind-down, then slide them off right before you turn out the light. This short pre-bed window provides a final circulation boost to move the day's residual fluid and ease that restless, twitchy end-of-day feeling.

An overnight exception exists only if you are dealing with severe Restless Legs Syndrome (RLS) or intense throbbing that keeps you awake. In those cases, wearing a gentle, low-pressure (15-20 mmHg), breathable garment made from a soft bamboo blend is acceptable, provided it does not dig into your skin. Otherwise, you can support your nighttime circulation bare-legged by utilizing a modular pregnancy pillow to maintain a strict side-sleeping position, which keeps your heavy uterus from compressing the inferior vena cava (the main pelvic vein returning blood to your heart).

Why Pregnancy Swelling Feels Worse at Night, and What Can Help

Why Pregnancy Swelling Feels Worse at Night, and What Can Help

Evening swelling, or gestational oedema, is a common pregnancy symptom caused by increased blood and fluid volume. This puffiness peaks at bedtime due to a combination of daytime gravity pulling fluids downward and your growing uterus compressing the inferior vena cava, which restricts lower-body circulation. When you finally lie flat, your body begins reabsorbing this pooled fluid to be filtered through your kidneys, resulting in a tight, throbbing sensation in your lower limbs just as you try to drift off.

To prevent this evening spike, implement a proactive routine earlier in the day. Front-load your hydration by drinking the majority of your water before 4 pm to help your kidneys flush excess fluid without keeping you awake with a full bladder. When relaxing, elevate your feet above heart level using pillows to let gravity assist your veins, and wear graduated maternity compression socks during the day to provide steady mechanical support that prevents fluid from pooling in the first place. Conclude your evening by massaging a non-greasy magnesium cream into your calves to relieve skin tightness, then settle into a supportive side-sleeping position with a modular pregnancy pillow to keep your pelvic veins completely clear of uterine pressure overnight.

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