Pregnancy is one of the most exciting and life-changing experiences a woman can go through.
It's also a time when many mums-to-be have lots of questions about exercise.
Is it still safe to work out?
Should you stop running?
Can you lift weights?
Will exercise affect your baby?
The good news is that for many women with an uncomplicated pregnancy, staying active can offer significant health benefits for both mum and baby. The key is understanding how your body changes throughout pregnancy and adapting your exercise routine accordingly.
Every pregnancy is unique, so it's always important to follow the advice of your midwife, doctor or maternity team, particularly if you have any medical conditions or pregnancy complications.
Let's explore what current guidance recommends.
Is It Safe to Exercise During Pregnancy?
For many healthy pregnancies, the answer is yes.
Regular physical activity can help support both your physical and mental wellbeing throughout pregnancy.
Exercise during pregnancy has been linked with benefits such as:
- Improved cardiovascular fitness.
- Better mood and reduced stress.
- Increased energy levels.
- Better sleep.
- Reduced back pain.
- Improved posture.
- Lower risk of excessive pregnancy weight gain.
- Better preparation for labour and recovery after birth.
Exercise doesn't have to mean intense workouts.
Simple activities like walking or swimming can provide excellent benefits.
The goal isn't to become an elite athlete.
The goal is to stay healthy, comfortable and active.
Speak to Your Midwife or Doctor First
Although exercise is recommended for many women, some pregnancies require extra care.
Always seek medical advice before starting or continuing exercise if you have conditions such as:
- Significant heart or lung disease.
- Certain pregnancy complications.
- Persistent vaginal bleeding.
- Placenta-related concerns.
- Severe anaemia.
- Signs of premature labour.
- Pre-eclampsia or pregnancy-induced high blood pressure.
Your healthcare team can advise which activities are appropriate for your individual circumstances.
How Pregnancy Changes Your Body
Pregnancy affects almost every part of your body.
As your baby grows, your body adapts in remarkable ways.
These changes include:
- Increased blood volume.
- Higher resting heart rate.
- Looser joints due to pregnancy hormones.
- A shifting centre of gravity.
- Changes in balance.
- Increased breathing rate.
- Growing demands on your muscles and cardiovascular system.
These changes explain why workouts that once felt easy may suddenly feel much harder.
Listening to your body becomes more important than ever.
First Trimester (Weeks 1–12)
Many women are surprised by how tired they feel during early pregnancy.
Fatigue, nausea and hormonal changes can make exercise difficult.
That's perfectly normal.
If you're feeling well enough, gentle activities may include:
- Walking.
- Swimming.
- Stationary cycling.
- Prenatal yoga.
- Light strength training.
- Gentle stretching.
Some women continue exercising much as they did before pregnancy during this stage, while others need to reduce their intensity because of fatigue.
Neither approach is "better."
Listen to your body.
Second Trimester (Weeks 13–27)
Many women describe the second trimester as the most comfortable stage for exercise.
Morning sickness often improves.
Energy levels may increase.
Your growing bump does mean you'll need to adapt certain movements.
Good options include:
- Brisk walking.
- Swimming.
- Water aerobics.
- Elliptical training.
- Stationary cycling.
- Pregnancy fitness classes.
As your centre of gravity changes, balance becomes increasingly important.
Avoid exercises where there's a significant risk of falling.
Third Trimester (Weeks 28–Birth)
During the final months of pregnancy, your body works incredibly hard every day.
Even everyday tasks may leave you feeling breathless.
Exercise often becomes gentler and more focused on maintaining mobility.
Suitable activities include:
- Gentle walking.
- Swimming.
- Stretching.
- Pelvic floor exercises.
- Pregnancy yoga.
- Light mobility work.
Many women naturally shorten their workouts during this stage.
That's completely normal.
The aim is simply to keep moving safely.
Best Cardio Exercises During Pregnancy
Walking
Walking is one of the safest and most accessible forms of exercise during pregnancy.
It improves cardiovascular fitness without placing excessive stress on your joints.
It's also easy to adjust based on how you're feeling each day.
Swimming
Swimming is often considered one of the best pregnancy exercises.
The water supports your growing body while reducing pressure on your joints and back.
Many women also find swimming helps relieve swelling and discomfort.
Stationary Cycling
Indoor cycling on a stationary bike provides cardiovascular benefits while reducing the risk of falling compared with cycling outdoors.
Adjust the resistance so you're exercising comfortably rather than pushing yourself to exhaustion.
Elliptical Cross Trainer
The smooth movement of an elliptical trainer provides effective low-impact cardio while reducing impact on the knees and hips.
Prenatal Fitness Classes
Many communities offer pregnancy-specific exercise classes led by qualified instructors.
These sessions are designed to suit the changing needs of pregnancy while also providing a chance to meet other expectant mums.
Can You Lift Weights During Pregnancy?
For many women, strength training can still be appropriate.
The focus should shift away from lifting maximum weights and towards maintaining strength with good technique.
Choose manageable loads that allow you to move comfortably while maintaining proper form.
Avoid holding your breath while lifting.
Breathing steadily throughout each repetition is important.
If you're new to strength training, pregnancy is usually not the time to begin very heavy lifting programmes.
Don't Forget Your Pelvic Floor
Your pelvic floor muscles support your bladder, bowel and uterus.
Pregnancy places increasing demands on these muscles.
Regular pelvic floor exercises may help improve muscle strength and support recovery after childbirth.
Your midwife or physiotherapist can explain the correct technique if you're unsure.
Activities to Avoid
As pregnancy progresses, certain activities become less suitable because they increase the risk of injury.
Examples may include:
- Contact sports.
- Activities with a high risk of falling.
- Scuba diving.
- High-impact jumping exercises if uncomfortable.
- Exercises that cause pain or dizziness.
As your pregnancy develops, your healthcare professional may also advise avoiding prolonged periods lying flat on your back for some exercises.
Always follow their guidance.
Warning Signs to Stop Exercising
Stop exercising and seek prompt medical advice if you experience:
- Chest pain.
- Severe breathlessness.
- Dizziness or fainting.
- Vaginal bleeding.
- Fluid leaking from the vagina.
- Regular painful contractions.
- Severe abdominal pain.
- Reduced baby movements later in pregnancy.
- Severe headache or vision changes.
While these situations are uncommon, recognising them is important.
Staying Hydrated
Pregnancy increases your body's fluid needs.
Drink water regularly throughout the day and before, during and after exercise.
Exercising in hot weather may require additional fluids.
Wearing loose, breathable clothing can also help prevent overheating.
How Often Should You Exercise?
Current guidance generally encourages pregnant women without medical complications to aim for regular moderate physical activity throughout the week.
The exact amount will vary depending on your health, fitness level and how your pregnancy is progressing.
Some days you may feel energetic.
Other days, a gentle walk may be more than enough.
That's perfectly okay.
Looking After Your Mental Wellbeing
Exercise isn't only about physical health.
Many expectant mums find that regular movement helps them:
- Feel calmer.
- Sleep better.
- Reduce stress.
- Improve confidence.
- Feel more connected to their changing body.
Pregnancy can bring emotional ups and downs.
Even a short walk outdoors can sometimes make a noticeable difference.
CardioFire Challenge
This week, aim to include some gentle movement on most days.
That could be:
- A comfortable walk.
- A swim.
- Prenatal yoga.
- Gentle stretching.
- Pelvic floor exercises.
Rather than focusing on calories or performance, focus on how movement makes you feel.
If you finish feeling more relaxed, energised or comfortable than when you started, you've achieved something worthwhile.
Final Thoughts
Pregnancy doesn't automatically mean putting your fitness journey on hold.
For many women, staying active is one of the best ways to support both physical and emotional wellbeing throughout pregnancy.
The key is recognising that your body is doing something extraordinary.
Exercise during pregnancy isn't about pushing harder or setting personal bests.
It's about moving safely, listening to your body and adapting as your pregnancy progresses.
Every walk, every swim and every gentle workout is an investment in your health and the incredible journey ahead.
Most importantly, remember that every pregnancy is different. Always follow the advice of your midwife, doctor or maternity team, and never feel guilty about adjusting your routine as your body changes.
Staying active isn't about perfection.
It's about caring for yourself while your body does one of the most amazing jobs it will ever do.
