--- title: 'Staying Active Across Pregnancy: What Changes Each Trimester' slug: staying-active-pregnancy-trimesters lifeStage: pregnancy category: Movement medicalReviewer: 'Dr Clare Bourne, Consultant Pelvic and Digestive Health Physiotherapist' reviewerId: 'https://blog.bloume.com/pregnancy/medical-board.md#clare-bourne' lastUpdated: '2026-08-08' primarySource: 'NHS: Pre-eclampsia' wordCount: 1498 readTimeInSeconds: 374.5 --- # Staying Active Across Pregnancy: What Changes Each Trimester Staying active across pregnancy trimesters can feel confusing when the guidance seems to shift week by week. The short version: movement helps throughout, but what feels manageable and what needs adapting changes as your pregnancy moves on. This article gives you a practical trimester-by-trimester picture, covers what to avoid at any stage, and explains in plain terms why keeping active matters. Always check with your midwife or GP before you start or change an exercise routine during pregnancy. **Q: How much exercise should you aim for during pregnancy?** A: The general guidance is at least 150 minutes of moderate activity a week, which you can break into sessions of any length. If movement is newer to you, starting with 10 to 15 minutes at a time is a sensible approach. Your midwife or GP can help you work out what suits your own situation. The tiredness of the first trimester, the shifting weight of the second, the sheer bulk of the third. Each phase genuinely changes what movement feels like and what your body needs from it. If you have searched for advice on staying active across pregnancy, you have probably found a mix of cautious generalities and contradictory specifics. One source says keep going as normal, another lists so many restrictions it is hard to know what is actually safe. Having a clear picture of the whole arc, rather than one stage at a time, makes it easier to stay consistent throughout. > **WARNING**: Before you start, continue, or change how you exercise during pregnancy, talk to your midwife, GP, or obstetric physiotherapist. This matters most if you have a multiple pregnancy, any pregnancy complications, or a health condition you already manage. What follows is general guidance, not personalised advice. ## What the current guidance suggests The general guidance is to aim for at least 150 minutes of moderate activity each week during pregnancy, spread however suits you across the week. If you were regularly active before pregnancy, you can usually carry on with your normal activities, with a few changes along the way. If movement is newer to you, starting with shorter sessions of around 10 to 15 minutes is a sensible way in. A simple way to gauge how hard you are working is the talk test. If you can hold a conversation while you move, your intensity is likely about right. If you get too breathless to speak comfortably, ease off. ## How staying active changes across pregnancy trimesters ### First trimester: carrying on with awareness The exhaustion of early pregnancy can land without much warning. You may find a routine you managed easily a few weeks ago now feels like too much, simply because your body is doing a significant amount of work behind the scenes. Nausea adds another layer, and some days the most realistic form of movement is a short walk. Carrying on with your usual routine in the first trimester is generally fine, as long as you pay attention to how your body responds. Fatigue and nausea are signals worth listening to. On days when symptoms are mild, carrying on as usual works well. On harder days, scaling back or resting is just as valid. Consistency across the weeks matters more than hitting a daily target. ### Second trimester: adapting as the bump grows You may find the second trimester brings a lift in energy after the fog of the first. Your bump becomes more visible and starts to change how movement feels in practice. Your centre of gravity shifts, and the ligaments that support your joints soften, which makes it easier to lose your balance and to strain a joint. Exercises that felt straightforward before may need some adjusting as you go. From around 16 weeks, it helps to avoid exercises that keep you lying flat on your back for long stretches. In that position, the weight of your bump can press on a major blood vessel and slow blood flow, which can leave you feeling faint or lightheaded. A few moments on your back is fine. It is the sustained positions flat on the floor that are best avoided from here on. ### Third trimester: comfortable movement and preparation By the third trimester, movement may feel slower and heavier. Your bump affects your balance more noticeably, breathlessness comes on sooner, and broken sleep can leave you with less energy to draw on. This is a good time to lean towards movement that feels genuinely comfortable. Walking, swimming, and gentle stretching tend to hold up well at this stage. Pelvic floor exercises are worth keeping up through all three trimesters, and the third is no exception. They involve gently contracting muscles that support your bladder, bowel, and womb. Aiming for at least three times a day is a practical target. Pelvic tilts, where you draw your tummy button gently towards your spine to flatten your lower back, can also ease the back discomfort that often builds in later pregnancy and help support your abdominal muscles. ## What to avoid across all trimesters Some activities carry specific risks at any point in pregnancy and are best set aside until after birth. - Contact sports where you could get hit, including kickboxing, judo, squash, football, and rugby. - Activities with a high chance of falling, such as horse riding, downhill skiing, ice hockey, gymnastics, and cycling on roads. A stationary bike is a safer swap for road cycling. - Scuba diving, which is unsafe during pregnancy because your baby has no protection from decompression sickness. - Exercise at high altitude, above 2,500 metres, which is best avoided during pregnancy. A few basics hold throughout. Warm up before you move and cool down afterwards, keep your fluids up, and take care not to overheat, especially in warm weather. If you go to an exercise class, let the instructor know you are pregnant and check they hold a qualification in prenatal exercise. ## When to pause or modify exercise: Pre-eclampsia and high-risk conditions Physical activity is widely recommended during pregnancy, but a diagnosis of pre-eclampsia changes how movement and rest should be managed. Because pre-eclampsia affects blood pressure and circulation, standard exercise advice no longer applies, and any activity needs to be guided directly by your midwife or consultant. Pause structured workouts: Anything that raises your heart rate significantly or puts sustained strain on your circulation is generally not suitable while pre-eclampsia is being actively managed. Your care team may advise stopping routine exercise altogether. Follow your individual plan: There is no single rule set for movement with pre-eclampsia. What is safe for you depends on how your blood pressure is responding and whether you are being monitored as an outpatient or in hospital. Even gentle movement, like walking, should be run past your care team first. ## Urgent symptoms to watch for Contact your midwife, maternity unit, or triage team immediately if you experience any of the following symptoms: • A severe, persistent headache • Changes to your vision, such as blurring or seeing flashing lights • Severe pain just below your ribs • Sudden or significant swelling in your face, hands, or feet • Nausea or vomiting If your symptoms feel severe or you are in any doubt, call 999 or go straight to your nearest maternity assessment unit. ## Why staying active matters Regular movement during pregnancy comes with a range of benefits for you. It can support healthy weight gain, lower the risk of high blood pressure and gestational diabetes, and improve your sleep and mood. It may also support a more manageable labour and birth, though this varies from person to person. For your baby, staying active may help support healthy growth. Staying active is also associated with a lower risk of premature birth and better blood flow to your baby, though the picture varies. What you are able to do will always depend on your own situation. If you have questions about specific activities, complications that affect what is safe for you, or symptoms that are making exercise difficult, raise these at your next midwife or antenatal appointment. --- **Q: How much exercise should you aim for during pregnancy?** The general guidance is at least 150 minutes of moderate activity a week, which you can break into sessions of any length. If movement is newer to you, starting with 10 to 15 minutes at a time is a sensible approach. Your midwife or GP can help you work out what suits your own situation. **Q: How do you know if you are exercising at the right intensity during pregnancy?** The talk test is a simple guide. If you can hold a conversation while you move, your intensity is likely about right. If you get too breathless to speak comfortably, it is worth easing off. This is a practical guide rather than a clinical measure. **Q: When should you stop exercising during pregnancy and seek advice?** Stop and call your midwife or GP if you notice chest pain, trouble breathing at rest, heavy vaginal bleeding, a severe headache, calf pain or swelling, your baby moving less, or anything that feels wrong. These are general signs worth prompt attention. If you are unsure whether a symptom matters, it is always better to check. **Q: Can you start exercising during pregnancy if you were not active before?** Yes, starting to exercise during pregnancy is generally fine, as long as you build up gradually. Beginning with shorter sessions of around 10 to 15 minutes and increasing slowly is a sensible way in. Talk it through with your midwife or GP first, especially if you have any complications or health conditions. **Q: Are pelvic floor exercises important throughout pregnancy?** Yes, pelvic floor exercises are worth keeping up throughout pregnancy. They involve gently contracting the muscles that support your bladder, bowel, and womb. Aiming for at least three times a day is a practical target, and you can do them in any position that feels comfortable. ### Clinical Sources - [NHS: Pre-eclampsia](https://www.nhs.uk/conditions/pre-eclampsia/) - [NHS: Pre-eclampsia](https://www.nhs.uk/conditions/pre-eclampsia/) - [Exercising in pregnancy](https://www.nhs.uk/best-start-in-life/pregnancy/exercising-in-pregnancy/) - [Exercising in pregnancy](https://www.nhs.uk/best-start-in-life/pregnancy/exercising-in-pregnancy/) - [Exercising in pregnancy](https://www.nhs.uk/best-start-in-life/pregnancy/exercising-in-pregnancy/) - [Keeping active](https://www.leedsth.nhs.uk/services/maternity/pregnancy/health-support/keeping-active/) - [Exercising in pregnancy](https://www.nhs.uk/best-start-in-life/pregnancy/exercising-in-pregnancy/) - [Keeping active](https://www.leedsth.nhs.uk/services/maternity/pregnancy/health-support/keeping-active/) - [Exercising in pregnancy](https://www.nhs.uk/best-start-in-life/pregnancy/exercising-in-pregnancy/) - [Exercising in pregnancy](https://www.nhs.uk/best-start-in-life/pregnancy/exercising-in-pregnancy/) - [Exercising in pregnancy](https://www.nhs.uk/best-start-in-life/pregnancy/exercising-in-pregnancy/) - [Fit for Pregnancy](https://thepogp.co.uk/_userfiles/pages/files/resources/21xxxxpogpffpregnancy_signed_off.pdf) --- Reviewed by Dr Clare Bourne, Consultant Pelvic and Digestive Health Physiotherapist | [Medical Board](https://blog.bloume.com/pregnancy/medical-board.md) | August 2026