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Pregnancy brings plenty of changes, and one of the most common questions expectant mothers ask is whether they should keep exercising. Some worry that physical activity might harm the baby. Others feel so tired, nauseous or uncomfortable that exercise seems impossible. And many simply aren’t sure what’s safe as their bodies change week by week.
For most healthy pregnancies, regular physical activity is not only safe but beneficial. It can support fitness, mood, sleep and overall wellbeing, and help prepare the body for labour and recovery. That said, every pregnancy is different, and understanding exercise safety during pregnancy is important before starting or continuing an exercise routine.
The benefits of staying active
Exercise during pregnancy can help maintain cardiovascular fitness and muscle strength, making everyday activities easier as the body changes. Many women find it helps reduce common discomforts such as back pain, swelling and constipation.
Physical activity can support mental health too, helping manage stress, anxiety and low mood. Some women find it improves sleep, which can be difficult during pregnancy.
Staying active may also help with healthy weight gain and support recovery after birth. Strong core and pelvic floor muscles can be particularly helpful during pregnancy and postpartum.
Before you start
Before beginning or continuing an exercise program, talk to your GP, obstetrician, midwife or physiotherapist. They can assess your health and pregnancy and provide personalised advice.
Some women may be advised to modify or avoid certain types of exercise due to medical conditions or pregnancy complications. These might include certain heart or lung conditions, bleeding, placental issues, risk of preterm labour or other concerns.
If you were active before pregnancy, you can often continue many of your usual activities with some modifications. If you were less active, starting gently and building gradually is usually recommended.
First trimester: listen to your body
The first trimester can bring fatigue, nausea and hormonal changes that affect energy levels. Some days, exercise may feel manageable. Other days, rest may be more appropriate.
Gentle activities such as walking, swimming, stationary cycling, yoga and Pilates can be good options. Focus on consistency rather than intensity, and don’t be discouraged if your usual routine feels harder than normal.
Stay hydrated and avoid overheating, especially in hot weather.
Second trimester: building strength and staying comfortable
Many women feel more energetic during the second trimester, making it a good time to maintain regular activity. Strength training, swimming, walking, prenatal yoga and Pilates can help build strength and flexibility.
As the bump grows, balance may change, so exercises that carry a risk of falls or abdominal impact may need to be avoided. Lying flat on your back for extended periods may become uncomfortable or cause dizziness later in pregnancy, so many exercises can be modified to be performed seated, side-lying or standing.
Pelvic floor exercises are valuable throughout pregnancy and can help support bladder control and recovery after birth.
Third trimester: adapting to change
During the third trimester, the body continues to change rapidly. Energy levels may dip, and discomfort can increase. Exercise may need to become gentler, with a focus on mobility, posture, pelvic floor strength and breathing.
Walking, swimming and aqua aerobics are popular choices because the water supports body weight and can relieve pressure on joints. Prenatal classes designed specifically for late pregnancy can provide safe, supportive options.
Pay attention to how your body feels and adjust activity as needed.
Warning signs, physiotherapy and life after birth
Stop exercising and seek medical advice if you experience symptoms such as vaginal bleeding, fluid leaking from the vagina, chest pain, dizziness or fainting, severe headache, calf pain or swelling, regular painful contractions, shortness of breath before exercise, or reduced baby movements.
Women’s health physiotherapists specialise in supporting women through pregnancy and postpartum. They can assess pelvic floor function, address back and pelvic pain, recommend safe exercises and help women continue activities they enjoy. Clinical Pilates and pregnancy-specific exercise programs led by physiotherapists can provide tailored support and reassurance.
After birth, recovery takes time. Your healthcare provider can advise when it’s safe to return to exercise, particularly after a caesarean section or complicated delivery. Postnatal recovery often begins with gentle walking, pelvic floor exercises and core rehabilitation before gradually returning to higher-intensity activities.
Pregnancy is a time of significant change, and exercise can be a valuable way to support both physical and mental wellbeing. By choosing safe activities, listening to your body and working with qualified health professionals, you can stay active and healthy through every trimester and beyond.
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