Pregnancy is not the time to stop moving — it's the time to move smarter. The American College of Obstetricians and Gynecologists (ACOG) recommends that healthy pregnant women get at least 150 minutes of moderate-intensity aerobic exercise per week. And the benefits go far beyond physical fitness — regular exercise during pregnancy can ease common discomforts, reduce the risk of complications, and support your mental health through one of life's biggest transitions.
Of course, pregnancy changes your body significantly, and the exercise that's appropriate in week 8 is very different from what's appropriate in week 36. Here's a trimester-by-trimester guide to safe, effective prenatal movement — reviewed by OB-GYNs and backed by current evidence.
The benefits of staying active during pregnancy are well-documented and significant:
Before we get into trimester-specific exercises, here are the ground rules that apply throughout pregnancy:
The first trimester is often the hardest for exercise — not because it's medically dangerous, but because nausea, fatigue, and exhaustion make getting off the couch feel impossible. If that's where you are, be gentle with yourself. Even a 10-minute walk counts.
If you were exercising before pregnancy, you can generally continue at the same level in the first trimester with some modifications. If you weren't exercising, now is a great time to start with low-impact activities.
The most accessible and underrated pregnancy exercise. A brisk 30-minute walk daily counts as your recommended aerobic activity and can be done at any fitness level, in any trimester. Start your day with a walk to boost energy and ease morning nausea — many women find that gentle movement actually helps with nausea more than resting does.
Water exercise is ideal in pregnancy. The buoyancy reduces pressure on your joints, the water keeps you cool, and swimming provides excellent full-body cardiovascular conditioning without impact. Water aerobics classes specifically designed for pregnant women are widely available and allow you to maintain intensity while minimizing discomfort.
Prenatal yoga builds flexibility, balance, and core strength while incorporating breathing techniques that are invaluable during labor. It's also one of the best tools for managing pregnancy anxiety. Look for classes specifically labeled "prenatal yoga" — they avoid poses that compress the abdomen or require lying flat on the back for extended periods.
Great for cardiovascular fitness without the fall risk of outdoor cycling. As your belly grows, adjust the seat and handlebar height to maintain comfort. Keep intensity moderate.
Many women feel their best in the second trimester — nausea has typically eased, energy returns, and the bump is visible but not yet burdensome. This is a wonderful window to be active. Keep up with first trimester activities and add these:
Your pelvic floor supports your bladder, bowel, uterus, and the growing weight of pregnancy. Strengthening these muscles through Kegel exercises reduces the risk of urinary incontinence during and after pregnancy, supports vaginal delivery, and helps with postpartum recovery. To do a Kegel: contract the muscles you'd use to stop urination, hold for 5 seconds, release. Repeat 10–15 times, three times daily.
Light to moderate strength training is safe and beneficial in the second trimester. Focus on functional movements: squats, lunges, rows, shoulder presses, and modified push-ups. Use lighter weights with higher repetitions. Avoid exercises that require lying flat on your back — use an incline bench or perform seated or standing alternatives.
Pilates focuses on core strength, posture, and controlled movement — all of which are particularly valuable as your center of gravity shifts. Modified Pilates (avoiding supine positions after week 20) can significantly reduce back pain and improve body awareness through pregnancy and delivery.
Low-impact dance classes designed for pregnancy are joyful, social, and excellent cardio. They also support coordination and body confidence as your shape changes.
By the third trimester, your center of gravity has shifted significantly, your ligaments are more relaxed (due to the hormone relaxin), and your lung capacity is reduced as the baby pushes up on your diaphragm. Exercise should become gentler and more intentional — but it should not stop.
Still the gold standard. Even short, gentle walks support circulation, reduce swelling in the legs and feet, and may help encourage the baby into optimal position for birth. Walking also releases endorphins that help manage third trimester discomfort and anxiety about labor.
Even more beneficial in the third trimester, when the water's buoyancy provides relief from the weight of pregnancy. Many women find swimming one of the few exercises that feels truly comfortable at 32+ weeks.
Focus on hip openers, gentle spinal stretches, and breathing exercises. Cat-cow stretches, supported squats, and child's pose (widened to accommodate the belly) are excellent for relieving lower back and hip tension common in late pregnancy.
Sitting and gently bouncing on a birth ball helps relieve pelvic pressure and encourages optimal fetal positioning. Hip circles on the ball can ease back pain and are also used as a labor support tool. Many hospitals and birthing centers have birth balls available during labor.
Stop exercising immediately and contact your healthcare provider if you experience:
While most moderate exercise is safe, certain types carry specific risks during pregnancy that make them unsuitable, particularly beyond the first trimester:
Fatigue and nausea may make exercise feel challenging. Don't force intense sessions — listen to your body. Walking, gentle yoga, swimming, and light resistance training are all appropriate. Avoid very high-impact activities if you're at increased risk of miscarriage (discuss with your doctor), but for most uncomplicated pregnancies, continuing pre-pregnancy exercise at the same level is safe.
Often the most comfortable trimester for exercise. Energy typically returns, and your bump is not yet large enough to significantly affect balance or comfort. This is often the best window for maintaining or building fitness. Avoid lying exercises after 16 weeks; add modifications as the bump grows.
Modify as needed. Your centre of gravity has shifted, balance is affected, and joints are more mobile due to relaxin hormone — increasing injury risk in sudden movements. Reduce impact, prioritise walking, swimming (excellent throughout pregnancy), and prenatal yoga. Pelvic floor exercises are particularly valuable in this trimester.
The evidence for exercise during pregnancy is clear and consistent:
Unless your midwife or doctor has advised you to reduce activity due to a specific pregnancy complication, regular moderate exercise is one of the most beneficial things you can do for yourself and your pregnancy.
Use our free Pregnancy Due Date Calculator to know exactly which trimester you're in and track key milestones.
Check My Pregnancy Week →Moving your body during pregnancy is one of the most loving things you can do for yourself and your baby. Find activities you genuinely enjoy, listen to your body's feedback, and don't be afraid to modify as your pregnancy progresses. Every trimester brings its own movement possibilities — and the goal is consistency, not intensity.