Safe Exercises During Pregnancy
Exercise During Pregnancy: Why It Matters
Staying active during pregnancy offers substantial benefits for both you and your baby. According to ACOG Committee Opinion No. 804, regular moderate-intensity exercise during pregnancy is safe for most women and is associated with reduced risk of gestational diabetes, preeclampsia, preterm birth, and cesarean delivery. It also helps manage weight gain, reduces back pain, improves mood, and can make labor and recovery easier.
The American Heart Association recommends that pregnant women without contraindications get at least 150 minutes of moderate-intensity aerobic activity per week — the same target as for the general adult population.
General Safety Guidelines
Before starting or continuing an exercise program during pregnancy, check with your healthcare provider. Most healthy pregnant women can safely exercise, but certain conditions — including placenta previa, preterm labor risk, or preeclampsia — may require modified activity or rest.
During exercise, avoid lying flat on your back for extended periods after the first trimester, as the weight of the uterus can compress the vena cava and reduce blood flow. Stay well hydrated, avoid overheating, and choose supportive footwear. Watch for warning signs: chest pain, shortness of breath at rest, dizziness, calf pain or swelling, vaginal bleeding, or decreased fetal movement. Stop exercising and contact your provider if any of these occur.
First Trimester (Weeks 1–12)
The first trimester is often the most challenging due to fatigue and nausea, but continuing gentle exercise can actually help manage both. Your center of gravity has not yet shifted significantly, so most pre-pregnancy activities are still safe.
Walking is one of the safest and most accessible forms of exercise throughout pregnancy. A brisk 30-minute walk most days delivers cardiovascular benefits without impact stress.
Swimming and water aerobics provide a full-body workout while the water supports your weight, reducing strain on joints and ligaments. The buoyancy also makes it ideal as pregnancy progresses.
Yoga and Pilates — especially prenatal classes — build core strength and flexibility, improve posture, and teach breathing techniques useful in labor. Avoid hot yoga due to overheating risk.
If you were running or doing high-intensity workouts before pregnancy, you can typically continue at a reduced intensity as long as you feel comfortable and your provider approves.
Second Trimester (Weeks 13–26)
The second trimester is often the most energetic period. Nausea typically subsides and energy returns. Your abdomen is now visibly larger, which begins to affect balance.
Prenatal strength training using light to moderate weights or resistance bands is beneficial. Focus on exercises that strengthen the back, glutes, and core to support your growing belly and reduce lower back pain. Avoid exercises that require lying flat on your back.
Stationary cycling is excellent in the second trimester when your changing center of gravity makes outdoor cycling riskier.
Low-impact aerobics and dance classes designed for pregnancy maintain cardiovascular fitness while accommodating your growing belly.
Avoid contact sports, activities with a fall risk (skiing, horseback riding), and anything requiring breath-holding or heavy straining.
Third Trimester (Weeks 27–40)
As your belly grows, comfort becomes the priority. Reduce intensity and duration as needed — listen to your body. Pelvic girdle pain and round ligament pain are common and may limit some activities.
Walking and swimming remain ideal right up until your due date for most women. Water workouts are particularly comfortable in late pregnancy.
Prenatal yoga continues to be valuable for relaxation, breathing practice, and maintaining flexibility.
Pelvic floor exercises (Kegels) can be done at any point during pregnancy and are especially important in the third trimester. Strengthening these muscles supports the uterus, bladder, and bowels, and helps with postpartum recovery.
After Delivery
Returning to exercise postpartum should be gradual. Most women can resume gentle walking soon after delivery. Higher-intensity exercise is typically safe after the six-week postpartum visit, or longer if you had a cesarean section or complications. Pelvic floor exercises can begin almost immediately and are highly recommended.
Exercise is one of the most positive investments you can make for your health and your baby’s health during pregnancy. Start with what feels manageable, build gradually, and prioritize enjoyment — staying consistent matters more than intensity.