GUIDE
ACOG recommends at least 150 minutes of moderate-intensity aerobic activity per week during pregnancy for people with uncomplicated pregnancies.
Exercise during pregnancy is not just safe — it is beneficial. It reduces the risk of gestational diabetes, preeclampsia, and cesarean delivery. It also improves mood, sleep, and postpartum recovery. The key is choosing the right activities and knowing your limits.
Be prepared from day one
ACOG is clear: exercise during pregnancy is not just safe — it is recommended. For people with uncomplicated pregnancies, the guidelines call for at least 150 minutes per week of moderate-intensity aerobic activity. That is about 30 minutes on most days of the week.
The evidence-based benefits are significant. Regular exercise during pregnancy reduces the risk of gestational diabetes by up to 50 percent, lowers the risk of preeclampsia, decreases the likelihood of cesarean delivery, and improves mental health. It also helps with common discomforts like back pain, constipation, bloating, and swelling.
If you were sedentary before pregnancy, this is still a safe time to start — just begin gradually. Walking is an excellent first step. If you were already active, you can generally continue your routine with pregnancy-specific modifications.
Choose activities you enjoy. Consistency matters more than intensity. Even 10-minute walks count toward your weekly goal.
The common thread: avoid activities with collision risk, fall risk, excessive heat, or pressure changes.
| Trimester | What to Know | Best Activities |
|---|---|---|
| First trimester (weeks 1–13) | Continue pre-pregnancy routine with modifications. Start if new to exercise. Nausea and fatigue may limit you — do what you can. | Walking, swimming, light strength training, prenatal yoga |
| Second trimester (weeks 14–27) | Often the easiest trimester for exercise. Avoid supine exercises. Shift balance training to seated or supported positions. | Walking, swimming, cycling, modified strength training, prenatal yoga, pelvic floor work |
| Third trimester (weeks 28–40) | Reduce intensity as needed. Focus on walking, stretching, pelvic floor, and mobility. Listen to your body — some days will be lighter. | Walking, swimming, gentle yoga, pelvic floor exercises, stretching, labor preparation exercises |
Moderate intensity means you are working hard enough to raise your heart rate and break a sweat, but you can still carry on a conversation. The "talk test" is the simplest and most reliable guide.
Heart rate targets that were once recommended (the old "keep your heart rate under 140 bpm" rule) are outdated and no longer used. Heart rate responses vary too much between individuals to be a useful universal target. Instead, focus on perceived exertion and the talk test.
Stay hydrated, avoid overheating, and do not exercise to exhaustion. Pregnancy increases your blood volume and metabolic rate, which means you overheat faster. Exercise in well-ventilated spaces, wear breathable clothing, and drink water before, during, and after activity.
Some days you will feel energized and strong. Other days, a gentle walk is all you can manage. Both are fine. Pregnancy is not the time to push through pain or fatigue to hit a target. Consistency over the weeks and months matters far more than any single workout.
These symptoms warrant immediate attention. Most are rare, but knowing them keeps you safe.
A well-rounded pregnancy fitness plan includes three components: cardiovascular exercise (walking, swimming, cycling), strength training (modified for pregnancy), and flexibility/pelvic floor work (prenatal yoga and pelvic floor exercises).
Aim for the 150-minute weekly target by breaking it into manageable chunks. Five 30-minute sessions, six 25-minute sessions, or even fifteen 10-minute walks all count. The best exercise plan is one you will actually follow.
If you have questions about specific medications or supplements that interact with your exercise routine, see our pregnancy-safe medications guide. And for the full picture of your pregnancy care, see our prenatal visit schedule — your provider can give personalized exercise guidance at any visit.
This guide is for informational purposes only and is not a substitute for professional medical advice. Always consult your healthcare provider with any questions about your pregnancy.
