Can You Run While Pregnant? A Guide to Safe Pregnancy Workouts

Complete Healthcare Team

If you were a runner before pregnancy, you can most likely keep running through it. That surprises a lot of people, because the old advice treated pregnancy as a reason to slow down and rest. The current guidance from major obstetric authorities points the other way: for most people with an uncomplicated pregnancy, staying active benefits both you and your baby and carries few risks. Running included.

The real question isn’t usually whether you can stay active, but how to do it safely as your body changes. That’s something the women’s care team at Complete Healthcare helps patients navigate throughout pregnancy, and the guidance below reflects what the evidence currently supports.

The Short Answer on Running

ACOG’s Committee Opinion 804 is clear that people who were already engaged in regular vigorous activity, including running, can continue throughout pregnancy in the absence of complications. Running and jogging appear on ACOG’s list of activities considered safe during pregnancy, and ACOG affirms that regular exercise during pregnancy benefits both you and your pregnancy with few risks.

There’s an important distinction, though. Pregnancy is generally not the time to take up running for the first time or to chase personal records. If you have an established running routine, continuing it with sensible modifications is well supported. If you didn’t run before, starting a brand-new high-impact program mid-pregnancy isn’t recommended, though you can absolutely begin a gentler routine and build from there. Either way, the first step is a conversation with your obstetric provider, because some conditions do make running or other exercise unsafe.

Why Staying Active During Pregnancy Is Worth It

The benefits of prenatal exercise are well-documented. Regular physical activity during pregnancy has been shown to:

• Support healthy weight gain within recommended ranges
• Reduce the risk of gestational diabetes and preeclampsia
• Ease common discomforts like back pain, constipation, and swelling
• Improve mood, energy, and sleep
• Build stamina and strength that can help with labor and recovery

These are meaningful, evidence-backed reasons, which is part of why the guidance shifted from “rest” to “keep moving” over the past few decades.

How Much and How Hard

ACOG and the U.S. Department of Health and Human Services recommend at least 150 minutes of moderate-intensity aerobic activity per week during pregnancy, which works out to about 20 to 30 minutes on most days.

For gauging intensity, the “talk test” is more useful than a heart rate number. At a moderate, safe intensity you should be able to hold a conversation but not sing. If you’re too winded to talk, ease off. This matters because the old hard heart-rate cutoffs (like the outdated 140 beats per minute rule) are no longer recommended, since heart rate naturally rises during pregnancy and varies widely from person to person.

Pregnancy Workouts That Are Generally Safe

ACOG identifies several activities as safe for most pregnancies:

• Walking, especially brisk walking, which gives a full-body workout that’s easy on the joints
• Swimming and water workouts, which support your weight and reduce joint strain
• Stationary cycling, which lowers the fall risk compared to a road bike
• Modified yoga and Pilates, avoiding positions flat on your back and deep twists
• Low-impact aerobics
• Strength training, with lighter weights and more repetitions
• Running and jogging, if it was part of your routine before pregnancy

Strength work deserves a special mention for runners. Building the glutes, hips, core, and pelvic floor helps with the added load and shifting center of gravity, and many people find it reduces the aches that come with later pregnancy.

Activities to Avoid

Some activities carry enough risk that ACOG recommends skipping them during pregnancy:

• Contact sports such as soccer, basketball, hockey, and boxing
• Activities with a high fall risk, including downhill skiing, off-road cycling, gymnastics, and horseback riding
• Scuba diving, which can be dangerous for the fetus
• Skydiving
• “Hot yoga” or “hot Pilates,” and any exercise that risks overheating
• Lying flat on your back for extended periods after about 20 weeks, since this can reduce blood flow

How to Adjust Running as Pregnancy Progresses

Running often changes across the trimesters, and that’s expected. As pregnancy advances, your center of gravity shifts, the hormone relaxin loosens your joints, and the energy cost of running rises. None of that is dangerous, but it does change how running feels. Practical adjustments many pregnant runners make:

• Shorten distances and slow the pace as needed
• Choose softer, flat surfaces and routes close to home and bathrooms
• Wear a supportive sports bra and consider a maternity support belt later on
• Stay well hydrated and avoid running in high heat or humidity
• Listen to your body and shift to walk-jog intervals or walking when running stops feeling comfortable, which for many people happens in the third trimester

There’s no universal week when you “have to” stop running. It’s individual, and comfort is a reasonable guide as long as you have no warning signs.

Warning Signs That Mean Stop and Call Your Provider

This is the part worth committing to memory. ACOG advises stopping exercise and contacting your obstetric provider if you experience:

• Vaginal bleeding
• Fluid leaking from the vagina
• Regular, painful contractions
• Chest pain
• Dizziness or feeling faint
• Headache that won’t go away
• Calf pain or swelling
• Shortness of breath before exertion
• Muscle weakness affecting balance

If any of these come up, stop and reach out. These are not symptoms to push through.

Common Questions About Exercising While Pregnant

Can running while pregnant cause a miscarriage?

For an uncomplicated pregnancy, there’s no good evidence that running or other moderate exercise causes miscarriage. Major obstetric guidance treats exercise, including running for those who already run, as safe and beneficial in the absence of specific medical reasons not to. That said, certain conditions are genuine contraindications, which is why individual clearance from your provider matters. If running ever causes pain, bleeding, or any of the warning signs above, stop and get checked.

Is it too late to start exercising if I’m already pregnant and wasn’t active before?

No. People who weren’t active before pregnancy can still start, and benefit. The key is to begin gradually, with low-impact activities like walking or swimming, and build up slowly rather than jumping into something intense. Check with your provider first, then start with a few minutes a day and add time as you feel able.

Do I need to keep my heart rate under a specific number?

Not anymore. The old advice to cap your heart rate at 140 beats per minute is outdated and no longer part of ACOG’s recommendations. Because heart rate rises naturally in pregnancy and differs from person to person, the talk test is the preferred way to keep intensity in a safe, moderate range.

When Exercise Isn’t Recommended

Honesty matters here. Exercise is safe for most pregnancies, but not all. Some conditions are absolute contraindications, including certain types of heart and lung disease, a cervical insufficiency or cerclage, being pregnant with multiples at risk of preterm labor, persistent bleeding, placenta previa after 26 weeks, and preeclampsia, among others. This is exactly why we encourage every patient to confirm their individual plan with their provider rather than assuming general guidance applies to them.

Let’s Build a Plan That Fits Your Pregnancy

If you’re wondering whether it’s safe to keep running, start a new routine, or adjust what you’re doing as your pregnancy progresses, that’s a conversation worth having with a provider who knows your history. Complete Healthcare offers women’s care with same-day appointments available across our 11 locations in Central Ohio, including Columbus, Pickerington, Newark, Lancaster, Marion, Marysville, and Delaware. Call us at 614-882-4343 or schedule online to get started.