For a healthy pregnancy with no complications, the American College of Obstetricians and Gynecologists (ACOG) and the CDC recommend at least 150 minutes of moderate-intensity aerobic activity each week — most commonly split as about 30 minutes on 5 days. Brisk walking counts, the minutes can be broken into smaller chunks, and if your pregnancy is normal, this activity does not increase your risk of miscarriage, low birth weight, or early delivery. This is education, not medical advice — always follow your own provider's guidance.
What exactly does ACOG recommend each week? #
ACOG recommends pregnant people aim for at least 150 minutes of moderate-intensity aerobic activity per week, the same target the CDC sets for pregnant and postpartum women. That's two and a half hours spread across the week, not crammed into one session.
This applies to people with uncomplicated pregnancies. If you have a condition like placenta previa, preeclampsia, certain heart or lung conditions, or are carrying multiples, your provider may adjust or limit activity. The 150-minute figure is a target to build toward, not a test you pass or fail — the CDC's reminder is that some physical activity is better than none.
How do I split 150 minutes across the week? #
The simplest split is 30 minutes on 5 days, but you can break it into shorter blocks — even 10-minute walks — and they still count toward your weekly total. The CDC notes that any amount of time counts toward meeting the aerobic guideline, so three 10-minute walks in a day add up the same as one 30-minute walk.
| Split style | What it looks like | Best for |
|---|---|---|
| 5 × 30 min | A 30-minute walk five days a week | A steady routine you can anchor to a daily habit |
| 6 × 25 min | Shorter walks, six days a week | Spreading load when one long walk feels like a lot |
| 3 × 10 min daily | Three short walks every day | Busy days, early fatigue, or nausea windows |
| 10 + 10 + 10 | Morning, lunch, evening | Desk jobs and broken-up time |
What counts as 'moderate intensity' in pregnancy? #
Moderate intensity means you're working hard enough to raise your heart rate and break a light sweat, but you can still talk in full sentences — you just couldn't sing. ACOG and Mayo Clinic both describe this as the talk test, and it's the safest way to gauge effort in pregnancy.
This is exactly why MaMile is built around effort, not pace. Heart-rate zones shift in pregnancy and a chest strap can mislead you, so we anchor to how the work feels — your own perceived effort, or RPE — paired with a quick talk-test check. No wearable required, no number to outrun.
What activities count toward the 150 minutes? #
Brisk walking is the most accessible option and the one most providers suggest first — it gives moderate aerobic conditioning with minimal stress on your joints, per Mayo Clinic. Swimming, stationary cycling, prenatal yoga, and low-impact aerobics also count.
| Generally safe in a healthy pregnancy | Activities to avoid |
|---|---|
| Brisk walking | Contact sports (soccer, basketball, ice hockey) |
| Swimming and water aerobics | High fall-risk activities (gymnastics, horseback riding, skiing, surfing) |
| Stationary cycling | Scuba diving and skydiving |
| Prenatal yoga (not hot yoga) | Hot yoga or hot Pilates (95–104°F rooms) |
| Low-impact aerobics | Exercise at altitudes above ~6,000 feet (if unaccustomed) |
What if I wasn't active before pregnancy? #
You don't start at 30 minutes — you build to it. ACOG's guidance for people new to exercise is to begin with as little as 5 minutes a day and add 5 minutes each week until you reach 30 minutes a day. Pregnancy is a fine time to start moving gently; it is not the time to chase a personal best.
If you're truly starting from zero, our guide to starting exercise in pregnancy when you were never active walks through this week by week. Some days you'll do less, and that's still a win.
Why does this much movement matter? #
Regular moderate activity in pregnancy is linked to lower rates of gestational diabetes, preeclampsia (high blood pressure), and cesarean delivery, according to Mayo Clinic. The CDC adds reduced risk of excessive weight gain and fewer symptoms of postpartum depression.
It also helps day to day: better mood, sleep, posture, and endurance for labor. None of this is about a body to get back to — it's about feeling steady inside the body you have now.
When should I stop and call my provider? #
Stop exercising and contact your provider if you notice any red-flag symptom — these are not signs to push through. ACOG lists specific warning signs to take seriously every single time.
For the full list and what each sign can mean, see pregnancy exercise warning signs: when to stop. And if walking is uncomfortable because of pelvic pain rather than a red flag, our guide to walking with pelvic girdle pain covers how to keep moving comfortably.
This article is part of MaMile's complete guide to pregnancy movement. For how walking changes across pregnancy, see our trimester-by-trimester walking guide.
Is 150 minutes a week a strict rule?
No — it's a target to build toward, not a pass/fail line. ACOG and the CDC recommend at least 150 minutes of moderate activity weekly in a healthy pregnancy, but the CDC is clear that some activity is better than none. Do what your week and your body allow.
Can I do all 150 minutes in one or two long sessions?
You can, but spreading it out is gentler and easier to sustain. The CDC says any block of time counts, so 30 minutes on five days — or even 10-minute walks throughout the day — adds up the same as a couple of long workouts.
How do I know I'm not exercising too hard?
Use the talk test: if you can hold a conversation in full sentences but couldn't comfortably sing, you're at moderate intensity. If you're gasping between words, ease back. This effort-based check is more reliable in pregnancy than a heart-rate number.
I was sedentary before — is it too late to start?
No. ACOG advises starting with as little as 5 minutes a day and adding about 5 minutes each week until you reach 30 minutes. Beginning gentle activity in a healthy pregnancy is encouraged; just clear it with your provider first.
Does exercising raise my risk of miscarriage?
For a healthy, uncomplicated pregnancy, moderate activity like brisk walking does not increase the risk of miscarriage, low birth weight, or early delivery, per ACOG. If you have a high-risk pregnancy, follow your provider's specific guidance.