Is It Safe to Lift Weights While Pregnant? Strength Training by Trimester
Short answer: for most healthy, uncomplicated pregnancies, yes. The American College of Obstetricians and Gynecologists (ACOG) and the 2019 Canadian guideline for physical activity throughout pregnancy both encourage strength training alongside aerobic exercise, aiming for about 150 minutes of moderate activity a week. Check with your OB or midwife first, adapt your training as your body changes, and stop if you notice any warning signs.
I'm Asia Rideout, a certified personal trainer and Pregnancy & Postpartum Athleticism coach in Alexandria, VA. I train moms through every trimester, and I'm a birth doula and student midwife too.
Why strength training helps during pregnancy
Research links regular exercise in pregnancy with benefits such as a lower risk of gestational diabetes and preeclampsia, less excessive weight gain, better mood and less back pain. Strength training specifically helps you:
Carry the growing weight of your baby with less back and hip pain
Keep the strength you'll need for birth recovery and daily lifting of a newborn
Stay confident in your body as it changes
How to adjust your training by trimester
First trimester
Keep training if you already lift. You may need to lower intensity on days when nausea or fatigue hit.
New to lifting? Start with bodyweight and light weights, and learn the basic patterns: squat, hinge, push, pull and carry.
Stay hydrated and avoid overheating.
Second trimester
Your center of gravity shifts, so favor stable positions and controlled tempos.
If lying flat on your back makes you dizzy, lightheaded or nauseous, switch to an incline bench or side-lying positions.
Watch for doming along your midline during core work and heavy lifts. It's feedback to adjust the load or your breathing.
Third trimester
Many moms keep lifting right up to birth, often with lighter loads, more reps and more rest.
Wider stances, split stances and supported variations become your friends.
Add breathing and pelvic floor relaxation work to prepare for birth.
Use the "talk test"
A simple way to judge effort: you should be able to hold a conversation during your workout. Breathe continuously through your lifts, and avoid holding your breath hard against heavy loads (the Valsalva maneuver) unless your provider has cleared it.
Warning signs: stop and call your provider
ACOG lists these reasons to stop exercising and seek care:
Vaginal bleeding
Abdominal pain
Regular painful contractions
Fluid leaking from the vagina
Shortness of breath before exercise
Dizziness or feeling faint
Headache
Chest pain
Muscle weakness affecting balance
Calf pain or swelling
Some conditions (for example certain heart or lung conditions, placenta previa later in pregnancy, or preeclampsia) mean exercise needs to be limited or avoided. That's why a conversation with your provider comes first.
Frequently asked questions
How heavy can I lift while pregnant?
There's no single number. It depends on your experience, how your pregnancy is going and how you feel. Experienced lifters often keep lifting moderately heavy with good technique; beginners should start light and progress slowly.
Can I start lifting if I've never done it before?
Yes, many women start during pregnancy. Begin with light loads and coaching on technique.
Is it safe to do ab exercises while pregnant?
Many core exercises are fine and helpful. Adjust or swap anything that causes doming, pain or pelvic pressure.
Train with a coach who specializes in pregnancy
At MotherMade Strong, 1:1 prenatal training is programmed trimester by trimester around your body and your goals. It starts with a free 45-minute assessment at One Way Performance, 5400 Eisenhower Ave, Suite A, Alexandria, VA.
Related: When Can I Start Exercising After Giving Birth? · Diastasis Recti: How to Check and What Actually Helps
Sources: ACOG Committee Opinion No. 804, "Physical Activity and Exercise During Pregnancy and the Postpartum Period" (2020); Mottola MF et al., "2019 Canadian guideline for physical activity throughout pregnancy," British Journal of Sports Medicine (2018); CDC, "Physical Activity for Healthy Pregnant or Postpartum Women."
This article is general education, not medical advice. Please check with your OB or midwife before starting or continuing exercise during pregnancy.
Written by Asia Rideout, Certified Personal Trainer, Certified Pregnancy & Postpartum Athleticism Coach and birth doula, founder of MotherMade Strong in Alexandria, VA.
