Aerobic Exercise in Pregnancy?

Aerobic exercise during pregnancy is one of the best things you can do for both yourself and your baby. Unless your healthcare provider has advised otherwise due to a medical condition or pregnancy complication, regular moderate-intensity aerobic exercise is considered safe and highly beneficial.

1. Improves Cardiovascular Health

Your heart works much harder during pregnancy. Aerobic exercise strengthens your heart and lungs, making everyday activities easier and helping your body adapt to the increased demands of pregnancy.

2. Boosts Energy Levels

Although it may seem counterintuitive, regular movement reduces fatigue by improving circulation and oxygen delivery throughout the body.

3. Reduces Pregnancy Discomforts

Regular aerobic exercise can help:

• Reduce back pain

• Ease pelvic discomfort

• Improve posture

• Reduce swelling in the legs and feet

• Decrease constipation by stimulating bowel function

  
  

4. Supports Healthy Weight Gain

Exercise helps you gain an appropriate amount of weight during pregnancy while maintaining muscle mass and overall fitness.

5. Lowers the Risk of Gestational Diabetes

Regular aerobic activity improves insulin sensitivity and helps regulate blood sugar levels, reducing the risk of developing gestational diabetes.

6. May Reduce the Risk of Pregnancy Complications

Research suggests that staying active may lower the risk of:

• High blood pressure during pregnancy

• Preeclampsia

• Excessive gestational weight gain

  
  

7. Improves Mood and Mental Health

Exercise stimulates the release of endorphins, helping reduce:

• Stress

• Anxiety

• Symptoms of depression

It can also improve confidence as your body changes.

8. Promotes Better Sleep

Many pregnant women struggle with sleep. Moderate aerobic exercise can improve sleep quality and help you fall asleep more easily.

9. Builds Stamina for Labour

Labour is often compared to an endurance event. Aerobic fitness improves endurance, helping you cope better with the physical demands of labour and delivery.

10. Supports Faster Postpartum Recovery

Women who remain active during pregnancy often find it easier to:

• Return to physical activity after birth

• Rebuild strength

• Regain cardiovascular fitness

• Feel more energetic during the postpartum period

  
  

11. Benefits Your Baby

Research suggests that babies of mothers who exercise during pregnancy may experience:

• Healthier birth weights

• Improved placental function

• Better cardiovascular health

• Potential benefits for brain development and long-term metabolic health

  
  

Safe Aerobic Activities During Pregnancy

Excellent options include:

• Walking

• Swimming

• Stationary cycling

• Low-impact aerobics

• Prenatal fitness classes

• Dancing (if balance is good)

• Water aerobics

• Elliptical training

  
  

How Much Exercise Is Recommended?

For most healthy pregnancies, aim for:

• 150 minutes of moderate-intensity aerobic exercise each week, spread over at least 3–5 days.

• You should be able to hold a conversation while exercising (the "talk test"), even if your breathing is noticeably increased.

  
  

Important Safety Tips

Stop exercising and contact your healthcare provider if you experience:

• Vaginal bleeding

• Leaking amniotic fluid

• Regular painful contractions

• Chest pain

• Severe shortness of breath

• Dizziness or fainting

• Persistent headache

• Calf pain or swelling

• Decreased fetal movement (after your provider has advised you on monitoring)

  
  

Remember to stay well hydrated, avoid overheating, wear supportive clothing and footwear, and listen to your body.

Pregnancy isn't the time to aim for peak athletic performance—it's a time to build and maintain fitness that supports a healthy pregnancy, prepares you for labour, and promotes a smoother recovery after birth.

References

American College of Obstetricians and Gynecologists. Physical Activity and Exercise During Pregnancy and the Postpartum Period. Committee Opinion No. 804 (reaffirmed 2023).

World Health Organization. WHO Guidelines on Physical Activity and Sedentary Behaviour (2020).

Mottola MF, Davenport MH, Ruchat SM, et al. 2019 Canadian Guideline for Physical Activity throughout Pregnancy. British Journal of Sports Medicine, 2018.

Davenport MH, Ruchat SM, Poitras VJ, et al. "Prenatal Exercise for the Prevention of Gestational Diabetes Mellitus and Hypertensive Disorders of Pregnancy: A Systematic Review and Meta-analysis." British Journal of Sports Medicine (2018).

Davenport MH, Meah VL, Ruchat SM, et al. "Impact of Prenatal Exercise on Maternal Harms, Labour and Delivery Outcomes: A Systematic Review and Meta-analysis." British Journal of Sports Medicine (2019).