Pregnancy Exercise — Contraindications & Warning Signs
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ACOG lists absolute contraindications (do not do aerobic exercise) and relative contraindications (exercise only with clinician guidance), plus warning signs that mean stop and seek care.
Detail
Per ACOG Committee Opinion 804 (2020):
Absolute contraindications to aerobic exercise (aerobic exercise is not recommended; individualized medical guidance required):
- Hemodynamically significant heart disease
- Restrictive lung disease
- Incompetent cervix or cerclage
- Multiple gestation at risk of premature labor
- Persistent second- or third-trimester bleeding
- Placenta previa after 26 weeks of gestation
- Premature labor during the current pregnancy
- Ruptured membranes
- Preeclampsia or pregnancy-induced hypertension
- Severe anemia
Relative contraindications (discuss risks/benefits with the obstetric provider before exercising):
- Anemia
- Unevaluated maternal cardiac arrhythmia
- Chronic bronchitis
- Poorly controlled type 1 diabetes
- Extreme morbid obesity
- Extreme underweight (BMI < 12)
- History of extremely sedentary lifestyle
- Intrauterine growth restriction in current pregnancy
- Poorly controlled hypertension
- Orthopedic limitations
- Poorly controlled seizure disorder
- Poorly controlled hyperthyroidism
- Heavy smoker
Warning signs to stop exercise and seek obstetric care:
- Vaginal bleeding
- Regular painful contractions
- Amniotic fluid leakage
- Dyspnea (shortness of breath) before exertion
- Dizziness
- Headache
- Chest pain
- Muscle weakness affecting balance
- Calf pain or swelling (possible thrombosis)
Non-medical-advice disclaimer
Educational only. This list does not replace obstetric assessment. Any pregnant person should follow their provider's individualized guidance.
Key facts
- Absolute contraindications include significant heart/lung disease, persistent bleeding, placenta previa after 26 wk, ruptured membranes, preeclampsia, severe anemia, premature labor, incompetent cervix.
- Relative contraindications require provider discussion (e.g., poorly controlled diabetes/HTN/seizures, IUGR, anemia, extreme BMI).
- Stop and seek care for: bleeding, fluid leak, regular painful contractions, chest pain, dyspnea, dizziness, headache, calf pain/swelling.
Connections
- pregnancy — the main prenatal exercise prescription.
- postpartum — return after delivery.
- medical-clearance-screening — clearance framing.
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.