Women’s Health — all lessons

Third trimester: strengthening and stretching

Exercise in the third trimester (weeks 28–40) — reducing load, comfort, balance, pelvic floor relaxation and labour-preparation positions.

Advanced Evidence: Strong evidence 3 min read Reviewed 2026-10-31 Status: draft

Learning objectives

  • Describe common changes in the third trimester
  • Select and modify strengthening exercises
  • Apply safe stretching and mobility
  • Recognise warning signs

Before this lesson

Why this matters

Each stage of pregnancy brings different symptoms and needs. Tailoring sessions keeps exercise comfortable and safe.

What changes

Weeks 28–40: larger bump, reduced balance, breathlessness, possible pelvic girdle pain.

Priorities

  • Reduce loads and impact; focus on comfort and function
  • Wider stance, supported exercises, avoid high fall risk
  • Practise pelvic floor relaxation and breathing
  • Modify for pelvic girdle pain (avoid wide asymmetrical stances)

Regular activity until delivery is recommended for uncomplicated pregnancies [mottola2018]. Daily pelvic floor training helps prevent incontinence [woodley2020].

Example session (45 min)

BlockExercises
Warm-upWalking or cycling 8 min; mobility
StrengthGoblet squat to box, hip hinge (dumbbell RDL), seated row, incline press, side-lying clams
Pelvic floorContractions and full relaxation with breathing
Cool-downGentle stretches within comfortable range

Intensity: RPE ~12–14/20, talk test [acog2020].

Common mistakes and misconceptions

Case study

A client in the third trimester trains three times weekly with the session above, adjusting loads to comfort. She remains active and confident through this stage.

Further learning: video lessons

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Knowledge check

Knowledge check · 0/5

1. The third trimester spans roughly…

Answer C. Final third.

2. A priority in the third trimester is…

Answer B. Labour preparation.

3. With pelvic girdle pain, avoid…

Answer A. Reduce asymmetric shear.

4. Balance worsens because…

Answer A. Fall risk.

5. Exercise in late uncomplicated pregnancy is…

Answer B. Guideline.

Short-answer & application questions

  1. Design a session for the third trimester.
  2. List modifications for common symptoms.
  3. Explain warning signs to a client.

Key takeaways

  • Weeks 28–40: larger bump, reduced balance, breathlessness, possible pelvic girdle pain.
  • Reduce loads and impact; focus on comfort and function
  • Wider stance, supported exercises, avoid high fall risk
  • Practise pelvic floor relaxation and breathing

Connected topics

References

  1. Mottola MF, Davenport MH, Ruchat SM, et al. (2018). 2019 Canadian guideline for physical activity throughout pregnancy. British Journal of Sports Medicine, 52(21):1339–1346. doi:10.1136/bjsports-2018-100056 Guideline check pending
  2. American College of Obstetricians and Gynecologists (2020). Physical activity and exercise during pregnancy and the postpartum period: ACOG Committee Opinion No. 804. Obstetrics & Gynecology, 135(4):e178–e188. Guideline check pending
  3. Woodley SJ, Lawrenson P, Boyle R, et al. (2020). Pelvic floor muscle training for preventing and treating urinary and faecal incontinence in antenatal and postnatal women. Cochrane Database of Systematic Reviews, CD007471. Systematic review check pending

Educational content only — not medical advice. Consult a qualified clinician for diagnosis or treatment.