10 Ab Exercises to Avoid During Pregnancy and Safe Alternatives

Your core supports your spine, posture, and growing bump, but not every crunch belongs in a prenatal routine. Knowing the right ab exercises to avoid during pregnancy helps you stay active without extra pressure on your midline, pelvis, or blood flow. This guide lists ten common moves to skip and practical safe pregnancy exercises you can swap in instead.

Always check with your gynaecologist or physiotherapist before starting or changing workouts, especially if you have placenta previa, cervical issues, bleeding, or severe nausea. The tips below are general education, not personal medical advice. When you train at home, wear breathable maternity leggings and denims and supportive layers from maternity wear on The Mom Store so movement feels easy, not restrictive.

Why some ab work is risky while pregnant

As your bump grows, heavy crunching, long planks, and twisting can stress your midline and lower back. Lying flat after the first trimester may cause dizziness for some women. Trainers favour gentle pregnancy core exercises that build stability, not maximum burn.

Quick reference: avoid vs try instead

10 moves to skip (and what to do instead)

1. Crunches and sit-ups

These spike midline pressure and rank high among ab exercises to avoid during pregnancy after the first trimester.

Try instead: Seated belly breathing, inhale wide, exhale and gently draw your belly in. A top safe pregnancy exercise for any trimester.

2. Bicycle crunches

Fast twisting plus flexion stresses your midline.

Try instead: Side-lying clamshells for hip and pelvic stability.

3. Long full planks

Long floor holds raise intra-abdominal pressure. Stop if you see coning along your abs.

Try instead: Short incline plank on a wall or counter for 10–20 seconds.

4. Russian twists

Feet-up rotation overloads obliques for many pregnant bodies.

Try instead: Seated pelvic tilts on a chair, no shoulder twist.

5. Lying flat leg raises

Back-lying leg lifts can cause dizziness later in pregnancy.

Try instead: Heel slides on all fours, controlled pregnancy core exercises.

6. Standing toe touches

Bouncing toe touches round the spine and compress your bump.

Try instead: Soft hip hinge or cat-cow on all fours.

7. V-ups

Too aggressive for most prenatal stages.

Try instead: Bird-dog, opposite arm and leg reach on hands and knees.

8. Ab wheel rollouts

Deep extension under load, skip until postpartum clearance.

Try instead: Wall push-ups or chair sit-to-stand.

9. Mountain climbers

High-impact core cardio stresses wrists and pelvis.

Try instead: March in place or walk in comfy maternity regular pants.

10. Weighted sit-up twists

Flexion plus rotation worsens midline doming.

Try instead: Supported chair squats, stop if you feel strain.

When to stop and call your doctor

Seek advice for bleeding, fluid leak, painful contractions, chest pain, severe headache, or sudden dizziness. A ridge down your midline may signal diastasis recti during pregnancy, ask a physiotherapist before progressing core work.

Trimester tips and comfort gear

First trimester: Lighter intensity if your doctor agrees; still skip hard crunches if new to training.

Second trimester: Favour seated, standing, and side-lying moves over long back-lying work.

Third trimester: Prioritise walking and breathing. Rest with a G-shaped pregnancy pillow between active days.

Layer maternity and nursing tops with over belly support panties. Soothe stretching skin with anti-stretch mark body oils or pregnancy skin care. After delivery, ask before using postpartum accessories.

Simple weekly plan

Aim for daily walks plus two short strength sessions using the swaps above. Shop maternity co-ord sets and maternity nightwear for easy movement and rest.

Closing

Safe motherhood starts with smart movement, not the hardest ab burn. Keep this list handy, swap in gentler options, and wear comfortable maternity gear from The Mom Store. When in doubt, ask your doctor.