Exercise after giving birth: when you can start after a vaginal birth or a C-section, a plan for the first 12 weeks, and the signs to stop

After a straightforward vaginal birth you can start gentle exercise after giving birth within days, with short walks and pelvic floor squeezes. Singapore's physical activity guidelines for postpartum women say to ease back in gradually, building towards at least 150 minutes a week of moderate activity, the pace where you can talk in short sentences but can't sing. After a C-section, an assisted birth or a complicated delivery, wait for your doctor's go-ahead at the four-to-six-week check before anything beyond walking and pelvic floor work; KKH says nothing heavy for two months after a caesarean. Running, jumping and heavy weights wait until at least 3 months, the NHS says. Below: when to start by type of birth, a 12-week plan, how hard to push, and the signs that mean stop.

When can you start? Vaginal birth versus C-section

Timings vary with how the birth went, so treat these as the earliest point, not a target. They come from Families for Life, the government's family portal, which says to wait for the four-to-six-week check after a C-section, an assisted birth or complications; from KKH, NUH and SGH; and from the NHS and the postnatal exercise leaflet of Gloucestershire Hospitals NHS Trust.

A simple plan for the first 12 weeks

This plan follows the two stages in the Gloucestershire leaflet: deep muscles first, then the bigger muscles once the first stage feels easy. Move to the next row only when the current one feels comfortable; for some mums that takes longer, and that's fine.

Walking counts. The NHS suggests pushing the pram briskly with your back straight, and taking the stairs instead of the lift. If you're breastfeeding and overweight, it says a brisk 30-minute walk a day alongside a balanced diet won't affect your milk. If weight is your goal, our guide to losing weight after giving birth sets a realistic pace.

How hard to push: Singapore's guidelines

Singapore's physical activity guidelines for pregnant and postpartum women, published on HealthHub, set the target you're building back to: at least 150 minutes of moderate aerobic activity a week, some muscle strengthening, and less time sitting, especially in front of a screen. They use a talk test to judge effort, so you don't need a heart rate monitor.

• Start small and build up gradually; the guidelines say doing some activity is better than none.
• The guidelines advise postpartum women to avoid vigorous activity, unless you were already doing vigorous exercise before and through pregnancy, in which case you can carry on and adjust to how your body feels.
• Core strengthening and pelvic floor training, done regularly, strengthen your trunk and reduce the risk of leaking urine.
• Avoid excessive heat, contact sports and anything with a high risk of falling.
• The guidelines also note that physical activity may reduce postpartum depression, so a daily walk helps your mood as well as your fitness.

Check your tummy gap before sit-ups

Your stomach muscles stretch in pregnancy, and the tissue joining the two halves can widen. The Gloucestershire leaflet lists the signs: bulging or doming down the middle of your tummy when you sit up, aching along the middle, a gap you can feel when you press in, poor posture and low back pain. The NHS advises avoiding sit-ups, planks and high-impact exercise to start with, and straining on the toilet. If you notice doming, ask your doctor to refer you to a women's health physiotherapist.

The NHS says the gap is usually about 2 finger widths in pregnancy and normally closes by the time your baby is 8 weeks old. You can check it yourself:

1. Lie on your back with your knees bent and feet flat on the floor.
2. Lift your shoulders slightly off the floor and look down at your tummy.
3. With your fingertips, feel between the edges of the muscles above and below your belly button, and count how many fingers fit in the gap.
4. Repeat every week or two; the gap should keep getting smaller.

If the gap is still obvious 8 weeks after the birth, or you see a ridge or doming when you sit up, the NHS says to see your GP, who can refer you to a physiotherapist. Deep tummy and pelvic floor exercises help it close; sit-ups, planks and heavy lifting wait.

Warning signs that mean you should stop

Leaks and heaviness point to the pelvic floor; our guides to leaking urine after pregnancy and postpartum pelvic floor recovery cover what helps.

Women's health physiotherapy in Singapore

A women's health physiotherapist checks your pelvic floor and tummy gap and builds a programme around them. It's the step most worth taking before running or high-impact classes, especially if you leak, feel heaviness, or had a forceps birth or a bad tear.

For subsidised rates at a public hospital, ask your polyclinic doctor or O&G for a referral; KKH, for example, charges subsidised rates for specialist visits only on referral from a polyclinic, a public hospital or a CHAS GP.

What happens at a physio visit

KKH's physiotherapists start with an individual assessment, then treat according to what they find. For leaks and pelvic floor problems, KKH lists pelvic floor exercises and bladder retraining, plus electrical stimulation if needed. Perineal pain and swelling after the birth can be eased with ice therapy or ultrasound, and they can fit a maternity support belt if you need one. KKH also runs outpatient group classes: a pre and postnatal fitball class, and baby massage for babies from 1 to 12 months old. Fees at private clinics are set by each clinic, so ask what the first assessment costs when you book.

Where to exercise in Singapore

• KKH runs postnatal exercise classes at the hospital on weekends; call its Patient Education Centre on 6394 1268.
• SGH's physiotherapists teach pelvic floor exercises on the ward, and its Postnatal Assessment Service follows up mums who had a forceps birth or a serious tear.
• Postnatal yoga and Pilates classes suit the six-to-twelve-week stage; our guides to postnatal yoga and postnatal Pilates explain what to ask a studio.
• If you join a regular gym class, tell the instructor you've recently had a baby, as the NHS advises.

Exercising in Singapore's heat

• Walk early in the morning or after sunset, or do laps of an air-conditioned mall with the pram.
• Drink before and after, more if you're breastfeeding; HealthHub's postpartum guide encourages breastfeeding mums to drink about 12 glasses a day.
• Feed or express before a workout so your breasts are comfortable, and wear a supportive bra.
• Stop if you feel dizzy, faint or unusually breathless, and rest in the shade or indoors.

Two buys worth making: a sports bra fitted for your new size, since the NHS says your back and cup size have probably changed, and shoes that fit, because your feet may have changed too. Our guide to nursing clothes covers sports bras you can feed in.

Frequently asked questions

When can I start exercising after giving birth?

After a straightforward birth, gentle walking, stretches and pelvic floor exercises can start as soon as you feel up to it, the NHS says. Get advice at your six-week check before high-impact exercise.

When can I exercise after a C-section?

Walking and pelvic floor exercises start the day after surgery. KKH says no heavy lifting for at least two months, and running or heavy weights wait until at least 3 months.

When can I go swimming after giving birth?

The NHS says to wait until 7 days after your postnatal bleeding has stopped, and after a C-section until the wound has healed too.

Can I do sit-ups after giving birth?

Not at first. The NHS advises avoiding sit-ups, planks and high-impact exercise to start with. Begin with deep tummy and pelvic floor exercises, and check for doming down the middle of your tummy.

Does exercise affect breast milk?

Moderate exercise doesn't. The NHS says a brisk 30-minute daily walk with a balanced diet won't affect the quality or quantity of your milk.

When can I start running after having a baby?

Not before 3 months, and only when nothing hurts or leaks. If you leak or feel heaviness when you run, see a women's health physiotherapist.