Pregnancy Exercises to Avoid

Do you need your doctor's clearance before exercising in pregnancy?

Yes. Get clearance from your obstetrician or GP before you start or continue any training, and ask again if anything changes: bleeding, a placenta concern, high blood pressure, twins, or a diagnosis such as gestational diabetes. Every rule on this page sits under that clearance. A coach modifies exercises; only your doctor can tell you whether you should be exercising at all. Our prenatal and postnatal coaching works inside that clearance and never around it. The trimester guide covers what to do; this page covers what to leave out.

What should you avoid in each trimester?

The list shortens and then lengthens. In the first trimester the main limits are fatigue, nausea and heat. From the second trimester the physical rules arrive: no prolonged supine work, no balance-heavy or fall-risk movements, and lighter loads as the bump changes your centre of gravity. The third trimester adds comfort, breathlessness and pelvic pressure as reasons to shorten and simplify.

Two things are missing from most lists. First, the swap matters more than the ban: a woman who is told to stop squatting usually stops training altogether, while one who is shown a squat to a chair with a hand on the rack keeps going to 38 weeks. Second, the rules apply to what you already do, not only to a gym session. Carrying groceries up a walk-up HDB block, lifting a toddler, and the long standing stretch at a wedding dinner are all loads, and the same principles of exhaling, not straining and stopping for dizziness apply to them.

Why avoid lying on your back after 16-20 weeks?

From roughly 16-20 weeks the weight of the uterus can press on the large vein returning blood to your heart when you lie flat, which for some women causes dizziness, nausea or a drop in blood pressure. That is why ACOG and RCOG both advise against prolonged supine exercise after the first trimester. It does not mean you can never be on your back for a few seconds; it means floor presses, sit-ups and long supine stretches get swapped for an incline bench, a wedge, side-lying or standing versions. If you ever feel faint on your back, roll onto your left side and tell your coach and doctor.

Which activities carry a fall or contact risk?

• Contact and collision sports: football, basketball, netball, martial arts and boxing sparring.
• Fall-risk activities: cycling on the road, horse riding, skating, and anything on wet or uneven ground. Singapore's afternoon rain makes park paths slippery, so keep outdoor work to early mornings.
• Balance-heavy lifting: single-leg deadlifts and box jumps as your centre of gravity moves forward. Swap for split squats with a hand on a rack or wall.
• Jumping and impact: especially in the third trimester when the pelvic floor is already under load.
• Scuba diving and exercise at altitude: both are on every major guideline's avoid list.

Why does breath-holding matter?

Holding your breath and straining against a closed throat (the Valsalva manoeuvre) spikes pressure inside the abdomen and can raise blood pressure sharply. In pregnancy that pressure lands on a stretched abdominal wall and a loaded pelvic floor, and it can make you light-headed. The fix is simple: exhale on the effort, keep loads at a level you can talk through, and treat any doming or coning down the midline of your belly as a signal that the exercise is too much for now, not a reason to push harder.

How do you manage heat in Singapore?

Overheating is the one risk Singapore makes harder than the guidelines assume. HealthHub advises pregnant women to avoid getting overheated and to keep to conversational intensity, and that is difficult outdoors at 2pm in 33 degrees and 80 percent humidity. Practical rules: train in an air-conditioned living room or condo gym, or outdoors before 9am or after 6pm; drink before, during and after; skip hot yoga entirely; stop if you feel flushed, dizzy or stop sweating. If your condo gym is not air-conditioned, ask your coach to bring the session into your unit. See home and condo-gym training for how that works.

Which warning signs mean stop and call your doctor?

Stop exercising immediately and contact your obstetrician, or go to the KKH or your hospital's emergency department, if you notice any of the following. This list follows ACOG and RCOG guidance and is not exhaustive; if something worries you, that is enough reason to call.

• Vaginal bleeding or leakage of fluid
• Regular, painful contractions
• Chest pain or breathlessness before you have started exerting yourself
• Dizziness, faintness or a headache that does not settle
• Calf pain or swelling in one leg
• Muscle weakness affecting balance, or reduced baby movements

What is still safe for most pregnancies?

Quite a lot. With clearance, most women can keep walking, swimming at an ActiveSG or condo pool, doing supported strength work with dumbbells and bands, stationary cycling and prenatal-adapted mobility right through to the third trimester. Loads come down, positions change, and sessions get shorter, but the core habit continues. A typical second-trimester session at home looks like this: ten minutes of walking and mobility, three or four strength exercises at 2-3 sets of 10-12 with a load you can talk through, a few minutes of breathing and pelvic-floor work, and done inside 45 minutes. A coach who trains pregnant clients will know the swaps without you having to. If you would rather that coach were a woman, ask; see female personal trainer. And if you are unsure whether a specific exercise is fine for you, the answer is to ask your doctor, not to guess from a list.