She is 38 weeks pregnant and still closing her step rings while the entire waiting room silently wills her to sit down. Your instinct is to join them, or to swing the other way and cheer her toward a personal best. Both instincts are wrong, combatant. Exercising in the third trimester is safe and genuinely good for an uncomplicated pregnancy, and your job is neither to bench her nor to push her. It is to be her support crew: hydrated, informed, and watching the signals she is too determined to notice herself.
Here is your briefing. Your partner is a Power Walker Wombie: turned by the supply drop, fitness watch charged, determined to keep moving right up to the Package's deployment. She is the operator; you are support crew and safety officer. Here is how you keep her going, safely, to the finish.
- Target profile: how to identify a Power Walker Wombie
- The intel: staying active is safe, and the science backs her
- Cleared for deployment? When she needs the doctor's sign-off first
- Your orders, combatant: support crew, not coach
- Safe manoeuvres versus off-limits activities
- Modify as you advance: adjusting exercise in the third trimester
- Abort signals: warning signs to stop
- Mission success: what winning looks like
Target profile: how to identify a Power Walker Wombie
You will know her by the watch, the water bottle, and the quiet refusal to be told to rest. At an age of pregnancy when most people have parked themselves on the couch, she is still lacing up, and being told to "take it easy" only makes her lace up faster.
Here is the good news to lead with: she is not being reckless. The evidence is on her side, and the smart move is not to talk her out of it. It is to become the support crew who keeps her going the right way, by knowing the science, the modifications and the stop signs better than she does.
The intel: staying active is safe, and the science backs her
Start with the permission, because she is probably tired of being doubted. For an uncomplicated pregnancy, regular activity is not just safe, it is recommended. Australia's Pregnancy, Birth & Baby and the Australian Government physical activity guidelines both back staying active throughout pregnancy.
The benefits are real and worth knowing. Regular activity lowers the risk of gestational diabetes and pre-eclampsia, eases back and pelvic pain, helps with bladder control, lifts mood and sleep, reduces the raised clotting (DVT) risk that comes with a sedentary pregnancy, and helps prepare her body for the endurance event of birth and the recovery after. Crucially, in an uncomplicated pregnancy it does not increase the risk of miscarriage, preterm birth or low birth weight. That is the myth that benches people, and it is wrong.
One framing rule for you, and it matters: this is about strength, stamina and feeling good, never about weight or "getting her body back." Pregnancy is not the time for that goal, and it is not the point. She is training for a marathon, not a photo.
Cleared for deployment? When she needs the doctor's sign-off first
Most pregnancies get the green light, but not all, and this is where determination has to yield to clearance. Some situations mean checking with the doctor before she exercises, or modifying what she does.
According to RANZCOG, certain conditions need medical guidance first, including a complicated pregnancy such as placenta praevia, vaginal bleeding, pre-eclampsia, or a history of preterm labour. If any of these are in play, her drive to keep training does not override the sign-off. Your job is to back that check, not help her skip it.
Your orders, combatant: support crew, not coach
Get the role right and everything else follows. You are not her personal trainer chasing a PB, and you are not the nervous voice telling her to stop. You are the crew in the pit lane.
Your standing jobs:
- Keep her hydrated. Water before, during and after. Have the bottle ready before she asks.
- Manage the heat. No hard exercise in extreme heat or humidity, and no overheating. Cool room, loose clothing, sensible timing.
- Know the abort signals cold (the list is below), because she will be concentrating and you are the second set of eyes.
- Back the modifications without making them a fuss. When she shifts to something gentler, treat it as smart tactics, not a step down.
That is the whole role: make it easy for her to keep going safely, and be the one paying attention when she is in the zone.
Safe manoeuvres versus off-limits activities
Here is the practical split. Keep it simple and skimmable.
Cleared for action:
- Walking
- Swimming and water-based classes, where the water carries her weight
- Stationary cycling
- Low-impact aerobics
- Prenatal yoga and Pilates
- Modified strength work
- Pelvic floor exercises
Off-limits:
- Contact sports and anything with a fall or collision risk: skiing, horse riding, off-road cycling, gymnastics, surfing
- Lying flat on her back for long stretches after about 16 weeks
- Overheating: hot yoga, or hard exercise in extreme heat or humidity
- Scuba diving
- Heavy lifting and high loads
- High-impact jumping or bouncing that loads the pelvic floor
For intensity, use the talk test: if she can still hold a conversation she is in the right zone; if she cannot get a sentence out, ease off. And short sessions through the day count as much as one long one, useful ammunition when someone says she is "overdoing it."
Modify as you advance: adjusting exercise in the third trimester
The third trimester is where the smart modifications earn their keep, and where your support matters most. Three things are changing at once.
Her ligaments are looser, which makes joints more mobile and easier to injure. Her centre of gravity has shifted forward, which makes her less stable and more prone to a fall. And the growing load on her joints means weight-supported options, like the pool or the stationary bike, start to feel much better than they used to. RANZCOG advises avoiding prolonged exercise lying on her back after about 16 weeks, since that position can reduce blood flow; swap those moves to her side, seated, or standing.
The headline for both of you: she may need to do less as she goes, and that is not failure. It is good tactics. Trading the long run for a swim is not slowing down; it is adapting the training to the terrain.
Abort signals: warning signs to stop
This is the section you learn by heart, and there are no jokes in it. If any of these appear during or after exercise, she stops and gets medical advice. This list follows Pregnancy, Birth & Baby.
Stop exercising and seek medical advice if she has any of these:
- Dizziness or faintness
- Shortness of breath before exertion, or out of proportion to it
- Chest pain
- Headache
- Vaginal bleeding
- Fluid leaking
- Regular, painful contractions
- Abdominal or back pain
- Calf pain or swelling
When in doubt, stop and call the midwife or doctor. Calf pain or swelling in particular should be checked promptly, as it can signal a clot.
Your part is simple: know this list, watch for it, and be the one who calls it. If something here shows up mid-stride, "let's stop and ring the midwife" is the most useful sentence you own.
Mission success: what winning looks like
Winning is not a step-count record or a finish-line photo. It never was.
Mission success is this: she stayed active in the way that was right for her body, she was hydrated and never overheated, the modifications happened without a fight, and if a warning sign had appeared, you would both have known it and acted. She kept moving on her terms, backed by the evidence and by you, right up to the day the Package deployed.
She was right to keep going. You made sure she could do it safely. That is the mission.
Two quick handovers. "Walking to actually get things moving" is a different operation, and it belongs to the Get This Baby Out dossier. Getting back to training after the birth is its own campaign, and one to start only when her care team says she is ready. And keeping her watered on the move overlaps with the Snack Commander's supply line.
And the kit for all that moving, the water bottle, the supportive sports bra, the belly support band for late on? Already handled. The supply drop arrives sorted, so that is one less thing to organise before the next lap.
This post is general information for expecting parents and their support partners, not medical advice. Always check with your doctor or midwife before starting or continuing exercise in pregnancy, and stop and seek advice if any warning sign appears.