You do not have to pick between breastfeeding and getting your core back
What the official guidance actually says about training while you are still feeding, and how to choose a program that fits around cluster feeds and broken sleep.
Quick answer
For most mums, yes, it is worth starting. Breastfeeding does not put your abdominal wall or pelvic floor on hold, and the American College of Obstetricians and Gynecologists advises that moderate exercise while breastfeeding does not reduce the amount or the quality of your milk. Once your GP or midwife has signed off at your postnatal check, gentle deep-core and breathing work can run happily alongside feeding. The bigger risk is the opposite one: waiting until you wean can mean waiting a year or more, and research shows an abdominal gap left alone does not reliably close on its own.
The usual point of the postnatal check, when most mums are cleared to build activity back up (NHS; ACOG).
Of mums still had diastasis recti at 12 months postpartum, long after many have weaned (Sperstad et al., British Journal of Sports Medicine, 2016).
What a single one-time Mumma Glow guide costs, with no monthly renewal to cancel later.
Why so many feeding mums ask this
The worry is nearly always one of three things. Some mums have heard that exercise sours milk or drops supply. Some are so flattened by night feeds that any workout feels reckless. And some have been told, often casually, to "wait until you have finished feeding" before doing anything about the belly gap or the leaking.
Only one of those three is really about the milk. The other two are about energy and timing, and they have practical answers rather than medical ones.
What the guidance actually says about exercising while breastfeeding
ACOG's guidance on physical activity in the postpartum period is direct: exercise does not adversely affect the volume or composition of breast milk, and it is not a reason to stop or delay activity. The NHS gives the same practical message, encouraging new mums to build gentle activity back in once they feel ready and their postnatal check is done.
What none of them recommend is going from nothing to high-impact. That is a separate issue, and it applies whether you are feeding or not. The sensible sequence, breathing and deep-core work first, then loading, then impact, is the same for everyone. We break it down in our guide to when it is safe to start working out again after giving birth.
If your specific concern is supply rather than safety, we have looked at the evidence in detail in does exercise affect your milk supply.
Does waiting until you wean make it easier?
This is the assumption worth challenging. There is a real, natural improvement in the months after birth as your tissues recover, and plenty of mums do see their gap narrow without doing anything targeted. But it plateaus, and it does not reach everyone.
The most cited figures come from Sperstad and colleagues, who followed first-time mums through the first year. The share with diastasis recti fell steadily, then stalled with roughly a third still affected at 12 months.
60%
45.5%
32.6%
Source: Sperstad et al., British Journal of Sports Medicine, 2016.
Read that honestly and it cuts both ways. Roughly two thirds of mums are no longer affected by the one-year mark, which is genuinely reassuring. But for the remaining third, time alone was not the answer, and many of them are still feeding at that point. If you are eight or ten months in and nothing has shifted, another six months of waiting is unlikely to be the missing ingredient. A quick at-home self-test will tell you far more than the calendar will.
What breastfeeding does change about your training
Feeding does not change the exercises. It changes the logistics and the fuel, and pretending otherwise helps nobody.
Comfort comes first
A full chest and any face-down or high-impact work are a poor match. Most mums find training just after a feed far more comfortable, and a properly fitted, supportive bra matters more than it did before.
Your energy ceiling is genuinely lower
Milk production has a real metabolic cost on top of broken sleep. This is the strongest argument for short, repeatable sessions rather than ambitious hour-long plans you will abandon by week two. Our piece on beating new-mum fatigue without more coffee covers the practical side, and what to eat while breastfeeding for more energy covers the fuel.
Your schedule is not your own
Any program that assumes a fixed 45-minute slot at the same time each day is going to lose to a cluster-feeding evening. Something you can pause mid-set and pick up again is worth more than something perfectly periodised.
What to look for in a program while you are feeding
Once you accept that consistency is the constraint rather than intensity, the features that matter change quite a lot.
| Feature | Why it matters while feeding | What to look for |
|---|---|---|
| Session length | Long sessions get abandoned, not shortened | 10 to 20 minutes, finishable in one go |
| Starting point | Deep-core and breathing work is what rebuilds function | Begins with breathing and transverse abdominis, not crunches |
| Payment model | A subscription keeps charging through the months you are too tired to open it | One-time purchase, or a subscription you can genuinely pause |
| Equipment | Nothing that needs setting up while holding a baby | Floor-based, no equipment required |
| Format | Video-only plans are hard to follow one-handed at 2am | Written guidance you can skim, screenshot and re-read |
| Pelvic floor included | Core and pelvic floor recover as one system | Both trained together, not sold separately |
That last point is not a technicality. The deep core and the pelvic floor work as a single pressure system, which is why programs that treat them separately tend to stall. We explain the mechanism in pelvic floor and diastasis recti: are they connected.
A gentle place to start while you are still feeding
Core Reconnect is a one-time digital guide built around short, floor-based deep-core sessions you can do while the baby naps, with no equipment and no subscription running in the background. Use code GLOW20 for 20% off.
So who should start now, and who should wait?
The honest verdict
Start now if you have had your postnatal check, you feel physically ready, and you can commit to 10 to 15 minutes most days. Feeding is not a reason to postpone breathing work, deep-core activation or pelvic floor training, and starting early tends to mean better habits rather than faster miracles.
Wait, or see someone first, if you have pain, heavy or worsening leaking, a dragging or bulging sensation in the vagina, unexplained bleeding, or a scar that still feels raw. Those are signs to see your GP, midwife or a women's health physiotherapist before starting anything, feeding or not.
Results vary from mum to mum. Some see change in weeks, some need months and some need hands-on physiotherapy alongside a home program. None of those outcomes is a personal failing.
If you are weighing up whether any paid plan is worth it at all, our honest look at whether postpartum core programs actually work and our breakdown of what it costs to fix diastasis recti are the two most useful next reads.
Frequently asked questions
Will exercising while breastfeeding reduce my milk supply?
According to ACOG, moderate exercise does not adversely affect the quantity or composition of breast milk. Supply is far more sensitive to how often milk is removed, plus hydration and overall food intake, than to whether you did a core session that morning.
Does breast milk taste different after a workout?
Older research raised the possibility of a temporary rise in lactic acid after maximal-intensity exercise, and some babies were reported to feed less enthusiastically straight afterwards. This is not something typically seen with the moderate, gentle work involved in postpartum core rebuilding, and feeding before you train sidesteps it entirely.
Can I do core work if my postnatal check has not happened yet?
Gentle diaphragmatic breathing is usually the exception, and many midwives encourage it from early on, but check with your own care provider first. Structured core and pelvic floor programs are best started after you have been cleared, and later again after a caesarean.
Should I wait until I have weaned to see if the gap closes by itself?
Some improvement does happen naturally, but the Sperstad data suggests it plateaus, with about a third of mums still affected at 12 months. If your gap has not changed for several months, more waiting is unlikely to be what changes it.
Is a subscription program a bad idea while breastfeeding?
Not inherently, and some are excellent. The practical issue is that the early feeding months are exactly when you are most likely to miss weeks, and a monthly charge keeps running through them. If you choose a subscription, check how easily it pauses before you sign up.
Sources: American College of Obstetricians and Gynecologists (physical activity and exercise during pregnancy and the postpartum period); NHS (keeping fit and healthy with a baby); Sperstad JB et al., British Journal of Sports Medicine, 2016.
This article is general education and not medical advice. Mumma Glow is not affiliated with any program or brand named here. Results vary from mum to mum. Please see your GP, midwife or a women's health physiotherapist before starting or changing an exercise program, particularly if you have pain, leaking, a caesarean scar or any symptoms that concern you.