Most women benefit from waiting at least 12 weeks before returning to running, even after a six-week all-clear. Here is what the evidence actually says.
The short answer on postpartum running when to start
If you are Googling "postpartum running when to start" while the baby naps, here is the honest answer: most women benefit from waiting at least 12 weeks after birth before reintroducing running, even if they get the all-clear at their six-week check. The all-clear is a milestone, not a finish line. It typically means your tissues are healing on track, not that your pelvic floor and abdominal wall are ready to absorb the repetitive load of running. The first evidence-based guidelines for returning to running postpartum were only published in March 2019 by three UK physiotherapists, so if your mum's friend told you she ran a 5K at eight weeks postpartum and felt fine, that is her story, not a benchmark for you.
Running is high-impact. Every footstrike sends a shockwave through a pelvic floor and core that have just spent nine months carrying, then delivering, a baby. Rushing that return is one of the more common ways new mums end up with symptoms they assume are just part of being postpartum: leaking when they cough, a heaviness that lingers, pelvic pain that flares after a run.
Why your body needs time before you run
After having a baby, your abdominal wall and pelvic floor muscles are stretched, weak, and may still be recovering from giving birth. That is not a personal failure. It is what the tissue goes through, whether you had a vaginal birth or a caesarean. The pelvic floor in particular acts like a built-in suspension system for your pelvic organs, and during pregnancy and birth it has been loaded, stretched, and in some cases torn.
Running asks a lot of that suspension system. Each step creates a sudden increase in intra-abdominal pressure that the pelvic floor has to manage against gravity. When the muscles are still recovering, returning to high-impact exercise too quickly can lead to pelvic organ prolapse, urinary incontinence, sexual dysfunction, and pain. None of those outcomes are inevitable, and none of them should be normalised as the price of motherhood.
There is a hormonal layer too. Breastfeeding can alter hormone status, which can affect prolapse and pelvic stability. Oestrogen levels are lower while you are lactating, and that can influence the connective tissue that supports the pelvic organs. It is not a reason not to breastfeed, and it is not a reason not to run eventually. It is one more reason to build strength back gradually rather than jumping straight back into your pre-pregnancy training plan.
What the 6-week check actually tells you
You will likely receive the "all clear" at your six-week check-up from your GP or obstetrician. That appointment usually checks that your bleeding has settled, any perineal or caesarean wound is healing, and there are no immediate red flags. It is reassuring, and it is worth celebrating.
What the all-clear does not mean is that your tissues have finished healing or are prepared for high-impact activities. Healing of the deep pelvic floor, abdominal connective tissue, and the nerves that supply them takes longer than six weeks for most women, and some changes take closer to twelve months to fully remodel. The pelvic floor muscles need to be able to react quickly under load, and that reactive capacity is something you build, not something that just returns on its own.
This is one of the more frustrating gaps in postnatal care. Many women walk out of that appointment feeling fine, then feel betrayed by their body when they go for a run two weeks later and leak, feel heaviness, or get pelvic pain. The problem is not that their body failed. The problem is that the message they were given did not match what their body was actually ready for.
The first 12 weeks: build the foundation, skip the runs
The guidance that emerged from those 2019 UK guidelines is to train and strengthen your pelvic floor and core muscles in the first twelve weeks after birth. This is the window where low-impact work pays off the most, and where running specifically is not the right tool.
What that looks like in practice:
- Pelvic floor muscle training, ideally taught by a women's health physiotherapist, who can check you are doing it correctly. A pelvic floor contraction is not a strong bearing-down, and many women are doing it without proper lift and release. - Deep abdominal work that focuses on the transverse abdominis, the corset muscle that works with the pelvic floor to support the spine and pelvis. - Low-impact conditioning such as walking, swimming once bleeding has stopped and any wound is healed, and gentle strength training.
This first month postpartum is also a useful window to check out pelvic floor physiotherapy for more individualised care. Postnatal physio in Australia is something you can access with or without a referral, depending on your private health cover, and a good women's health physio will assess your pelvic floor directly (yes, internally), check for diastasis recti, and screen for prolapse before you start running. That kind of assessment costs less than a running watch and is worth far more.
Months 3 to 6: how to bring running back in
You can start incorporating running slowly back into your routine starting three to six months postpartum, with the longer end of that range being more cautious. The word that matters here is "slowly." This is not a return to a training plan. It is a graded reintroduction.
A sensible build goes something like this:
- Weeks one to two: walk-run intervals on flat, soft ground. Think one minute running, two minutes walking, repeated for 20 to 30 minutes. Pay attention to how you feel during, immediately after, and the next day. - Weeks three to four: extend the running intervals if symptoms are absent. Add a second short session in the week if recovery feels good. - Beyond week four: gradually increase volume, then intensity, in that order. Do not chase pace.
Throughout this build, watch for warning signs. Leaking urine, a new heaviness or dragging in the pelvis, pelvic pain that lingers after a run, or a feeling that something is "falling out" are all signals to stop running and book in with a women's health physio. None of these are signs to push through.
Breastfeeding mums do not need to delay running further, but it is worth noting that the hormonal picture during lactation can affect how the pelvic floor and connective tissue respond to load. The same graded approach applies, perhaps even more patiently.
Common mistakes that set mums back
The single biggest mistake is treating the six-week all-clear as a green light for high-impact exercise. It is not. Another common one is skipping pelvic floor physiotherapy because there are "no symptoms." The pelvic floor can be weak without you noticing, and symptoms often only show up under load, which is exactly what running is.
A third mistake is doing too much, too soon, because the mental health benefits feel so good that the body gets ignored. Exercise is associated with improved mood and wellbeing in postpartum women, and that is real. It is also the reason so many mums find themselves running three times a week at four months postpartum and then wondering why they are leaking at week five. The feel-good factor is not evidence that the tissue is coping.
Finally, comparing your timeline to someone else's is a fast track to either overdoing it or feeling bad about how slowly you are progressing. Birth, sleep, feeding, hormonal status, and prior training all matter. Your twelve weeks is not your running friend's twelve weeks.
What to do this week
If you are reading this in the early postpartum weeks, book an appointment with a women's health physiotherapist. Not eventually, this week. Ask for a pelvic floor assessment and a check for abdominal wall recovery, and ask them to give you a home programme you can do in fifteen minutes a day while the baby is on the play mat.
If you are past the twelve-week mark and keen to run, do not start with a run. Start with a walk. Then add short run intervals on a flat, soft surface. Run for one minute, walk for two. Repeat. Notice how your body responds the next day. If anything feels off, your physio's number is the one you call before you lace up again.
Keep doing your pelvic floor and core work alongside the running. Strength is what protects you. It is what allows you to keep running for years, not just for the first month back.
And if you are currently mid-feed, half-asleep, wondering whether you will ever feel like yourself in your body again, you will. With patience, with strength work, and with running added back in at the right time, on your own terms.
Educational content only. Not a substitute for medical advice. Talk to your doctor about your specific situation.
References
Common Questions
When can you start running after giving birth?
Most evidence-based guidance suggests waiting at least 12 weeks postpartum before reintroducing running, even if you receive the all-clear at your six-week check. That appointment generally checks that bleeding has settled and any wounds are healing, but it does not confirm that your pelvic floor and deep core are ready to absorb the repetitive, high-impact load of footstrikes. The 2019 UK postnatal running guidelines recommend using the first 12 weeks to rebuild pelvic floor and transverse abdominis strength first, then layering running back in gradually. If you notice leaking, heaviness, or pelvic pain during or after running, pause and see a women's health physiotherapist before progressing.
Is it safe to run at 6 weeks postpartum?
For most women, running at 6 weeks postpartum is not recommended, even though that is when many receive medical clearance from their GP or obstetrician. The all-clear typically confirms there are no immediate red flags, not that the pelvic floor, abdominal connective tissue, and reactive core control have fully recovered. Tissue healing and neuromuscular control often continue to remodel for up to 12 months after birth. Using the first 12 weeks for pelvic floor training, deep core work, and low-impact movement is generally a safer foundation before reintroducing running.
What are the signs you are not ready to run postpartum?
Common signs your body may not be ready for running include leaking urine when you cough, sneeze, or run, a feeling of heaviness or dragging in the pelvic area, pelvic pain that flares during or after a run, and a visible or palpable gap in the abdominal wall (diastasis recti) that is not yet regaining tension under load. Some women also notice lower back pain or a feeling that their core is not switching on as it should. These signs are common but not something to push through, and a women's health physiotherapist can assess pelvic floor function and help you build back to running safely.
Does breastfeeding affect when you can run?
Breastfeeding can influence the timing of your return to running because lower oestrogen levels during lactation may affect the connective tissue that supports the pelvic organs. This is not a reason to stop breastfeeding, and it is not a reason to avoid running forever, but it is one more reason to progress gradually rather than jumping straight back into your pre-pregnancy training load. Hydration, nutrition, and adequate recovery also matter more when you are lactating and adding exercise back in. If you have specific nutrition or training questions while breastfeeding, an Accredited Practising Dietitian and a women's health physiotherapist can offer tailored guidance.
How do you safely return to running postpartum?
A safe return to running typically starts with a foundation phase of pelvic floor and deep core training, ideally assessed and coached by a women's health physiotherapist who can check you are activating correctly. From there, a gradual walk-to-run progression over several weeks allows your pelvic floor and abdominal wall to adapt to impact load step by step. Pay attention to symptoms like leaking, heaviness, or pelvic pain, and treat these as feedback to scale back rather than push through. If anything feels off, or if you had a more complex birth, talk to your doctor or women's health physiotherapist about your specific situation before progressing.
Jess Mizzi, CPT
Certified Personal Trainer and founder of FitForHer. Specialises in women's life-stage specific fitness — postnatal recovery, perimenopause, and menopause. About Jess →
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making changes to your exercise or nutrition programme.