Your GP said six weeks. The internet said whenever you feel ready. The truth is more nuanced — and understanding it might be the most important thing you do for your body after having a baby.
The Contradiction That Isn't Your Fault
Your GP said six weeks. Your mother said three months. The internet said whenever you feel ready. And your body said nothing coherent — because it was running on four hours of sleep and sheer survival.
If you have ever felt confused about when to return to exercise after having a baby, you are not imagining it. The advice really is contradictory. And understanding why it is contradictory might be the most useful thing you can do for your body right now.
Why the Six-Week Rule Exists
The wait six weeks advice comes from historical practice and general clinical guidelines — not from a large-scale study proving that six weeks is when your body is ready to train again.
Historically, six weeks was the standard because that is roughly how long it takes for the uterus to contract back to its pre-pregnancy size and for initial healing after delivery to occur. Give the body time to do its baseline repair, then get cleared.
That is not wrong. But it is not the full picture either.
Every birth is different. A straightforward vaginal birth at six weeks postpartum is a completely different situation from a caesarean, a significant perineal tear, or pelvic floor trauma. The six-week mark is a check-in with your GP — not a finish line.
What Your GP Is Actually Checking
At your six-week postnatal check, your doctor is generally assessing whether your uterus has returned to its pre-pregnancy position and size, whether any surgical sites from a caesarean or tearing are healing, whether bleeding has stopped, and your general physical recovery.
What they are generally not assessing in detail: pelvic floor function, abdominal separation (diastasis recti), strength and movement capacity, or readiness to return to your previous fitness level.
This is a medical clearance. It matters. But it is not the same as a fitness readiness assessment. Those are two very different things — and most women are not told that.
The Pelvic Floor Reality
This is the part that most return-to-exercise advice skips over. And it is arguably the most important.
Your pelvic floor is a bowl-shaped muscle sling that supports your bladder, bowel, and uterus. Pregnancy and birth put enormous load on it — and for many women, it takes significant time and specific rehabilitation to fully recover.
Symptoms that suggest your pelvic floor needs more attention before you return to high-intensity exercise include leaking urine when you cough, sneeze, jump, or run; a heaviness or dragging sensation in your pelvis; difficulty controlling gas or bowel movements; and pain during intercourse.
If any of those apply to you, a women's health physiotherapist is genuinely one of the best investments you can make. They are specialists in exactly this — and they can assess your actual function, not just whether things have healed on the surface.
In Australia, you do not need a referral. You can book directly with a women's health physio or pelvic floor physiotherapist.
What Diastasis Recti Actually Means
Diastasis recti — the separation of your abdominal muscles at the midline — is extremely common during and after pregnancy. It happens because the connective tissue (the linea alba) stretches and thins to accommodate a growing belly.
A mild to moderate diastasis by itself is not dangerous. Many women have it without knowing. It is also not the same as a hernia, though they can look similar.
What actually matters is whether the tissue feels firm and taut when you press on it, whether you can generate tension through the midline doing core work, and whether you notice any doming or coning of your belly during abdominal exercises.
Traditional exercises that strain the midline before it is ready — crunches, sit-ups, full planks — can make a diastasis worse or prevent it from closing. What helps: breathing-based core activation, gentle isometric work, and progressively loading the abdominal wall in a supported position.
A pelvic floor physiotherapist can assess your diastasis properly and give you exercises specific to your situation. This is not one-size-fits-all.
So When Can You Actually Start?
Here is the honest answer: it depends on what you mean by exercise.
Day one or two (with caveats): Gentle walking, deep breathing, and pelvic floor activation can begin very early — within days of an uncomplicated delivery. Pelvic floor contractions and gently drawing your belly button toward your spine while breathing out are things you can do while feeding your baby. They are not going to get you fit. But they start the reconnection process.
Weeks 1 to 6: Slow, deliberate movement. Walking. Breathing work. Gentle floor-based exercises that do not put significant pressure on your pelvic floor or abdominal wall.
At medical clearance (6 to 8 weeks): Most GPs give the all-clear for general activity here. Cleared does not mean ready for your pre-pregnancy training. It means your body has done its baseline healing and you can begin a gradual return.
Beyond six weeks: More structured exercise — but built progressively. The research on postnatal exercise is consistent on one point: the body responds best to gradual progression, not dramatic re-entry.
What Too Much, Too Soon Actually Looks Like
You might not realise it is happening. Signs you are doing too much too soon include: bleeding returning after it had stopped, or new bright red bleeding; feeling more exhausted the day after exercise than the exercise itself; worsening pelvic floor symptoms — more leaking, more heaviness, more pain; persistent lower abdominal discomfort; and worsening joint pain or a general sense of being run-down.
These are not signs to push through. They are your body asking you to slow down. Listen to it.
A Phased Return to Exercise
This framework aligns with what women's health physiotherapists generally recommend for postnatal return to exercise.
Phase 1 — Weeks 1 to 6 (once bleeding has settled): Daily walking as tolerated. Pelvic floor activation — engage, hold, release. Gentle deep core breathing. Gentle glute activation like glute bridges.
Phase 2 — Weeks 6 to 12, after medical clearance: Continued walking and low-impact cardio — stationary cycling, swimming. Progressively loaded lower body work — squats, step-ups. Core reconnection — modified dead bugs and supported planks, only when you can do them without doming or discomfort. Continued pelvic floor work throughout.
Phase 3 — 3 to 6 months postpartum: Progression to higher-intensity cardio. More challenging core exercises with meaningful load. Strength training with real resistance. Running and high-impact movement — only when your pelvic floor is genuinely ready for it.
Your timeline will be your own. A first birth, a caesarean, a complicated delivery, or multiple babies close together all shift what is appropriate and when.
The Thing Nobody Actually Tells You
Postnatal fitness is not about bouncing back. It never was. It is about rebuilding — sometimes from a very different baseline than you started from.
Your body grew and birthed a human. That is not something you repair in six weeks of shapewear and protein shakes.
The most important things you can do: see a pelvic floor physiotherapist — ideally before or soon after birth. Stop measuring your timeline against anyone else's. Use symptoms as your guide, not a date on a calendar. And understand that restoring core and pelvic floor function matters far more than losing the baby weight.
If something has felt off since having your baby — leaking, pain, a sense that your body just does not feel right — that is not weakness, and it is not something you have to live with. It is information. And there is help available.
References
- Donnelly GM, Rankin A, Mills H, De Vivo M, Goom TS, Brockwell E. (2020). Guidance for medical, health and fitness professionals to support women in returning to running postnatally. British Journal of Sports Medicine, 54(18), 1114-1115.
- Goom T, Donnelly G, Brockwell E. (2019). Returning to running postnatal - guidelines for medical, health and fitness professionals managing this population. Physiotherapy, 107, e188-e189.
Common Questions
How soon after giving birth can I start exercising?
Most women can begin gentle movement — short walks and pelvic floor exercises — within the first few days after an uncomplicated vaginal birth. Returning to structured exercise, the gym, or high-impact activity should wait until after your 6-week postnatal check with your GP or midwife. Even then, that clearance means you can begin gradually — not return to your previous training load. Full tissue healing takes at least 16 weeks, and up to 6 months for many women.
Why does my doctor say to wait 6 weeks before exercising after birth?
The 6-week guideline exists because it is the standard timing for your postnatal check-up — not because everything heals in exactly 6 weeks. Your pelvic floor, abdominal wall, and soft tissues need significantly more time. Research shows full recovery can take 4 to 6 months. The 6-week mark is the beginning of a gradual return, not permission to resume your pre-pregnancy training.
Is it safe to exercise with diastasis recti after birth?
Yes, but with important modifications. Exercises that load the outer abdominal muscles — sit-ups, crunches, and planks — should be avoided until a women's health physiotherapist has assessed your abdominal separation and cleared you for progressive loading. Safe starting exercises include diaphragmatic breathing, gentle abdominal bracing, and pelvic floor activation. A physio-guided return is strongly recommended.
How long after birth can I start running again?
Most women's health physiotherapists recommend waiting at least 12 weeks after birth before attempting to run — and for many women, 16 to 20 weeks is more realistic. Running is high-impact and places significant stress on the pelvic floor. Returning too early is associated with urinary incontinence, pelvic organ prolapse, and injury. A graded return — building from walking to running intervals — is the safest approach.
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.