The six week postnatal check clears you for exercise. Many people quite reasonably read that as clearance to run, lace up that week, and find that something does not feel right.
The check confirms that healing is progressing normally. It is not an assessment of whether your body can currently tolerate the roughly two and a half times bodyweight that lands through each leg, several hundred times, on every run.
Those are different questions.
Why running specifically is demanding
Walking is a low impact activity with continuous ground contact. Running is a series of controlled landings. Each one sends an impact through the pelvic floor, the abdominal wall and the whole lower limb chain, and each one requires that system to generate pressure control within a fraction of a second.
Pregnancy changes every component of that system:
- The pelvic floor has carried increasing load for months, and often a delivery on top
- The abdominal wall has lengthened, reducing its ability to stiffen the trunk
- Hip and gluteal strength typically falls during late pregnancy and early postpartum
- Sleep deprivation reduces tissue recovery and coordination
None of that is damage. All of it is capacity that has to be rebuilt before it is tested.
Current expert guidance suggests around twelve weeks postpartum as the earliest reasonable point to return to running, and that is a floor rather than a target. Readiness matters more than the date.
Readiness, not the calendar
Before running, most people should comfortably manage the following without pain, heaviness or leaking:
| Test | What to aim for |
|---|---|
| Walking | 30 minutes briskly, comfortably |
| Single leg balance | 10 seconds each side, steady |
| Single leg calf raise | 20 repetitions each side |
| Single leg bridge | 20 repetitions each side |
| Single leg sit to stand | 20 repetitions each side |
| Jogging on the spot | 1 minute |
| Hopping on one leg | 10 each side |
| Bounding or forward hopping | 10 each side |
If any of those provoke leaking, heaviness or dragging in the pelvis, or pain anywhere, that is the information you needed. It is not a verdict, it is a starting point for what to work on.
Most people who fail these fail on single leg strength, and that is straightforwardly trainable.
Building up to it
Weeks 0 to 6: breathing and reconnection. Diaphragmatic breathing, gentle pelvic floor work, walking as comfort allows. Nothing heroic.
Weeks 6 to 12: strength. This is the part that determines everything afterwards, and the part most often skipped in the rush back to cardio. Squats, bridges, step ups, calf raises, carries. Progress by adding load, not just repetitions. Work the single leg versions deliberately, because running is a single leg activity. Our postnatal foundations set covers the stage before this one, and the core foundations set the stage after.
Weeks 12 and beyond: impact, gradually. Walk to run intervals. One minute running, two minutes walking, repeated eight times, is a sensible first session. Add running time before adding total distance, and only progress when the previous week has been symptom free.
Keep strength training throughout. Running is not a substitute for it. The strength work is what allows the running to continue.
About leaking
Leaking during running is common postnatally. It is also not something to accept as permanent, and it is not something to push through.
Around a third of people leak at some point after childbirth. It responds well to treatment in most cases. What it should not do is quietly determine your life: skipping the run, planning routes around toilets, wearing pads indefinitely and never mentioning it to anyone.
Two things worth knowing. First, pelvic floor muscle training has strong evidence behind it, better than almost any other conservative treatment in this area. Second, not everyone needs strengthening. Some pelvic floors are already overactive and struggle to relax, and for those people more clenching makes symptoms worse. That is exactly why a generic "do your Kegels" instruction fails a substantial minority, and why an assessment is worth having before committing to a programme.
Signs to slow down
- Leaking during or after running
- Heaviness, dragging or bulging in the pelvis, particularly later in the day
- Increased or returning bleeding after a session
- Doming along the midline of the abdomen, covered in our guide to diastasis recti
- Pelvic, low back or hip pain that lingers into the next day
Any of these mean the current dose is above current capacity. Step back a stage, keep the strength work going, and rebuild. They do not mean you have done damage or that running is off the table.
Caesarean and complicated deliveries
A caesarean is major abdominal surgery, and the timeline is generally longer rather than shorter. Scar tissue can restrict movement and reduce abdominal recruitment, and scar mobilisation once healing is complete is worth doing.
Third or fourth degree tears, prolapse, or a difficult instrumental delivery all warrant a proper assessment before impact rather than a self managed return.
Get it assessed if
You are leaking or feeling heaviness, you have pelvic or back pain, you are unsure whether your pelvic floor needs strengthening or relaxing, you had a complicated delivery, or you have simply been told to "take it easy" without anyone telling you what to actually do.
Returning to running is achievable for the overwhelming majority of people. It takes longer than most expect, and the strength work in the middle is not optional.