Most experts recommend waiting at least 12 weeks postpartum before you start running again. The old standard was 6 weeks, timed to the typical postpartum checkup, but that timeline was based more on tradition than on how long your body actually needs to recover from pregnancy and delivery. Your muscles, joints, connective tissue, and pelvic floor all undergo significant changes during pregnancy, and running is a high-impact activity that demands a lot from each of them.
Why 12 Weeks, Not 6
The 6-week postpartum visit was never designed as a green light for intense exercise. It’s a general wellness check. The American College of Obstetricians and Gynecologists (ACOG) states that exercise routines can be resumed gradually “as soon as medically safe,” depending on whether you had a vaginal or cesarean delivery and whether there were complications. In practice, many physical therapists and sports medicine practitioners now recommend waiting a full 12 weeks before any high-impact activity like running.
The reason is straightforward: your body is still healing at 6 weeks. Your pelvic floor muscles have been stretched and weakened, your abdominal wall may still be separated, and a hormone called relaxin is still circulating at elevated levels. Relaxin loosens your muscles, joints, and ligaments during pregnancy to make room for the baby and prepare for delivery. After birth, those levels drop but can take up to 12 months to fully return to normal. That means your joints and ligaments remain looser than usual, making you more prone to sprains and other injuries when you’re absorbing the repeated impact of running.
C-Section Recovery Takes Longer
If you had a cesarean delivery, you’re healing from major abdominal surgery on top of everything else. The incision cuts through skin, fat, and the tough connective tissue layer (fascia) that holds your abdominal muscles together. General guidance is to avoid heavy abdominal exercise or lifting anything heavier than your baby for 4 to 6 weeks. Running, which recruits your core with every stride, puts real stress on that healing tissue.
Most people who had a C-section find that 12 weeks is the absolute minimum before they feel ready to run, and many need closer to 16 weeks. The scar tissue needs time to mature and regain strength. Pushing too early can lead to pain around the incision, weakness in the abdominal wall, or worsening of any diastasis recti (the gap between your left and right abdominal muscles that develops during pregnancy).
Signs You’re Not Ready Yet
The calendar is a rough guide, but your body gives you more specific feedback. These symptoms during or after walking, light jogging, or jumping tell you that running is still too much:
- Urinary leakage when you cough, sneeze, jump, or jog, even small amounts
- A feeling of heaviness or pressure in your pelvis, sometimes described as something “falling out”
- Pain in your pelvis, lower back, or C-section scar during or after activity
- Ongoing bleeding that increases with exercise (postpartum bleeding typically resolves by 6 weeks)
Any of these suggests your pelvic floor or abdominal wall isn’t ready for impact yet. Leaking urine while running is common postpartum, but it’s not something you should push through. It’s a signal that your pelvic floor can’t yet handle the load, and continuing to run on a weakened pelvic floor can make the problem harder to fix later.
How to Test Your Readiness at Home
Before your first run, try these simple physical tests to see if your body can handle impact. You should be able to complete all of them without pain, leaking, or a feeling of pelvic heaviness:
- Single-leg balance: Stand on one leg for 30 seconds on each side without losing your balance
- Single-leg heel raises: Rise up on your toes on one foot, 10 times per side
- Step-downs: Step down off a low step slowly and controlled, 10 repetitions
- Hop in place: Hop on both feet for 30 seconds
- Single-leg hops: Hop on one foot for 30 seconds per side
If hopping on one foot causes leaking, pelvic pressure, or pain, you have a clear answer: your body needs more time or targeted rehab before running. These tests mimic the forces your body absorbs during a run, so they’re a practical preview of how your first jog will feel.
Building Back Gradually
Even once you pass those readiness tests, jumping straight into your pre-pregnancy running routine is a recipe for injury. Your cardiovascular fitness may feel fine, but your musculoskeletal system has been through months of change and needs a gradual reintroduction to impact.
Start with brisk walking for 20 to 30 minutes. Once that feels easy and symptom-free, try alternating between 1 minute of jogging and 2 minutes of walking for a total of 15 to 20 minutes. Increase the jogging intervals over the course of several weeks. Pay attention to how you feel not just during the run but in the hours afterward and the next morning. Delayed pelvic heaviness or low back soreness the day after a run is just as telling as symptoms during the run itself.
Pelvic floor exercises (often called Kegels, though the full range of pelvic floor work goes well beyond simple squeezes) are worth starting much earlier, within the first few weeks postpartum for vaginal deliveries and once your provider clears you after a C-section. Strengthening these muscles before you start running gives them a better foundation for handling impact.
Gear That Makes a Difference
Your body has changed, and gear that worked before pregnancy may not work now. Two areas matter most for comfort and safety.
Breast size and shape often change significantly, whether or not you’re nursing. A high-impact sports bra sized by cup and band (rather than generic small, medium, large) provides far better support. Look for wide straps, a hook-and-eye closure in the back for a customizable fit, and molded cups that support rather than flatten. If you’re nursing, some running bras offer clip-down access. Chafing on the underside of the breasts is common with postpartum size changes, so anti-chafe balm can prevent raw skin on longer runs.
Shoes deserve a second look too. Because relaxin keeps your ligaments looser for months after delivery, your feet may have widened or your arch may sit lower than before. If your old running shoes feel tight or your feet ache in a new way, get refitted. Some of these changes are permanent.
When a Pelvic Floor Specialist Helps
If you’re past 12 weeks and still experiencing leaking, pelvic pressure, or pain with basic impact like hopping, a pelvic floor physical therapist can identify exactly what’s going on. They assess the strength, coordination, and endurance of your pelvic floor muscles and create a targeted plan. Many people assume that leaking after having a baby is just the new normal. It doesn’t have to be. Pelvic floor PT resolves or significantly improves these symptoms for most postpartum runners, often within a few months of consistent work.
If you had a complicated delivery, a third- or fourth-degree tear, or prolapse symptoms, seeing a pelvic floor specialist before starting any running program is especially valuable. They can help you set a realistic, individualized timeline rather than relying on general guidelines that may not fit your situation.