Why "6-Week Clearance" Is No LongerGood Enough
The outdated standard leaving postpartum athletes behind — and what the evidence now says
A Moment That Changed How I Practice
She came in six weeks after her second delivery, a printout in hand. Her OB had written two words across the top in blue ink: “Cleared. Resume.” She was a competitive CrossFit athlete. She wanted to know if she could snatch again.
I asked her a few questions. Could she walk up a flight of stairs without leaking? Did she have any pelvic heaviness by the end of the day? Had she tried any loaded movement yet? She answered no, yes, and no. She hadn’t been asked any of these things at her appointment.
That printout — two words, a signature — represented the entirety of her postpartum return-to-sport plan. And while her OB meant well, the standard that produced that note is, by the weight of current evidence, no longer defensible for athletes who want to return to impact sports.
Where the Six-Week Standard Came From
The postpartum six-week visit is a legacy of obstetric care, not sports medicine. Its origin was never about athletic readiness. It was about ensuring uterine involution, wound healing, and contraception counseling — legitimate clinical goals, but ones that have almost nothing to do with whether someone's pelvic floor can tolerate a box jump.
Over decades, the phrase 'six-week clearance' calcified into something patients and even some providers assumed was a guarantee of physical readiness. The disconnect between that assumption and the physiological reality of the postpartum body is profound.
Pregnancy affects virtually every organ system. Hormonal changes, pelvic floor trauma, abdominal wall changes, altered biomechanics, sleep disruption, and the metabolic demands of lactation don't resolve in six weeks. For athletes, these variables interact with training load in ways the standard OB clearance simply isn't designed to assess.
“What postpartum athletes need is a criterion-based return-to-sport framework, not a calendar-based one.”
What the Research Actually Says
In 2023, a scoping review published in BJSM (Thornton et al.) examined 33 existing postpartum return-to-activity recommendations. Its finding was stark: not a single guideline used formal criteria to assess readiness. The majority were time-based — not criterion-based — and the term 'medically safe' appeared frequently but was left broadly undefined.
In 2024, an international Delphi consensus statement (Christopher et al.) surveyed 118 clinicians across multiple rounds to define return-to-running readiness. The consensus: a minimum of three weeks of rest, followed by individualized, graduated progression — with formal clearance for running generally appropriate no earlier than 12 weeks postpartum, and only when specific physical milestones are met. Not a date. A set of criteria.
Most recently, a 2025 Delphi study (Davenport et al.) reinforces that postpartum return to exercise requires individualized, symptom-informed screening at every step of progression.
WHAT THE RESEARCH SAYS AT A GLANCE
No current guidelines use formal criteria to assess postpartum return-to-sport readiness (Thornton et al., BJSM 2023)
International expert consensus recommends individualized clearance no earlier than 12 weeks postpartum (Christopher et al., BJSM 2024)
The term "medically safe" appears widely in postpartum guidelines but is broadly undefined
A realistic return-to-impact window for most postpartum athletes is 3–6 months, not 6 weeks
Why 'Medically Safe' Isn't the Same as 'Physically Ready'
A patient can be medically safe to exercise — no infection, no wound complication, no red flag — and still be nowhere near physically ready for impact sports. These are not the same thing.
The pelvic floor undergoes significant strain during pregnancy and delivery. Ground reaction forces during running reach 1.6–2.5 times body weight. If the neuromuscular system governing pelvic floor function hasn't been rehabilitated — not just rested, but actively retrained — returning to those loads is a recipe for chronic symptoms: stress urinary incontinence, pelvic organ prolapse, pelvic pain.
The same is true of the abdominal wall. Diastasis recti abdominis affects the majority of women to some degree in the third trimester and early postpartum period. Its functional implications for load transfer, core stability, and impact tolerance aren't screened at the six-week OB visit. And that says nothing of ligamentous laxity, cardiovascular deconditioning, altered movement patterns, and bone density changes — none of which are assessed by a two-word clearance note.
The PT's Role: The Bridge That's Been Missing
Physical therapists — particularly those with postpartum or pelvic health specialization — are uniquely equipped to fill the space between obstetric clearance and athletic return. We are trained to assess functional movement, neuromuscular control, pelvic floor integrity, and load tolerance. We work in the time domain that matters most for postpartum athletes: the weeks and months after the OB has signed off and before the athlete takes the field.
A 2024 meta-analysis by Beamish et al. (BJSM) found that targeted pelvic floor muscle training reduced the odds of postpartum urinary incontinence by 37% across 65 studies and 21,334 participants. That is a meaningful, preventable burden — and it starts with getting athletes into the right room.
What I Tell Athletes in My Clinic
When a new postpartum patient asks me when she can go back to CrossFit, or running, or competitive soccer, I tell her the honest answer: it depends on you, not on a date.
Some women are ready to begin low-impact cardio at eight weeks and impact progression by fourteen. Others take longer — not because they're doing something wrong, but because bodies don't follow calendars. What I can promise every patient is that she will get a proper assessment, a clear set of criteria to work toward, and a plan built around her sport, her body, and her timeline.
That conversation — the one that the six-week clearance visit often doesn't leave room for — is one of the most valuable things a postpartum PT can offer. It reframes return to sport as something a woman works toward with guidance, not something that simply happens after a countdown.
References: Thornton JS, et al. Navigating the 'new normal': what guidelines exist for postpartum return to physical activity and sport? A scoping review. Br J Sports Med. 2023;57(22):1426–1434.
Christopher SM, et al. Clinical and exercise professional opinion of return-to-running readiness after childbirth: an international Delphi study. Br J Sports Med. 2024;58(6):299–312.
Davenport MH, et al. International Delphi study of clinical and exercise professionals' opinion of physical activity prescreening and contraindications for postpartum physical activity. Br J Sports Med. 2025;59(8):527–538.
Beamish NF, et al. Impact of postpartum exercise on pelvic floor disorders and diastasis recti abdominis: a systematic review and meta-analysis. Br J Sports Med. 2024.
Hewitt CM, et al. Exploring the postpartum return to sport and performance in Canadian elite athletes. Front Sports Act Living. 2025;7:1665212.
Woodroffe L, et al. Return to running for postpartum elite and subelite athletes. Sports Health. 2025;17(3):614–620.