The Pelvic Floor Under Impact
Why jumping, running, and lifting demand a fully rehabilitated pelvic floor — and what the evidence means for your athletes
The Problem with "Just Push Through It"
Ask any postpartum woman who trains regularly and she will likely tell you: leaking during box jumps, heavy lifts, or sprint intervals is something she's accepted as part of returning to exercise. She's been told it's common. She may have been told it passes. What she's rarely been told is that it's a symptom — one that has a name, a mechanism, and a treatment.
Stress urinary incontinence affects approximately one in three women following childbirth, and rates climb sharply with high-impact exercise. This article focuses on one of the most critical — and most under-communicated — factors in postpartum return to impact sports: the pelvic floor, and what it takes to prepare it for the demands of athletic loading.
What the Pelvic Floor Actually Does Under Load
The pelvic floor is a hammock of muscles and connective tissue spanning the base of the pelvis. Its roles are multiple: it supports the pelvic organs, maintains urinary and fecal continence, contributes to spinal and pelvic stability, and responds dynamically to changes in intra-abdominal pressure. During impact activities — running, jumping, landing — ground reaction forces can reach 1.6 to 2.5 times body weight, and the pelvic floor must respond quickly and forcefully to contain that pressure.
After pregnancy and delivery, this system is significantly altered. Stretch injury to levator ani muscles occurs in up to 30% of vaginal deliveries. Pudendal nerve damage can reduce neuromuscular coordination. Hormonal changes alter connective tissue integrity. The result is a pelvic floor that may have adequate passive strength but compromised active motor control — and it's motor control, not raw strength alone, that matters under impact load.
“Leaking during training is common. It is not normal — and the gap between current capacity and athletic demand can be closed with targeted PT.”
Common But Not Normal: Reframing the Conversation
One of the most important clinical contributions a PT can make in this space is linguistic. The phrase 'common but not normal' is not a cliché — it is a reframe that gives patients permission to seek help for a symptom they have been told to accept. Leaking with a jump squat is common. It is not, however, normal, and it is not inevitable. It is a sign that the load exceeds the pelvic floor's current capacity — and that gap can be closed with targeted rehabilitation.
The same principle applies to pelvic heaviness at the end of a training day, to difficulty with high-impact activity even without leaking, and to pain with intercourse that persists postpartum. These are symptoms, not inherent consequences of having given birth. Normalizing them delays treatment. Reframing them opens the door.
KEY RESEARCH FINDINGS
High-impact exercise increases pelvic floor dysfunction risk nearly 5× compared to low-impact activity
Pelvic floor muscle training (PFMT) reduces urinary incontinence odds by 37% postpartum (Beamish et al., BJSM 2024, 65 studies, 21,334 participants)
Cochrane review confirms PFMT significantly reduces prevention and treatment of postnatal incontinence (Woodley et al., 2020)
Levator ani injury occurs in ~30% of vaginal deliveries — often subclinical until loaded movement begins
What Pelvic Floor PT for Athletes Actually Looks Like
Pelvic floor rehabilitation in the postpartum athlete is not simply Kegel exercises. A comprehensive PT approach includes internal and external assessment of pelvic floor tone, strength, endurance, and coordination; functional movement screening under load; training of co-contraction between pelvic floor, transversus abdominis, and diaphragm; and progressive loading that mirrors sport-specific demands.
For the impact athlete specifically, the goal is to train the pelvic floor to respond reflexively and appropriately to the forces of running, jumping, and landing — not just to contract on command. This requires a progression from isolated voluntary contraction to automatic, integrated function under dynamic load. That progression does not happen without guided rehabilitation.
When to Refer: Red Flags and Green Lights
Any postpartum woman reporting urinary or fecal incontinence, pelvic organ prolapse symptoms (heaviness, bulge, pressure), pelvic pain, or pain with intercourse should receive a pelvic floor PT referral before returning to impact sport. These are clinical indicators of pelvic floor dysfunction that will likely worsen with high-impact loading without intervention.
Green lights for beginning impact progression include: continent with all daily activities and low-impact exercise, no pelvic organ prolapse symptoms after 30 minutes of activity, able to perform single-leg squat with pelvic floor control, and walking 30 minutes without symptom onset. These criteria — not a calendar date — are the gate.
References: 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.
Mørkved S, Bø K. Effect of pelvic floor muscle training during pregnancy and after childbirth on prevention and treatment of urinary incontinence: a systematic review. Br J Sports Med. 2014;48(4):299–310.
Woodley SJ, et al. Pelvic floor muscle training for prevention and treatment of urinary and faecal incontinence in antenatal and postnatal women. Cochrane Database Syst Rev. 2020.
Haylen BT, et al. An IUGA/ICS joint report on the terminology for female pelvic floor dysfunction. Neurourol Urodyn. 2010;29(1):4–20.
Goom T, Donnelly G, Brockwell E. Returning to running postnatal — guidelines for medical, health and fitness professionals. 2019.