Pregnancy & Postpartum

Pregnancy and birth bring profound physical transformations to the pelvic floor, abdominal wall, and core stabilizing system. Postpartum recovery is not a race to “bounce back,” but an evidence-based biological healing process requiring respect, accurate assessment, and progressive rehabilitation.

Biomechanical and Hormonal Changes in the Maternal Body

Throughout pregnancy, maternal physiology adapts continuously to support fetal development. Circulating relaxin and progesterone increase ligamentous laxity throughout the sacroiliac joints, pubic symphysis, and pelvic connective tissues. Simultaneously, the expanding uterus shifts the body’s center of gravity forward, increasing lumbar lordosis and anterior pelvic tilt.

The levator ani muscles undergo sustained downward loading, and during vaginal birth, they stretch to over three times their resting length to allow delivery. Whether you gave birth vaginally or via Cesarean section, your pelvic floor supported months of substantial intra-abdominal load and requires intentional postpartum recovery.

Phased Postpartum Recovery Timeline

Clinical guidelines advocate a structured, phased progression tailored to tissue remodeling timelines rather than arbitrary calendar milestones.

Phase 1: The Fourth Trimester (0 to 6 Weeks Postpartum)

The primary focus during the initial six weeks is cellular healing, swelling reduction, and gentle nervous system regulation. High-intensity exercise or aggressive abdominal loading during this window is contraindicated.

Phase 2: Early Functional Rehabilitation (6 to 12 Weeks Postpartum)

Following clearance at your 6-week postnatal obstetric checkup, begin progressive restoration of low-impact functional strength. This includes:

Phase 3: Returning to High-Impact Exercise and Running (12+ Weeks Postpartum)

International evidence-based consensus guidelines (Goom, Donnelly, & Brockwell, 2019) strongly recommend that running and high-impact ballistic exercise should not be resumed prior to 12 weeks postpartum. Fascial and collagen recovery continues for up to 6–12 months after birth. Returning to high-impact activities too early significantly increases the incidence of urinary incontinence, pelvic organ prolapse, and long-term pelvic floor trauma.

Before resuming running, your body should be able to complete a standardized readiness battery without pain, leaking, or vaginal heaviness, including:

Understanding Diastasis Recti Abdominis (DRA)

Diastasis Recti Abdominis refers to the separation of the rectus abdominis muscle bellies along the midline connective tissue, the linea alba. Near 100% of women exhibit some degree of midline widening by the 35th week of pregnancy. While common, chronic dysfunction occurs when the linea alba cannot generate appropriate fascial tension during physical tasks.

Modern physical therapy focuses less on closing the gap to zero millimeters and more on tension transmission. Managing intra-abdominal pressure—avoiding breath-holding during lifting, rolling to your side before sitting up out of bed (the “log roll”), and strengthening deep transverse abdominis and pelvic floor stabilizers—restores functional core transfer far more effectively than traditional sit-ups or crunches.

Reputable Medical References and Guidelines

• American College of Obstetricians and Gynecologists (ACOG Clinical Consensus No. 1): Optimizing Postpartum Care. Advocates transitioning postpartum care from a single six-week visit to an individualized, ongoing process (“The Fourth Trimester”). (acog.org)
• Royal College of Obstetricians and Gynaecologists (RCOG): The Management of Third- and Fourth-Degree Perineal Tears (Green-top Guideline No. 29). Evidence-based guidance on obstetric anal sphincter injury (OASI) management and multi-disciplinary follow-up. (rcog.org.uk)
• APTA Pelvic Health: Clinical guidelines on postpartum physical therapy screening and rehabilitation. (aptapelvichealth.org)