08/17/2026
Most birth prep online is mobility work. Hip openers, deep squats, figure fours, a lot of stretching.
Mobility matters. Itâs how you get into and out of the positions that open all three levels of the pelvis, the inlet, the mid pelvis, and the outlet, and how you move between them while youâre laboring.
But more mobility is not automatically better in pregnancy. Relaxin and the other hormones already have your ligaments more lax than usual, so your joints have less passive support than they did before.
When you keep chasing more range on top of that, women can end up with p***c symphysis pain, SI joint pain, or low back pain. The joint doesnât need more room. It needs more controlâŚ.
Thatâs why I lean heavily on strength training to open all three levels of the pelvis. A squat, a lunge, a hip hinge, a deep split stance take you through those same ranges, and you build strength through the range instead of just hanging out in it.
You get the position plus the ability to hold it, change it, and produce force in it, which is what labor actually asks for.
I still prescribe mobility work. Just a lot less of it than people expect.
Andddd mobility and flexibility arenât the same thing.
Mobility is how much motion you can control at a joint. Flexibility is how much a tissue can lengthen.
During a vaginal delivery, your pelvic floor muscles can stretch to about three times their resting length. Thatâs tissue extensibility, and itâs trained differently.
Thatâs why birth prep includes things beyond exercise. Learning to fully relax and lengthen your pelvic floor on demand, breath work that takes tension out instead of adding it, perineal work in the last few weeks, hands-on treatment if thereâs real tension, and practicing pushing mechanics so you know how to coordinate all of it when pushing.
The women I work with train strength and mobility and flexibility, and they practice the coordination piece before theyâre in a room with contractions.
If youâre pregnant and just realized you donât know, what you donât know⌠Iâm a pelvic floor physical therapist and I work 1:1 with clients in Chicago and online offering custom programs.