The #1 Postpartum Core Mistake (And How to Actually Fix It)

Jen Landry Author

Stop doing crunches. Learn how to heal your postpartum core, flatten your stomach, and fix lower back pain by rebuilding your deep foundation.

We’ve all seen it. The "bounce back" culture is absolutely everywhere, screaming at new moms to jump right back into intense workouts, hit the gym, and grind their way back to their pre-baby bodies.

As a movement specialist, I see the fallout of this mindset every single day. Moms come to me frustrated, exhausted, and feeling stuck because their bellies aren't flattening, no matter how hard they work.

They tell me, "I’ve been doing hundreds of crunches and holding planks until I shake, but my stomach still domes out and my lower back is killing me."

If that sounds familiar, I have some news that might shock you, but will hopefully bring you a massive sigh of relief: The "bounce back" culture lied to you. You don’t need harder exercises. You need to restore your foundation.

The Mistake: Cranking Up the Pressure Too Soon

When you try to force traditional core exercises onto a postpartum body that hasn’t been rebuilt from the inside out, your deep abdominal wall simply can’t handle the pressure.

Think of your core like a house. If the foundation is cracked, adding a heavy second story isn't going to fix it—it’s going to cause a collapse. High-pressure moves like standard crunches, sit-ups, or heavy planks on an unconditioned postpartum core do exactly that. Instead of flattening your stomach, they push your belly outward (causing that distinct "doming" or "pooching" effect) and force your lower back to take the entire hit.

You aren't failing the exercise; your deep abdominal wall just hasn't woken up yet.

The Fix: Wake Up Your Inner Corset

Before you load the system, you have to reboot the foundation. We need to shift the focus away from the superficial "six-pack" muscles and wake up the transverse abdominis (your body's natural internal corset) so it can start working in tandem with your pelvic floor again.

Instead of fighting your body with crunches, I want you to try this foundational reset tonight.

The Foundation Reset

1. The Setup: Lie on your back with your knees bent and your feet flat on the floor. Keep your body relaxed.
2. The Inhale: Take a deep, full breath into your ribs and belly. Let everything expand naturally.
3. The Exhale & Connection: As you slowly exhale, imagine gently drawing your hip bones together. At the same time, picture zipping up from your pelvic floor all the way up to your belly button.

Movement Tip: Your lower back should gently anchor into the floor—not smash or flatten into it with force. Think of it as a subtle, deep engagement, not a struggle.

Ready to Rebuild?

True core strength isn't about how long you can hold a plank; it’s about how well your muscles communicate with each other. At Moms Fit Life, we don't guess—we rebuild.

If you are ready to finally ditch the frustrating crunches, stop the lower back pain, and fix your core foundation for good, leave a comment below with a 🧱 or reach out to us today. Let's rebuild your strength from the inside out.

Categories: : Deep Core, Pelvic Floor & Core Health