Does Your Stomach Dome When You Sit Up?

Written by:
Dr. Ashlea Lytle
October 21, 2026

That doming or bulging down the middle of your stomach may be a sign of diastasis recti (DR). Diastasis recti is more than just a “gap” between your abdominal muscles. It involves changes to the linea alba, the connective tissue between the two sides of your rectus abdominis. How your abdominal wall creates and manages tension can be just as important as the distance between the muscles. That's where we come in as physical therapists. Working with a PT who specializes in pelvic health dysfunction and Low Pressure Fitness (LPF) can help you better understand your individual presentation and develop a personalized rehabilitation plan.

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Contact us at Activcore Physical Therapy to get help now.

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How Can Pelvic Health Physical Therapy Help?

Diastasis recti rehabilitation is not simply about measuring the distance between the abdominal muscles. Your physical therapist can assess:

  • Abdominal muscle coordination and function.
  • Breathing mechanics and pressure management.
  • Tension and responsiveness through the linea alba.
  • Pelvic floor and spinal muscle coordination.
  • How your symptoms change during everyday movements and exercise.

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At Activcore Physical Therapy, your treatment may include a combination of hands-on techniques, breathing retraining, Low Pressure Fitness, and progressive strengthening based on what your body needs.

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How Can Low Pressure Fitness Help?

Low Pressure Fitness (LPF), also known as hypopressives, combines specific postures, breathing, and an expiratory breath hold with rib cage expansion.

Think of your core like a suspension bridge. Your diaphragm, transverse abdominis, obliques, pelvic floor, fascia, and other connective tissues all work together to distribute tension and manage pressure.

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LPF uses posture and breathing to help you become more aware of this system and practice coordinating tension through your abdominal wall.

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Research on hypopressives and diastasis recti is still developing, but studies have found improvements in abdominal muscle function, and some have reported reductions in inter-rectus distance. Importantly, research protocols involve repeated, supervised training—not simply learning the technique once.

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And that matters.

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LPF takes practice. It can take several visits to understand the positioning, breathing sequence, rib expansion, and vacuum. When appropriate, combining hands-on treatment with LPF and progressive core exercises may provide a more individualized approach to improving abdominal wall function and tension.

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The goal isn't simply to make the gap smaller. It's to help your core work better.

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Your Body Is Not Broken.

Diastasis recti does not mean your body is broken or incapable of becoming stronger. Your rehabilitation should focus on understanding your individual presentation and helping you return to the activities you enjoy.

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If you are experiencing diastasis recti, abdominal doming, pelvic pressure, or difficulty managing pressure during exercise, consider scheduling an evaluation with a pelvic health physical therapist who specializes in pelvic health dysfunction and Low Pressure Fitness.

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Your body may not need to be “fixed.” Rather it may need the right combination of support, movement, breathing, and time to learn how to work together again.

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Contact us at Activcore Physical Therapy to get started now.

Dr. Ashlea Lytle

Regional VP | Physical Therapist
Ashlea Lytle is a Doctor of Physical Therapy (DPT) who has been practicing for over a decade in the Denver area. She specializes in orthopedics and pelvic health for adults and kids. She primarily works at Activcore in Castle Rock, Colorado.
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