Why Your Bloating Might Be a Coordination Problem — Not a Diet Problem

If your stomach looks flat in the morning and dramatically distended by evening — even though you haven’t eaten much, and every test has come back “normal” — you may be dealing with abdominophrenic dyssynergia (APD). It’s a real, physical condition, and it responds well to conservative, non-invasive treatment.

What Is APD?

Normally, when you eat, your diaphragm relaxes upward and your abdominal wall gently firms to accommodate digestion. In APD, that pattern reverses: the diaphragm descends and contracts while the abdominal wall relaxes outward, pushing pressure forward into the belly. The result is visible distension — often without any real increase in intestinal gas.

This is a motor coordination issue between the diaphragm, abdominal wall, and pelvic floor, not a willpower problem, and not something caused simply by stress.

APD frequently overlaps with constipation, IBS, functional dyspepsia, and pelvic floor dysfunction — which is exactly why treating it well requires more than one type of clinician.

Why “Just Eat Differently” Often Falls Short

Many patients are told to cut foods, try probiotics, or “manage stress” before anyone identifies the coordination pattern underneath. The American Gastroenterological Association’s own clinical guidance notes that probiotics aren’t recommended for bloating and distension, and that dietary restriction should be supervised — not open-ended. If the driver is a movement pattern rather than gas volume, diet changes alone will always underperform.

The Evidence for a Movement-Based Approach

A randomized, placebo-controlled trial (Barba et al., Gastroenterology, 2024) trained patients using real-time biofeedback to consciously reverse the APD pattern — lifting the lower rib cage while gently drawing the abdominal wall in — and found meaningful reductions in the abnormal movement pattern and visible distension. This built on earlier biofeedback research from the same group going back to 2015. It’s the strongest evidence yet that APD is trainable.

Target APD Head On

APD Works Best as a Multidisciplinary Effort

No single discipline treats every layer of this condition alone — which is exactly why a coordinated, conservative plan outperforms a single fix.

The Bottom Line

If you’ve been told your bloating is “just stress” or “just IBS” without anyone assessing how your diaphragm and abdominal wall move together, it may be worth asking your gastroenterologist for a physical therapy referral. APD is treatable — and the first-line treatment is safe, evidence-based, and doesn’t require medication or surgery.