The housekeeper wave
A brief burst of strong, rhythmic contractions travels down the upper gut. This is the MMC’s most recognisable phase.
Minutes of vigorous activity complete a much longer cycle.Visual field guide 06Gut motility
Your gut has a
shift that starts
between meals.
When digestion settles, a repeating pattern of contractions moves through the stomach and small intestine. It is called the migrating motor complex—or MMC.
Follow one cycle ↓A clear, 5-minute visual guide
FASTING WINDOW≈ 90–130minutes per cycle, with wide variation
THE CENTRAL IDEAThe MMC is a fasting pattern—not your normal movement while a meal is being digested.
ONE REPEATING CYCLEQuiet. Stir.
Quiet. Stir.
Then sweep.
The MMC is often described in three phases. Some researchers split the brief transition after the sweep into a fourth phase.
MMC ≠ PERISTALSISA named fasting pattern, not every gut contraction.
Peristalsis is the broad process that propels contents. The MMC is one specific, cyclic pattern of motility seen between periods of digestion.
THE MODE SWITCHA meal changes
A meal changes
the assignment.
Eating interrupts the fasting pattern and replaces it with contractions suited to mixing, digesting and absorbing a meal.
Pause + sweep
Once the digestive response fades, the interdigestive pattern returns and cycles until food arrives again.
Food interrupts the MMC. That is normal physiology.
It does not mean that snacks are “bad,” or that every person should force long fasting windows. Meal timing must fit nutrition needs, medications, pregnancy, diabetes, eating-disorder history and individual symptoms.
THE SIBO CONNECTIONA protective current,
A protective current,
not a single cause.
Forward movement helps limit what remains in the upper gut. When motility is impaired, stasis can make bacterial overgrowth more likely—but SIBO is multifactorial.
→
Less opportunity to linger
Contractions, secretions and anatomy work together to move residue and microbes downstream.
versus
…
More opportunity to accumulate
Stasis is one risk pathway. It does not tell us which microbes are present or prove that symptoms are caused by SIBO.
The MMC occurs during fasting and is interrupted by feeding.
Disturbed motility is associated with bacterial overgrowth in some disorders.
Symptoms alone can reveal your MMC—or a rigid meal gap will cure SIBO.
IN PRACTICESupport the system.
Support the system.
Don’t micromanage it.
The MMC runs automatically. There is no home sensation, wearable or stopwatch that reliably confirms a “complete sweep.”
Keep the basics sturdy
Regular movement, adequate food and fluid, sleep, and treatment of constipation support gut function more broadly.
Use meal spacing carefully
Some clinicians trial fewer grazing episodes in selected patients, but evidence does not support a universal three-, four- or five-hour rule.
Look for the bottleneck
Diabetes, connective-tissue disease, surgery, obstruction and some medicines can impair motility and deserve clinical attention.
Be cautious with prokinetics
Motility medicines have different targets, benefits and risks. They are not interchangeable “MMC boosters” and should be clinician-guided.
GET MEDICAL HELPPersistent vomiting, severe or escalating pain, marked distension, dehydration, blood in stool, fever, or inability to pass stool or gas need prompt assessment.
SOURCESEvidence behind