Constipation Is a Motility Problem
If you are struggling with constipation, you have probably been told to “Eat more fiber” or “Drink more water”, but many people try that and still don’t feel better.
That’s because constipation is often not about what you’re eating. It’s about how your gut is moving.
What Is Gut Motility?
Motility is the process that moves food through your digestive system. It’s controlled by the nervous system, muscle contractions, and hormonal and metabolic signals; any disruption to this may lead to chronic constipation.
When motility is working well:
Food moves efficiently
Waste is eliminated regularly
When it slows down:
Stool sits longer in the colon
Water is reabsorbed
Bowel movements become harder and less frequent
Why Motility Slows Down
Motility doesn’t slow down randomly, there is always a reason.
Nervous System Dysregulation (Chronic Stress = Slower Motility) - Your body can’t prioritize digestion when it’s in a constant stress response. When “fight or flight” is active blood flow shifts away from digestion and gut movement slows.
Disrupted Migrating Motor Complex (MMC) - Between meals, your body runs a “cleansing wave” called the migrating motor complex (MMC), its job is to sweep bacteria and debris through the small intestine. If impaired, the movement slows, and bacteria builds up - a key factor in both constipation and SIBO.
Methane-Producing Microbes - Certain microbes produce methane gas (see SIBO post). Methane has been shown to slow intestinal movement leading to constipation, bloating, and often times food intolerances/sensitivities.
Thyroid & Metabolic Function - Your metabolism influences how quickly your body moves, including digestion, which means low thyroid function can lead to reduced motility and constipation.
Electrolytes & Muscle Function - Motility, like other muscles in the body, depends on contractions in order to maintain a healthy regular bowel movement. If muscle contractions weaken or movement slows, key nutrients may be missing from the diet or not being absorbed properly, such as magnesium, potassium, and sodium.
Disrupted Daily Rhythms - Your gut follows a rhythm, and motility is influenced by that rhythm. Irregular patterns of sleep, meal timing, and routines can disrupt natural bowel movements.
Why Fiber Isn’t the Full Answer
Fiber can support bowel movements, but it does not fix motility. If movement is already slow fiber may increase bulk, but not movement which can lead to more bloating and discomfort.
Without motility, adding more fiber is like adding cars to a traffic jam.
An Integrative Approach to Motility
At Sun Valley Natural Medicine, we approach constipation differently. Instead of asking: “How much fiber are you eating?” we ask: “What’s slowing your system down?”
Our Approach
Constipation is often a motility issue, and motility can be supported… let’s figure out why this is happening and get to the root cause of the issue. Our goal is to restore natural, consistent movement, not just get you to ‘go more often’.
Evaluating motility patterns
Assessing for SIBO (especially methane)
Supporting the nervous system
Optimizing digestion and gut signaling
Addressing nutrient deficiencies
Your body is designed to move and eliminate efficiently, when it’s not, there is a reason, once we discover that reason that is when things truly start to shift.