Matthew McConaughey Praises the Morning Poop. Waking Triples Colon Activity.

A camera, a MetroCard microphone and a moving train: that is the whole set of SubwayTakes, and on Tuesday the take on it was Matthew McConaughey’s. “The most underrated part of a good day is dropping a good deuce in the AM,” he told host Kareem Rahma. We read the show’s own posts of the episode and the transcript published the same afternoon, then opened the colon research, because the actor’s theory makes a testable claim: that the morning is when the gut does its best work.

It turns out to be one of the better-measured facts in digestion. Below: what McConaughey said, what sensors inside the colon record when a person wakes up, and what a survey of nearly 1,900 adults found about who actually keeps a morning schedule, which is fewer people than his take suggests.

The take: McConaughey made the case for the digestive system, out loud, on a train

The SubwayTakes channel posted the full conversation, “Matthew McConaughey Defends His 5 Most Controversial Takes”, at 13:00 UTC on October 27, 2026, and the bathroom clip an hour later under the take itself as its title. The longer lines come from the episode as transcribed by People that afternoon. “We don’t give enough credit — maybe it’s taboo to talk about. The credit we’ve got to give the digestive system,” McConaughey said. “People got to call it something else so people can talk about it easier, but it’s such an important part of the day.”

He also put it on the list of things to weigh when choosing where to live, next to the climate: “How’s your digestive system work? Put that on your top 10 list of where you want to live.” The half-inch and the eye colour are comedy, and he delivered them that way. The rest of the take, that the first bowel movement “sets the tone for the rest of the day,” as he put it, is closer to physiology than it sounds.

The alarm clock: Waking up triples what the colon does, in sensor studies

The cleanest measurement comes from the University of Iowa. In a 2001 study in the American Journal of Physiology, Satish Rao and colleagues placed a six-sensor pressure probe in the colons of 25 healthy adults and let them walk around, sleep and eat normal meals for a day, 528 hours of recording in all. The colon was quietest at night. In the paper’s words, “Waking induced a threefold increase in motility, whereas meals induced a twofold increase” (PMID 11254489).

The Iowa team also logged the colon’s strongest movement, a long, high-pressure squeeze that travels down the bowel and pushes contents toward the exit. Every participant had them, about 10 a day on average, and they came “mostly after waking, after meals, or with defecation.” A 2005 review of colon motility by Gabrio Bassotti’s group at the University of Perugia reached the same picture across the field: colonic activity is “maximal during the day, especially after waking and following meals” (PMID 15884105).

Put the two triggers together and the morning makes sense. Getting up switches the colon on; breakfast, and for many people a coffee, adds a second push on top of it (our coffee explainer, why coffee makes you poop, has the numbers on that one). That is the stack McConaughey is describing when he says everything starts to work.

The clock on the wall: Most bowel movements happen in the early morning, but most people are not regular

The timing has been counted, too. In a 1992 study in the journal Gut, Ken Heaton’s team at the Bristol Royal Infirmary surveyed a random sample of 838 men and 1,059 women in East Bristol, and most kept a written record of three bowel movements in a row. “Most defecations occurred in the early morning,” the paper reports, “and earlier in men than in women” (PMID 1624166).

Here is where the research is gentler than the take. Once a day was the single most common habit in Bristol, but it was a minority practice: a regular 24-hour rhythm showed up in only 40% of men and 33% of women, and a third of the women went less often than daily. Our reading: a good deuce in the AM is the most common pattern, not the healthy one, and a day that starts without one is an ordinary day. Our guide to how often you should poop covers the normal range in full.

The 72nd hour: Why the actor’s worst days are travel days

McConaughey told Rahma he had flown in from the West Coast, had not slept well and had not yet made his visit that morning. Then he described the version every frequent flyer knows: “24 hours went by, 48 hours went by” after a long trip, and the feeling that “the world’s not getting the best of me, and I know exactly why.”

The Iowa numbers explain why travel hits the schedule. If waking and meals are the colon’s two biggest switches, a red-eye that scrambles when you sleep, wake and eat moves both of them at once. Our reading: hours of sitting, less water and unfamiliar bathrooms only add to it. Our explainer on travel constipation has the practical side: keep meal times close to home time, drink water on the plane and walk when you land.

The fiber concept: Rahma’s advice was the part almost nobody follows

The host had his own take on the subject: he told McConaughey that he, like a lot of people, needs to eat more fiber as he gets older, and the actor agreed. “I understand the fiber concept,” McConaughey said. Most Americans do not act on it. The federal Dietary Guidelines for Americans 2020-2025 state that “more than 90 percent of women and 97 percent of men do not meet recommended intakes for dietary fiber” (USDA and HHS, page 114). Fiber gives stool its bulk and holds water in it, and that bulk is what those morning contractions have to move. Our guide to soluble and insoluble fiber sorts out which kind does what.

So the take holds up, with one edit. The colon really does run on a morning schedule, roughly three times busier on waking than in sleep, and breakfast adds to it. What the research would add to McConaughey’s line is that a regular rhythm, whatever the hour, matters more than hitting the AM slot, and that fewer than half of people keep a once-a-day rhythm at all.

How we checked this: Sources and method

The take and its date come from the SubwayTakes channel’s own posts on YouTube and Threads on October 27, 2026 (the clip and the full episode). The longer quotes are from the episode as transcribed by People in Tommy McArdle’s article of October 27, 2026; we did not add to or alter them. The colon motility figures are from Rao et al., American Journal of Physiology: Gastrointestinal and Liver Physiology, 2001 (PMID 11254489), and the review by Bassotti et al., World Journal of Gastroenterology, 2005 (PMID 15884105); the timing and regularity figures are from Heaton et al., Gut, 1992 (PMID 1624166); the fiber figure is from the Dietary Guidelines for Americans 2020-2025. Each PubMed record was matched to its paper title before citing. The 1,897 total is our arithmetic. McConaughey described his own habits for comedy; nothing here is a statement about his health. This article is educational, describes what the cited sources say, and is not medical advice.