The Hidden Signal at the End of a Bathroom Trip

We tend to judge a bowel movement by what comes out. This 2025 study looked instead at the quiet moment afterward — and found it carries its own meaningful signal about how the gut and pelvic floor are working.

What they found

The researchers defined and measured eu-tenesmus: the time between the last stool passing and finishing up the trip to the bathroom. Across roughly 200 healthy adults, this interval averaged about 75 seconds but ranged enormously — from just a few seconds to over five minutes.

Two findings stand out. First, there was a clear difference between sexes, with women showing a longer average interval than men. Second, and most importantly, eu-tenesmus showed no correlation with stool consistency — it had nothing to do with whether the stool was hard, soft, or somewhere in between.

“The metric captures an aspect of defecation that is invisible to traditional Bristol Stool Form Scale assessment, suggesting independent diagnostic value for pelvic floor and sensory function.”

That independence is the whole point. Because it doesn’t track with stool shape, eu-tenesmus appears to reflect a different layer of gut function altogether — how the rectum senses its contents and how well the pelvic-floor muscles coordinate the finish. Longer intervals may, in some cases, hint at incomplete emptying or pelvic-floor issues, though the researchers stress the measure needs context to interpret.

Why it matters

For decades, stool form has been the go-to lens on bowel health. This work suggests there’s a second, complementary dimension hiding in plain sight: the sense of completeness. Capturing it could one day help flag pelvic-floor and rectal-sensation problems that stool charts simply can’t see — a reminder that gut health is richer and more multidimensional than any single measurement.