Is "colorectal cancer" rising in "young people"?

Re:Is "colorectal cancer" rising in "young people"? by scrollop on Tuesday May 26, 2026 @01:59PM (#48283320)

Also increased, or we're now aware of, higher rates in long distance runners.

[ Parent | on HN ]

Re:Is "colorectal cancer" rising in "young people"? by adaml_623 on Tuesday May 26, 2026 @02:05PM (#48283400)

I'd love to know the causation for that correlation

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Re:Is "colorectal cancer" rising in "young people"? by elric on Tuesday May 26, 2026 @02:43PM (#48284004)

There was some discussion about this on HN recently. Supposedly something to do with less blood going to the bowels during prolonged exercise. Apparently the risk was largest in people who ran 5+ marathons.

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Re:Is "colorectal cancer" rising in "young people"? by nradov on Tuesday May 26, 2026 @02:48PM (#48284097)

No one knows for sure. One hypothesis is chronic inflammation, perhaps linked to diet or mechanical stress.

[ Parent | on HN ]

Re:Is "colorectal cancer" rising in "young people"? by array_key_first on Wednesday May 27, 2026 @12:14PM (#48296457)

My understanding is that exercise lowers chronic inflammation. Basically, you trade off acute inflammation during the exercise itself for less inflammation when you're not exercising. But, maybe long distance running is too long or something.

[ Parent | on HN ]

Re:Is "colorectal cancer" rising in "young people"? by saladdays on Tuesday May 26, 2026 @02:07PM (#48283440)

Perhaps higher sugar consumption from fueling techniques?

[ Parent | on HN ]