#Enduranceathletes

A surprising signal is emerging from the world of extreme endurance: among a group of long-distance runners, a notable share showed precancerous growths in the colon. At a major cancer conference, researchers reported that in a small, carefully selected group of marathon and ultramarathon runners aged 35 to 50, about 15% had advanced adenomas—lesions that can progress to colorectal cancer—while 41% had at least one adenoma. The study is early, limited in size, and not yet peer-reviewed, but its implications are drawing attention worldwide, including in Thailand where endurance sports are popular and family-centered health decisions are common.