Health
Marathon Running Linked to Colon Cancer Risk
Health Points
- Recent research found more early colon cancer signs in marathon runners than in typical adults.
- Experts say endurance running may stress the gut, but stress the need for more research before drawing conclusions.
- Doctors recommend staying active while keeping up with regular colon cancer screenings.
New findings suggest dedicated distance runners may face a higher risk for colon cancer than previously thought, with a significant number showing early warning signs.
Researchers believe factors such as reduced blood flow to the digestive tract and changes in gut bacteria during long runs could play a role, but they emphasize additional studies are needed.
“I would hate to deter people from running, or starting to run or even jog, as a result of this study. That would be unfair to running.”
While the study found precancerous polyps in 15% of experienced marathoners, experts caution the sample was small, and it’s unclear if running itself is the main factor.
For now, specialists encourage everyone to maintain their exercise routines and prioritize regular health screenings, especially if running long distances.
Staying active remains one of the best ways to support overall health as you age—just be sure to keep up with checkups and listen to your body.