Researchers have uncovered a possible connection between marathon running and colorectal cancer, finding that athletes who regularly participate in long-distance events may be at higher risk of developing potentially dangerous adenomas – precursor lesions that can turn into cancer. A study conducted by oncologists at the Inova Schar Cancer Institute found that runners had a much higher rate of adenomas than would be expected for their age.
The study, which examined 100 endurance athletes between the ages of 35 and 50 who had participated in multiple marathons or ultramarathons, revealed that nearly half of the participants had polyps in their colon. This is significantly higher than the expected rate for this age group, sparking concerns about a potential link between extreme physical activity and an increased risk of colorectal cancer.
While the findings are preliminary and require further confirmation, they may indicate a real connection between marathon running and the development of adenomas. The researchers speculate that regular experience of blood flow loss to the intestines, which can cause gastrointestinal distress, may contribute to chronic inflammation that increases the risk of cancer.
However, it is essential to note that the study does not definitively prove a causal link between endurance running and colorectal cancer. Further research is needed to confirm these findings and understand the underlying causes and risk factors involved. Nevertheless, the benefits of regular physical activity, which include a lower risk of certain types of cancer, far outweigh the potential risks for most people.
Source: https://gizmodo.com/researchers-find-strange-link-between-marathon-running-and-cancer-2000645052