Researchers have discovered a strange link between the marathon and colorectal cancer

Symbol of endurance and vitality, the marathon could however have an unknown setback. However, Researchers from the SCHAN Cancer Institute inova researchers. In addition, located in Virginia (United States), have observed in a study that long distances on foot runs more often present precancerous polyps than the general population of the same age. Furthermore, Long considered as protection against chronic diseases. Moreover, the intensive endurance race raises questions when it goes beyond the physiological limits of the body.

According to the Gizmodo online media. the group of scientists relied on the analysis of the hins of 100 athletes aged 35 to 50. All are used to running marathons or ultramarathons and none of them has a family history related to colorectal cancer. The results are striking: while only 1.2% of average risks at the medium normally have advanced tumors, this figure increases to researchers have discovered strange link 15% in these endurance athletes.

Half of the participants had Benin type polyps, but always likely to evolve. This proportion, which is far superior to historical tendencies, has aroused strong reactions from scientists. “We did not expect such tumors at high risk. which are precancerous lesions, in an age group like this ”recognized David Lieberman, gastroenterologist at the University of Health and Oregon Sciences, interviewed by the daily The New York Times.

No certainties yet – Researchers have discovered strange link

Timothy Cannon. a researcher at the SCHAN CANCER Institute inova, was himself alerted researchers have discovered strange link after having followed three ultramarathonic patients with colorectal cancer, the oldest of whom was only 40 years old. Figures that question, especially since systematic screening is generally recommended only from the age of 50.

Scientists are advancing the idea that the extreme constraints of endurance – notably the reduction of blood flow to the intestines – could promote chronic inflammation. thus creating a terrain conducive to cancer. But they remain cautious. their work, presented in June in Chicago at the annual conference of the American Society of Clinical Oncology, not yet validated by the scientific rereading of their peers.

Pending confirmation. specialists recommend reinforced medical follow -up for intensive runners, without questioning the proven benefits of regular physical activity, associated with a drop in the risk of at least eight different cancers. However, this study invites us to question the border between beneficial sport and excess endurance. In health, researchers recall, performance researchers have discovered strange link should never take precedence over balance.