Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Gastrointestinal complaints in runners are not due to small intestinal bacterial overgrowth | Schommer et al. Journal of Negative Results in BioMedicine 2011 10 8 http content 10 1 8 r M 1 JOURNAL OF NEGATIVE RESULTS IN BIOMEDICINE BRIEF REPORT Open Access Gastrointestinal complaints in runners are not due to small intestinal bacterial overgrowth Kai Schommer1 Dejan Reljic1 Peter Bartsch1 and Peter Sauer2 Abstract Background Gastrointestinal complaints are common among long distance runners. We hypothesised that small intestinal bacterial overgrowth SIBO is present in long distance runners frequently afflicted with gastrointestinal complaints. Findings Seven long distance runners 5 female mean age years with gastrointestinal complaints during and immediately after exercise without known gastrointestinal diseases performed Glucose hydrogen breath tests for detection of SIBO one week after a lactose hydrogen breath test checking for lactose intolerance. The most frequent symptoms were diarrhea 5 7 71 and flatulence 6 7 86 . The study was conducted at a laboratory. In none of the subjects a pathological hydrogen production was observed after the intake of glucose. Only in one athlete a pathological hydrogen production was measured after the intake of lactose suggesting lactose intolerance. Conclusions Gastrointestinal disorders in the examined long distance runners were not associated with small intestinal bacterial overgrowth. Introduction Gastrointestinal GI disturbances during or immediately after exercise are common among runners 1 2 . 20-50 of long distance runners are affected 3 . Both the upper and lower GI tract are involved. Symptoms are vomiting nausea bloating heartburn and flatulence as well as watery and bloody diarrhea and anal incontinence 4 . The causative mechanisms are not completely understood. The mechanical irritation of the GI tract during running can change intestinal motility 5 additionally exercise causes a reduction of the mesenteric blood flow 6 and both may contribute to the symptoms. Both a GI dysmotility as well
