Irritable bowel syndrome (IBS) is a common bowel disorder that manifests as unexplained abdominal pain or discomfort and bowel habit changes in the form of diarrhea, constipation, or alternating patterns of the two. Some evidences demonstrate that increased physical activity improves IBS symptoms. Hence, daily exercise is recommended in these patients. In this study, we aimed to investigate the relationship between physical activity and gastrointestinal symptoms in 101 university students (female = 78) with IBS. Participants were examined by Gastrointestinal Symptoms Rating Scale (GSRS), and gait steps were measured for 1 week using a pedometer. The association between the GSRS score and pedometer counts was determined by ordinal logistic modeling analysis. The ordinal logistic regression model for GSRS and locomotor activity showed a significant stepwise fit (z = -3.05, p = 0.002). The logistic curve separated GSRS score of 5 points (moderately severe discomfort) from 2 points (minor discomfort) by locomotor activity. The probability for daily locomotor activity to discriminate between 5 and 4 points of GSRS (i.e., likely to have reverse symptoms) decreased in accordance with increment of steps per day: 78% probability for 4000 steps, 70% probability for 6000 steps, 59% probability for 8000 steps, and 48% probability for 10000 steps. This study demonstrated that the severity of GSRS is associated with the amount of walking in younger people with IBS. These results may be used as a measure to determine the daily step count to reduce the severity of gastrointestinal symptoms in individuals with IBS.

肠易激综合症（IBS）是一种常见的肠病，表现为无法解释的腹痛或不适，并且肠胃习惯的改变以腹泻，便秘或二者交替的形式出现。一些证据表明，增加体育锻炼可以改善IBS症状。因此，建议这些患者进行日常锻炼。在这项研究中，我们旨在调查101名IBS大学生的体育活动与胃肠道症状之间的关系。通过胃肠道症状评定量表（GSRS）检查参与者，并使用计步器测量步态步伐1周。GSRS得分与计步器计数之间的关联通过顺序逻辑模型分析确定。p = 0.002）。逻辑曲线通过运动活动将GSRS评分从5分（中度严重不适）与2分（轻度不适）分开。每天运动活动区分GSRS的5到4点（即，可能具有逆向症状）的可能性随着每天步数的增加而降低：4000步的概率为78％，6000步的概率为70％，59％概率为8000步，而48％的概率为10000步。这项研究表明，GSRS的严重程度与IBS年轻人的步行量有关。这些结果可以用作确定每日步数的措施，以减少IBS患者胃肠道症状的严重程度。