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BACKGROUND: Constipation is a very common medical issue among the general population worldwide. However, the association between exercise habits and constipation is still not fully understood. Additionally, no evidence regarding the association between exercise partners and constipation exists. This study aimed to evaluate this issue in a young Japanese population, taking the presence or absence of an exercise partner as an additional variable. METHODS: The study subjects consisted of 12,497 Japanese university students. Information on constipation, exercise frequency, exercise intensity, and exercise partners was obtained through a self-administered questionnaire. Constipation was defined as present if a student answered "Yes" to the question, "Have you been constipated often recently?" RESULTS: The prevalence of self-reported constipation was 6.5%. Frequency and intensity of exercise were independently inversely associated with constipation. After adjustment for age, body mass index, drinking, smoking, anemia, and sports injury, exercise with groups and friends was independently inversely associated with constipation (groups: adjusted odds ratio (OR) - 0.70 (95% confidence interval (CI): 0.53-0.90), friends: adjusted OR - 0.56 (95% CI: 0.42-0.74)). After further adjustment by adding intensity and frequency of exercise to confounding factors, only the association between exercise with friends and constipation was still significant (adjusted OR: 0.61 (95% CI: 0.39-0.96)). CONCLUSIONS: In this young Japanese population, the frequency and the intensity of exercise and the presence of exercise partners might be independently inversely associated with self-reported constipation. Exercising, especially exercising with others, may have a preventive effect on constipation, and opportunities to exercise with others should be provided.

DOI： 10.7759/cureus.74455

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BACKGROUND/AIMS: Although certain allergic diseases have been reported to be associated with the prevalence of functional dyspepsia (FD) and irritable bowel syndrome (IBS), it is unclear whether the presence of multiple allergic diseases further increases the prevalence of FD and IBS. The aim of this study is to determine this issue in young people. METHODS: A cohort of 8923 Japanese university students was enrolled and diagnoses of FD and IBS were confirmed using Rome III criteria. Allergic disorders diagnosed at medical institutions were obtained by means of a self-administered questionnaire. RESULTS: The prevalence of FD, IBS, and their overlap was found to be 1.9%, 6.5%, and 1.1%, respectively. Pollen allergy was independently positively correlated with FD, IBS, and overlap of FD and IBS. Allergic rhinitis was positively linked to IBS. Drug allergy was positively associated with FD. The presence of multiple allergic diseases was positively correlated with FD and IBS (FD: adjusted OR for 2 allergic diseases: 1.95 [95% CI, 1.24-2.98], P for trend = 0.003; and IBS: adjusted OR for 1 allergic disease: 1.40 [95% CI, 1.15-1.69], 2 allergic diseases 1.47 [95% CI, 1.12-1.91], and 3 or more allergic diseases: 2.22 [95% CI, 1.45-3.28], P for trend = 0.001). Additionally, the concomitant existence of multiple allergic diseases was also demonstrated to have a trend that correlated with the overlap of FD and IBS (P for trend = 0.018). CONCLUSION: Allergic disease multimorbidity is positively correlated with the prevalence of FD and IBS in a young population.

DOI： 10.5056/jnm23015

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INTRODUCTION: There is evidence regarding the association between dysmenorrhea and irritable bowel syndrome (IBS), although it is lacking in the Asian population. Therefore, the purpose of this study was to investigate the association between menstrual status and IBS in a young Japanese. METHODS: Overall, 4693 female college students were included in the analysis of this study. Information regarding lifestyle habits, menstrual status (irregularity, pain severity, and medication), and IBS (Rome III criteria) was obtained using a self-reported questionnaire. Age, body mass index, exercise habits, smoking, drinking habits, and anemia were analyzed as potential confounders. RESULTS: The prevalence of IBS was 6.1%. Moderate (adjusted odds ratio [OR]: 1.89 [95% confidence interval (CI): 1.27-2.91]) and heavy (adjusted OR: 2.14 [95% CI: 1.42-3.45]) menstrual pain was independently positively associated with IBS (p for trend = 0.001). Using medication sometimes (adjusted OR: 1.41 [95% CI: 1.09-1.84]) and often (adjusted OR: 1.60 [95% CI: 1.13-2.24]) was independently positively associated with IBS. There was no association between menstrual cycle and IBS. In subjects without functional dyspepsia, irregular menstrual cycle was independently positively associated with IBS. CONCLUSION: In the young Japanese population, menstrual pain and medications for menstrual pain may have a significant positive association with IBS.

DOI： 10.1159/000533264

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OBJECTIVE: Evidence regarding the association between exercise habits and irritable bowel syndrome (IBS) remains scarce in a young population. It is also unknown whether the existence of an exercise partner affects this issue. The purpose of this study was to explore the association between exercise habits that include an exercise partner and IBS in a young Japanese population. METHODS: This study enrolled 8923 Japanese university students and examined exercise frequency and intensity, and exercise partners using self-administered questionnaires. IBS and functional dyspepsia were defined according to the Rome III criteria. RESULTS: The prevalence of IBS in this survey was 6.5%. Moderate frequency exercise was inversely related with IBS [adjusted odds ratio (aOR): 0.65 (95% confidence interval, CI: 0.51-0.83), P for trend = 0.005]. Moderate and high exercise intensities were independently and inversely related with IBS, respectively [aORs were moderate: 0.76 (95% CI: 0.61-0.95) and high: 0.62 (95% CI: 0.48-0.78), P for trend = 0.001]. Exercising with a group or with friends instead of alone was independently inversely related with IBS [aOR with groups: 0.53 (95% CI: 0.40-0.70) and with friends: aOR 0.71 (95% CI: 0.54-0.93)]. After excluding subjects with overlapping IBS and functional dyspepsia, an inverse association between high intensity of exercise or exercise in a group and IBS remained significant. CONCLUSION: The frequency and intensity of exercise may be independently inversely related with IBS in a young Japanese population. Also, exercise with others may be important for preventing IBS.

DOI： 10.1097/MEG.0000000000002561

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