身体活动和睡眠对中老年人腰背痛的独立和联合影响研究

Background??Low back painLBPin middle-aged and elderly adults has become a significant public health issue worldwide. Physical activity and sleep are two core components of the 24-hour lifecycleand maintaining adequate physical activity and good sleep are crucial for healthboth of which are associated with LBP. Objective??To investigate the prevalence of LBP in middle-aged and elderly adults in Chinaanalyze the independent and combined effects of physical activity and sleep on its occurrenceand provide scientific evidence for behavioral health. Methods??Based on the 2018 China Health and Retirement Longitudinal Studyparticipants without demographicphysical activitysleepand LBP data were excluded. A total of 13 496 eligible individuals aged 45 to 69 were includedand their demographic and behavioral information was collected. Binary logistic regression and multiple linear regression were used to examine the relationship between physical activitysleep durationand LBPand a mediation model was constructed to analyze the mediating effect of sleep duration on the association between physical activity and LBP. Results??The prevalence of LBP among the 13496 participants was 39.0%n=5 269.Inadequate sleep<7 hourswas reported by 57.1%n=7 704of middle-aged and elderly adults in Chinawith 11.6%n=1561engaging in mild physical activity and 88.4%n=11 935engaging in moderate to high-intensity physical activity. The multicollinearity diagnosis results for confounding variablese.g.genderagealcohol consumptionand smoking showed that all variance inflation factors were less than 5indicating no collinearity. Regression analysis revealed a positive correlation between physical activity and LBP=0.120P<0.05a negative correlation between sleep duration and LBP=-0.220P<0.01and a negative correlation between physical activity and sleep duration=-0.081P1.96and the path from physical activity to LBP was not significant=0.105P>0.05suggesting a complete mediating effect of sleep duration on the association between physical activity and LBP. Conclusion??Over one-third of middle-aged and elderly adults in China suffer from LBP. Higher levels of physical activity or shorter sleep duration are associated with increased risk of LBP. Sleep duration plays a complete mediating role in the association between physical activity and LBPwhere the increased risk of LBP associated with high-intensity physical activity is completely transmitted through reduced sleep duration. Adequate sleep duration plays an important role in reducing the risk of LBP associated with high-intensity physical activity. This study suggests that older adults should adjust their exercise intensity according to their own conditions and maintain adequate sleep duration to reduce the risk of LBP.