Data Sheet 1_Exploring the relationship between occupational stress, physical activity and sedentary behavior using the Job-Demand-Control Model.docx

ObjectivesTo study the relationship between the occupational stress model, specifically the Job Demand-Control Model of Karasek, physical activity level and sedentary behavior. MethodThis is a cross-sectional, observational, descriptive study. A self-administered questionnaire was distributed to 100 volunteers working at Clermont Auvergne University. The questionnaire included the Karasek questionnaire and the International Physical Activity Questionnaire. ResultsThe results reveal that occupational characteristics play a significant role, with individuals exhibiting high job control showing reduced sitting time and increased physical activity compared to those with low job control. Job strain was associated with increased sitting time and decreased physical activity. Further analysis revealed that being in a state of job strain significantly predicted sitting for more than 7 h per day. Similarly, job strain and isostrain were explanatory factors for having a low to moderate physical activity level. Logistic regression quantified the risks, indicating that sitting for more than 7 h per day increased the risk of job strain by 4.80 times, while high physical activity levels and being male reduced the risk by 79 and 84%, respectively. Job strain also increased the risk of prolonged sitting by 5.06 times and low to moderate physical activity levels by 5.15 times. Additionally, mediation analysis revealed that a substantial portion of the association between sitting time and job strain was mediated by physical activity, and vice versa, emphasizing the interconnected nature of sedentary behavior and physical activity in influencing occupational stress. ConclusionThe study highlights the impact of sedentary behavior on occupational stress, assessed using Karasek’s Job-Demand-Control Model. Despite being less studied, sedentary behavior appears to be a relevant contributor to occupational stress. Furthermore, the results emphasize the significant role of physical activity levels, suggesting that it plays a substantial part in the relationship between sedentary behavior and occupational stress.研究目的：探究职业压力模型——具体为卡拉塞克（Karasek）工作需求-控制模型（Job Demand-Control Model）——与身体活动水平、久坐行为之间的关联。 研究方法：本研究为横断面观察性描述研究。向克莱蒙奥弗涅大学（Clermont Auvergne University）的100名在职志愿者发放自填式问卷，问卷包含卡拉塞克工作问卷（Karasek questionnaire）与国际身体活动问卷（International Physical Activity Questionnaire）。 研究结果：结果表明，职业特征发挥着显著作用：与工作控制感较低的个体相比，工作控制感较高者的久坐时间更短、身体活动水平更高。工作紧张（job strain）与更长的久坐时间及更低的身体活动水平存在关联。进一步分析显示，处于工作紧张状态可显著预测每日久坐时长超过7小时。同样，工作紧张与同型紧张（isostrain）是导致身体活动水平处于低至中等程度的影响因素。逻辑回归分析对风险进行了量化：每日久坐超过7小时会使工作紧张的风险提升4.80倍，而较高的身体活动水平与男性身份则分别使风险降低79%与84%。此外，工作紧张还会使长时间久坐的风险提升5.06倍，使身体活动水平处于低至中等程度的风险提升5.15倍。中介分析进一步揭示，久坐时间与工作紧张之间的关联有相当一部分由身体活动所介导，反之亦然，这凸显了久坐行为与身体活动在影响职业压力方面的相互关联性。 研究结论：本研究着重阐明了基于卡拉塞克工作需求-控制模型评估的久坐行为对职业压力的影响。尽管相关研究尚少，但久坐行为似乎是职业压力的重要贡献因素。此外，研究结果强调了身体活动水平的关键作用，表明其在久坐行为与职业压力的关联中发挥着实质性影响。