Stress is an important consideration for understanding why individuals take part in limited or no physical activity. The negative effects of stress on physical activity do not hold for everyone, so examinations of possible resilience resources that might protect individuals from the harmful effects of stress are required. Accordingly, we conducted a measurement-burst study with 53 university students over a 6-month period to examine the dynamics among stress, physical activity, sedentary behavior, and resilience resources. Participants completed three bursts of 6 days, with each burst separated by an 8-week gap. Expectations regarding the moderating effects of resilience resources were unsupported. Daily reports of academic and general stress were positively associated with sedentary behavior and negatively associated with light and moderate intensity physical activity. Hair cortisol concentration significantly moderated the association between academic stress and sedentary behavior, such that in bursts where cortisol was lower the daily positive association between stress and sedentary behavior was weaker. The finding that academic and general stress are dynamically associated with lower levels of light and moderate intensity physical activity and higher levels of sedentary behavior is an important extension to previous research, which has relied mainly on cross-sectional designs and self-report methods. Future research might examine resilience resources that are specific to the outcomes of interest rather than rely on generic resources.

中文翻译：

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压力、身体活动、久坐行为和恢复力——压力升高的自然时期的影响：一项测量突发研究

压力是理解为什么个人参加有限或不参加体育活动的重要考虑因素。压力对身体活动的负面影响并不适用于每个人，因此需要检查可能保护个人免受压力有害影响的弹性资源。因此，我们在为期 6 个月的时间内对 53 名大学生进行了一项测量爆发式研究，以检查压力、身体活动、久坐行为和复原力资源之间的动态关系。参与者完成了 6 天的 3 次爆发，每次爆发间隔 8 周。关于弹性资源的调节作用的预期没有得到支持。学术和一般压力的每日报告与久坐行为呈正相关，与轻度和中等强度的身体活动呈负相关。头发皮质醇浓度显着缓和了学业压力与久坐行为之间的关联，因此在皮质醇较低的突发事件中，压力与久坐行为之间的日常正相关关系较弱。学术和一般压力与较低水平的轻度和中等强度身体活动以及较高水平的久坐行为动态相关的发现是对先前研究的重要扩展，该研究主要依赖于横截面设计和自我报告方法。未来的研究可能会检查特定于感兴趣结果的弹性资源，而不是依赖通用资源。