Universidad Autónoma de Chile, Chile; Escuela de Kinesiología, Facultad de Salud y Odontología, Universidad Diego Portales, Chile.
Department of Sports Methods and Techniques, Federal University of Santa Maria, Brazil; Faculty of Health Sciences, Universidad Autónoma de Chile, Providencia, Chile.
J Sci Med Sport. 2023 Jun;26(6):309-315. doi: 10.1016/j.jsams.2023.04.007. Epub 2023 Apr 20.
To examine the theoretical substitutions of screen exposure, non-screen sitting time, moderate and vigorous physical activity with depressive and anxiety symptoms in South American adults during the COVID-19 pandemic.
A cross-sectional study during the first months of the COVID-19 pandemic with data from 1981 adults from Chile, Argentina, and Brazil.
Depressive and anxiety symptoms were assessed using the Beck Depression and Anxiety Inventories. Participants also reported physical activity, sitting time, screen exposure, sociodemographic, and tobacco use data. Isotemporal substitution models were created using multivariable linear regression methods.
Vigorous physical activity, moderate physical activity, and screen exposure were independently associated with depression and anxiety symptoms. In adjusted isotemporal substitution models, replacing 10 min/day of either screen exposure or non-screen sitting time with any intensity of physical activity was associated with lower levels of depressive symptoms. Improvements in anxiety symptoms were found when reallocating either screen exposure or non-screen sitting time to moderate physical activity. Furthermore, replacing 10 min/day of screen exposure with non-screen sitting time was beneficially associated with anxiety (B = -0.033; 95 % CI = -0.059, -0.006) and depression (B = -0.026; 95 % CI = -0.050, -0.002).
Replacement of screen exposure with any intensity of physical activity or non-screen sitting time could improve mental health symptoms. Strategies aiming to reduce depressive and anxiety symptoms highlight physical activity promotion. However, future interventions should explore specific sedentary behaviors as some will relate positively while others negatively.
在 COVID-19 大流行期间，研究南美的成年人中屏幕暴露、非屏幕坐姿时间、中高强度身体活动与抑郁和焦虑症状的理论替代关系。
这是一项在 COVID-19 大流行的最初几个月内进行的横断面研究，数据来自智利、阿根廷和巴西的 1981 名成年人。
使用贝克抑郁和焦虑量表评估抑郁和焦虑症状。参与者还报告了身体活动、坐姿时间、屏幕暴露、社会人口统计学和吸烟数据。使用多变量线性回归方法创建等时替代模型。
剧烈身体活动、中度身体活动和屏幕暴露与抑郁和焦虑症状独立相关。在调整后的等时替代模型中，将每天 10 分钟的屏幕暴露或非屏幕坐姿时间替换为任何强度的身体活动，与较低水平的抑郁症状相关。当将屏幕暴露或非屏幕坐姿时间重新分配给中度身体活动时，焦虑症状得到改善。此外，将每天 10 分钟的屏幕暴露替换为非屏幕坐姿时间与焦虑（B= -0.033；95%CI=-0.059，-0.006）和抑郁（B= -0.026；95%CI=-0.050，-0.002）呈有益相关。
用任何强度的身体活动或非屏幕坐姿时间替代屏幕暴露可以改善心理健康症状。旨在减少抑郁和焦虑症状的策略强调促进身体活动。然而，未来的干预措施应该探索特定的久坐行为，因为有些行为会产生积极影响，而有些行为则会产生消极影响。
