青少年 7 至 8 年级时，习惯性久坐时间与执行功能和短期记忆的关联。
Associations of habitual sedentary time with executive functioning and short-term memory in 7th and 8th grade adolescents.
机构信息
Department of Public Health and Primary Care, Ghent University, Corneel Heymanslaan 10, 9000, Ghent, Belgium.
Department of Movement and Sport Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.
出版信息
BMC Public Health. 2024 Feb 16;24(1):495. doi: 10.1186/s12889-024-18014-x.
BACKGROUND
While there is increasing evidence for negative physical health consequences of high volumes of sedentary time and prolonged sedentary time in adolescents, the association with cognition is less clear. This study investigated the association of volumes of habitual sedentary time and prolonged sedentary time with executive functions and short-term memory in adolescents.
METHODS
This study has a cross-sectional observational study design. Volumes of sedentary time and prolonged sedentary time (accumulated sedentary time spent in bouts of ≥ 30 min) were measured using the Axivity AX3 accelerometer. Six cognitive functions (spatial and verbal short-term memory; and working memory, visuospatial working memory, response inhibition and planning as executive functions) were measured using six validated cognitive assessments. Data were analysed using generalised linear models.
RESULTS
Data of 119 adolescents were analysed (49% boys, 13.4 ± 0.6 year). No evidence for an association of volumes of sedentary time and prolonged sedentary time with spatial and verbal short-term memory, working memory, and visuospatial working memory was found. Volumes of sedentary time and prolonged sedentary time were significantly related to planning. One hour more sedentary time or prolonged sedentary time per day was associated with respectively on average 17.7% (95% C.I.: 3.5-29.7%) and 12.1% (95% C.I.: 3.9-19.6%) lower scores on the planning task.
CONCLUSIONS
No evidence was found for an association of volumes of habitual sedentary time and prolonged sedentary time with short-term memory and executive functions, except for planning. Furthermore, the context of sedentary activities could be an important confounder in the association of sedentary time and prolonged sedentary time with cognition among adolescents. Future research should therefore collect data on the context of sedentary activities.
TRIAL REGISTRATION
This study was registered at ClinicalTrials.gov in January 2020 (NCT04327414; released on March 11, 2020).
背景
虽然有越来越多的证据表明青少年久坐时间过长和长时间久坐会对身体健康产生负面影响，但与认知的关系尚不清楚。本研究调查了青少年习惯性久坐时间和长时间久坐时间与执行功能和短期记忆的关系。
方法
本研究采用横断面观察性研究设计。使用 Axivity AX3 加速度计测量久坐时间和长时间久坐时间（累计久坐时间超过 30 分钟的时间）。使用六项经过验证的认知评估测试来测量六种认知功能（空间和语言短期记忆；工作记忆、视觉空间工作记忆、反应抑制和计划作为执行功能）。使用广义线性模型进行数据分析。
结果
分析了 119 名青少年的数据（49%为男性，年龄 13.4±0.6 岁）。没有证据表明久坐时间和长时间久坐时间与空间和语言短期记忆、工作记忆和视觉空间工作记忆之间存在关联。久坐时间和长时间久坐时间与计划显著相关。每天多坐 1 小时或长时间久坐，与计划任务的得分平均分别降低 17.7%（95%置信区间：3.5-29.7%）和 12.1%（95%置信区间：3.9-19.6%）相关。
结论
除了计划之外，没有证据表明习惯性久坐时间和长时间久坐时间与短期记忆和执行功能有关。此外，久坐活动的环境可能是久坐时间和长时间久坐时间与青少年认知之间关联的一个重要混杂因素。因此，未来的研究应该收集关于久坐活动环境的数据。
试验注册
本研究于 2020 年 1 月在 ClinicalTrials.gov 注册（NCT04327414；于 2020 年 3 月 11 日发布）。
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