School of Health Sciences, Institute of Mental Health Sciences, Ulster University, Newtownabbey, UK.
School of Health Sciences, Ulster University, Newtownabbey, UK.
Scand J Med Sci Sports. 2020 Oct;30(10):1957-1965. doi: 10.1111/sms.13762. Epub 2020 Jul 28.
Regular moderate-to-vigorous physical activity (MVPA) is associated with improved mental health, but the evidence for the effect of reducing sedentary behavior (SB) or increasing light PA (LPA) in older adults is lacking. Using isotemporal substitution (IS) models, the aim of this paper was to investigate the effect of substituting SB with LPA or MVPA on associations with mental health in older adults.
Data from 1360 older adults (mean age 75.18 years) in four countries were utilized. PA and SB was measured using ActiGraph wGT3X-BT + accelerometers worn for 7 days. Self-rated mental health was measured using the Hospital and Anxiety Depression Scale (HADS). IS models estimated cross-sectional associations when 30 minutes of one behavior was substituted with another. Models were adjusted for age, sex, marital status, and educational attainment.
Substituting 30 minutes of SB with LPA (β -.37; 95% CI -0.42, -0.32) or MVPA (β -.14; 95% CI -0.21, -0.07) and substituting LPA with MVPA (β -.11; 95% CI -0.18, -0.04) were associated with improvements in anxiety. However, substituting 30 minutes of SB with LPA (β .55; 95% CI 0.49, 0.62) was associated with increased depression.
Replacing 30 minutes of SB with LPA or MVPA was associated with improved anxiety symptoms in older adults. Greater benefits were observed when shifting SB and LPA to MVPA.
有规律的中等到剧烈的身体活动（MVPA）与改善心理健康有关，但减少久坐行为（SB）或增加低强度PA（LPA）对老年人的影响证据不足。本文使用等时替代（IS）模型，旨在研究用 LPA 或 MVPA 替代 SB 对老年人心理健康的关联的影响。
利用来自四个国家的 1360 名老年人（平均年龄 75.18 岁）的数据。使用 ActiGraph wGT3X-BT + 加速度计测量 PA 和 SB，佩戴 7 天。使用医院焦虑和抑郁量表（HADS）测量自我评估的心理健康状况。IS 模型估计了一种行为替代另一种行为时的横断面关联。模型调整了年龄、性别、婚姻状况和教育程度。
用 30 分钟的 SB 替代 LPA（β=-.37；95%CI：-0.42，-0.32）或 MVPA（β=-.14；95%CI：-0.21，-0.07），用 LPA 替代 MVPA（β=-.11；95%CI：-0.18，-0.04）与焦虑的改善相关。然而，用 30 分钟的 SB 替代 LPA（β=0.55；95%CI：0.49，0.62）与抑郁的增加有关。
用 LPA 或 MVPA 替代 30 分钟的 SB 与老年人焦虑症状的改善有关。从 SB 和 LPA 转移到 MVPA 时，观察到更大的益处。
