Greater variability in daily physical activity is associated with poorer mental health profiles among obese adults
Greater variability in daily physical activity is associated with poorer mental health profiles among obese adults
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DOI：
10.1016/j.mhpa.2018.02.004
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发表时间：
2018-03-01
影响因子：
4.7
通讯作者：
Dunton, Genevieve F.
中科院分区：
文献类型：
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作者：
Maher, Jaclyn P.;Huh, Jimi;Dunton, Genevieve F.
关于体力活动 (PA) 是否应该每天进行，还是应该减少频率但持续较长时间才能获得心理健康益处，研究尚无定论。目前的研究调查了 PA 的日常变化与成人心理健康的相关程度，以及这种关联是否因体重指数 (BMI) 而有所不同。成年人（N = 116）完成了三波数据收集（每波持续 4 天），在此期间，参与者完成了评估心理健康（生活满意度、抑郁症状、感知压力）的调查问卷，佩戴腰部加速计，并测量了身高和体重。本研究采用了一种新颖的两阶段数据分析方法，使用独立程序 MIXWILD。第一阶段模型通过估计每日 PA 的随机位置（受试者水平平均值）和随机量表（受试者水平变异性）来划分每日 PA 的平均水平以及受试者间和受试者内方差。在第二阶段，这些每日 PA 的随机受试者效应及其与 BMI 的相互作用被用作受试者水平心理健康结果的预测因子。每日 PA 的受试者水平变异性与心理健康结果之间的关联因成人 BMI 的不同而显着不同（生活满意度：β = -0.05，p < 0.05；抑郁症状：β = 0.03，p < 0.05；感知压力：β = 0.04，p < 0.01）。与 BMI 值较低的成年人相比，BMI 值较高的成年人的 PA 每日变异性较大，与较差的心理健康状况相关。对于 BMI 值较高的人来说，不一致的活动模式可能会产生损害心理健康的后果。促进日常 PA 一致性的策略可能有助于高 BMI 个体增强心理健康。 (C) 2018 Elsevier Ltd. 保留所有权利。
Research is inconclusive about whether physical activity (PA) should be performed every day or performed less frequently but in longer bouts to obtain mental health benefits. The current study examined the extent to which day-to-day variability in PA is associated with adults' mental health, and if this association differed by Body Mass Index (BMI). Adults (N = 116) completed three waves of data collection (each lasting 4 days) during which participants completed a questionnaire assessing mental health (life satisfaction, depressive symptoms, perceived stress), wore a waist accelerometer, and had height and weight measured. This study employed a novel two-stage data analysis approach using the standalone program MIXWILD. The first-stage model partitioned mean level as well as between-subject and within subject variances in daily PA by estimating a random location (subject-level mean) and a random scale (subject-level variability) for daily PA. In the second-stage, these random subject effects for daily PA along with their interactions with BMI were used as predictors for subjectlevel mental health outcomes. Associations between subjectlevel variability in daily PA and mental health outcomes significantly differed depending on adults' BMI (life satisfaction: beta = -0.05, p < 0.05; depressive symptoms: beta = 0.03, p < 0.05; perceived stress: beta = 0.04, p < 0.01). Greater day-to-day variability in PA was associated with poorer mental health in adults with higher BMI values as compared to adults with lower BMI. For individuals with high BMI values, inconsistent activity patterns may have consequences that diminish mental health. Strategies that promote consistency in daily PA may be useful for individuals with high BMI to enhance mental health. (C) 2018 Elsevier Ltd. All rights reserved.