Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Hwy, Burwood, VIC, 3125, Australia.
Int J Behav Nutr Phys Act. 2008 May 6;5:27. doi: 10.1186/1479-5868-5-27.
The high prevalence of depression in women is an increasing public health concern. Although studies have found associations between physical activity (PA) and depression, little is known about the optimal domain, dose and social context of PA for reducing the risk of depression. This study aimed to investigate associations between specific components of PA (domain, dose and social context) and odds of depressive symptoms in women.
The sample included 1,501 women, aged 18-65. Analyses were performed using cross-sectional data collected from a mail-out survey in 2004. The survey included self-report measures of PA behaviours and depressive symptoms. Crude and adjusted (age, marital status and physical health) odds ratios (OR) and 95% confidence intervals (CI) were calculated for each component of PA and odds of depressive symptoms using logistic regression analyses.
Those who reported more than 3.5 hours leisure-time PA per week had lower odds of depressive symptoms when compared to those who undertook less than this. No other domains of PA (eg. work-related, transport-related or domestic activity) were associated with odds of depressive symptoms. Odds of depressive symptoms were lower among women who reported more than 1.5 hours of moderate-intensity (OR = 0.67, CI = 0.45-0.98) or more than 1.75 hours vigorous-intensity (OR = 0.60, CI = 0.42-0.84) leisure-time PA per week. Being discouraged to be active by others was associated with higher odds of depressive symptoms (OR = 2.28, CI = 1.00-5.16), whilst being active with a family member was associated with lower odds of depressive symptoms (OR = 0.61, CI = 0.43-0.87).
Acknowledging the cross-sectional design, these findings suggest that the domain and social context of PA may be more important for mental health among women than simply the total dose of PA.
女性中抑郁的高患病率是一个日益严重的公共卫生问题。虽然研究发现体力活动（PA）与抑郁之间存在关联，但对于降低抑郁风险的 PA 的最佳领域、剂量和社会环境知之甚少。本研究旨在调查 PA 的特定组成部分（领域、剂量和社会环境）与女性抑郁症状之间的关联。
该样本包括 1501 名年龄在 18-65 岁之间的女性。分析使用 2004 年邮寄调查的横断面数据进行。该调查包括 PA 行为和抑郁症状的自我报告措施。使用逻辑回归分析计算 PA 各组成部分与抑郁症状发生几率的比值比（OR）和 95%置信区间（CI）。
与每周进行少于此时间的人相比，每周报告超过 3.5 小时休闲时间 PA 的人抑郁症状发生几率较低。其他 PA 领域（例如工作相关、交通相关或家务活动）与抑郁症状的发生几率无关。报告每周进行超过 1.5 小时中等强度（OR=0.67，CI=0.45-0.98）或超过 1.75 小时剧烈强度（OR=0.60，CI=0.42-0.84）休闲时间 PA 的女性，其抑郁症状发生几率较低。被他人劝阻活动与较高的抑郁症状发生几率相关（OR=2.28，CI=1.00-5.16），而与家庭成员一起活动则与较低的抑郁症状发生几率相关（OR=0.61，CI=0.43-0.87）。
考虑到横断面设计，这些发现表明，PA 的领域和社会环境对于女性的心理健康可能比 PA 的总剂量更为重要。
