BACKGROUND Nurses' suboptimal physical activity (PA) levels place them at high risk for cardiovascular diseases. Little is known about the motivational factors that influence their PA behavior. PURPOSE This study drew on the Self-Determination Theory (SDT) to investigate whether associations between nurses' levels of mood disturbance, psychological need satisfaction (competence, autonomy, and relatedness), and self-determined motivation predict levels of objectively assessed PA. METHODS A total of 363 nurses recruited from 14 hospitals in the Champlain region of Ontario, Canada, wore ActiGraph GT3X accelerometers and completed standardized questionnaires assessing sociodemographic and work characteristics, mood disturbance, and SDT variables. Levels of moderate-to-vigorous intensity PA (MVPA) were measured in minutes/week in bouts ≥10 min. Data were analyzed using path analysis and multiple mediational model. RESULTS The model predicting MVPA showed good fit to the data, χ 2 (4, n = 363) = 7.82, p = .10; comparative fit index = .991; Tucker-Lewis Index = .967; root mean square error of approximation = .051. Higher mood disturbance was associated with lower perceived competence (β = -.29, p = .002), autonomy (β = -.29, p = .002), and relatedness (β = -.19, p = .002). Lower perceived competence (β = .46, p = .003) and autonomy (β = .14, p = .011), as well as higher mood disturbance (β = -.16, p = .016), were associated with less self-determined motivation for PA. Lower self-determined motivation was associated with lower levels of MVPA among nurses. CONCLUSIONS Interventions targeting low mood, as well as perceived competence and autonomy in exercise, may promote MVPA among nurses and reduce cardiac risk.

中文翻译：

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是什么促使护士运动？使用自决理论在加拿大护士中进行体育锻炼的决定因素。

背景技术护士的最佳身体活动（PA）水平使他们极易患心血管疾病。关于影响其PA行为的动机因素知之甚少。目的这项研究利用自我决定理论（SDT）来调查护士的情绪障碍水平，心理需要满意度（能力，自主性和相关性）与自我决定的动机之间的关联是否可以预测客观评估的PA水平。方法从加拿大安大略省尚普兰地区的14家医院招募的363名护士穿着ActiGraph GT3X加速度计并完成了标准化问卷，以评估社会人口统计学和工作特征，情绪障碍和SDT变量。在≥10分钟的发作中，以分钟/周为单位测量中度至剧烈强度PA（MVPA）。使用路径分析和多元中介模型分析数据。结果预测MVPA的模型与数据拟合良好，χ2（4，n = 363）= 7.82，p = .10；比较拟合指数= 0.991；塔克-刘易斯指数= .967; 近似均方根误差= .051。较高的情绪障碍与较低的感知能力（β= -.29，p = .002），自主性（β= -.29，p = .002）和相关性（β= -.19，p = .002）相关。较低的感知能力（β= .46，p = .003）和自主性（β= .14，p = .011），以及较高的情绪障碍（β= -.16，p = .016）与PA的自我决定动机更少。护士的自我决定动机降低与MVPA水平降低有关。