Adults with serious mental illness engage in limited physical activity, which contributes to significant health disparities. This study explored the use of both ecological momentary assessments (EMAs) and activity trackers in adults with serious mental illness to examine the bidirectional relationship between activity and affect with multilevel modeling. Affective states were assessed up to seven times per day using EMA across 4 days. The participants (n = 20) were equipped with a waist-worn accelerometer to measure moderate to vigorous physical activity. The participants had a mean EMA compliance rate of 88.3%, and over 90% of completed EMAs were matched with 30-min windows of accelerometer wear. The participants who reported more positive affect than others had a higher probability of engaging in moderate to vigorous physical activity. Engaging in more moderate to vigorous physical activity than one’s usual was associated with more negative affect. This study begins to address the effect of momentary mood on physical activity in a population of adults that is typically difficult to reach.

患有严重精神疾病的成年人的体力活动有限，这导致了显着的健康差异。本研究探索了在患有严重精神疾病的成年人中使用生态瞬时评估（EMA）和活动追踪器，通过多层次建模来检查活动和情感之间的双向关系。在 4 天内，每天使用 EMA 评估情感状态七次。参与者（n  = 20）配备了腰部佩戴的加速计来测量中度至剧烈的身体活动。参与者的平均 EMA 合规率为 88.3%，超过 90% 的已完成 EMA 与 30 分钟的加速度计磨损窗口相匹配。比其他人报告更积极影响的参与者更有可能进行中度至剧烈的体力活动。从事比平常更温和到剧烈的体力活动会带来更多的负面影响。这项研究开始解决通常难以接触到的成年人群体中的瞬时情绪对身体活动的影响。