Abstract
BACKGROUND: Few children meet physical activity and screen-time guidelines. Parents play a key role in supporting children's physical activity and limiting child screen-time, but their own stress, management of stress (i.e., coping), and mood may impact their ability to do so. Ecological momentary assessment (EMA) is a methodology that can be used to assess the temporality of parental state (i.e., stress, mood) and subsequent child behavior. This study aimed to examine the relationship between parental stress, coping, and mood with child physical activity and screen-time, and whether there were differences by child sex. METHODS: Parents and their children (n = 436, 5-9 y) participated in an EMA study that used signal-contingent and end-of-day surveys. Parents received three signal-contingent surveys during fixed 3-hour windows and one end-of-day survey over 7-days via smartphone notifications. Parents reported their current stress, ability to manage stress, and depressive mood at the first signal-contingent survey. Parents also reported the frequency of their child's physical activity and screen-time across the day during the end-of-day survey. Conditional fixed effects regression was fitted to examine current and lagged day stress, coping, and mood relationships on change in child physical activity and screen-time. RESULTS: Children were girls (53.7%), mainly non-white (64.3%), and with a household income of less than $50,000 USD (54.1%). Overall, parent's current day stress was negatively related to the frequency of child physical activity (p = 0.001), but not screen-time. Among girls, higher parent current-day stress and lower coping were related to less frequent girl's physical activity (ps < 0.05). Parent's lagged day stress was then associated with more frequent girl physical activity the next day (p = 0.018). There were no associations among parent mood or in models with only boys. CONCLUSIONS: This study found parent's stress may negatively impact child's physical activity that day, but may positively impact physical activity the next day, namely girls. Findings suggest that reducing parental stress and improving coping abilities may improve girl's physical activity, but other approaches are needed to reduce child screen-time at this age.