A Parental Support Intervention for Children's Nature-Based Physical Activity: A Randomized Controlled Trial

Condition(s) studied

Investigational drug(s) / intervention(s)

Self-Determination Theory plus identity intervention group: Participants in this group received an 8-week WeChat-based parental support intervention designed to increase parents' support for children's physical activity in outdoor natural spaces. The intervention content was grounded in Self-Determination Theory and focused on enhancing parents' autonomy, competence, and relatedness in supporting their children's outdoor nature-based physical activity. In addition, this arm included identity-focused content designed to strengthen parents' support identity, helping parents view the provision of support for children's physical activity in outdoor natural spaces as consistent with their role as supportive parents. Two articles were delivered each week via a WeChat Official Account and disseminated through the condition-specific WeChat group, resulting in 16 articles in total.

Self-Determination Theory intervention group: Participants in this group received an 8-week WeChat-based parental support intervention grounded in Self-Determination Theory. The intervention focused on enhancing parents' autonomy, competence, and relatedness in supporting their children's physical activity in outdoor natural spaces. The content was designed to help parents recognise the value of supporting children's outdoor nature-based physical activity, increase their confidence in providing practical support, and foster supportive parent-child interactions around outdoor activity participation. Two articles were delivered each week via a WeChat Official Account and disseminated through the condition-specific WeChat group, resulting in 16 articles in total. This group served as a theory-based comparator intervention to examine the additional contribution of the identity-focused component.

Study summary

This three-arm randomized controlled trial evaluated the effectiveness of an 8-week, WeChat-based parental support intervention designed to increase parents' support for children's physical activity in outdoor natural spaces. Participants were randomly assigned to a Self-Determination Theory plus identity intervention group, a Self-Determination Theory intervention group, or an education control group. Across the intervention period, each group received two articles per week via a WeChat Official Account, which were disseminated through condition-specific WeChat groups.

The primary outcome was parental support for children's physical activity in outdoor natural spaces. Secondary outcomes included children's physical activity in outdoor natural spaces and theory-based psychological variables related to parental support. Assessments were conducted at baseline, immediately post-intervention, and 8 weeks after the intervention had ended. Findings are intended to inform the development of feasible, theory-informed digital interventions to enhance parental support for children's nature-based physical activity.

Eligibility

Primary outcome measure(s)

• Parental support for children's nature-based physical activity — Baseline, Week 8 (Post-intervention), and Week 16 (Follow-up, 8 weeks post-intervention).
  Parental support for children's nature-based physical activity will be assessed using an adapted 5-item parental support questionnaire. The items were adapted from previous measures of parental support for children's physical activity and parent-child co-participation in physical activity-related behaviours, with wording modified to focus on children's physical activity or sport participation in outdoor natural environments. The questionnaire assesses parental encouragement, co-participation, transportation/logistical support, parental role modelling, and organisation of family outdoor activities. Items are rated on a 5-point frequency scale from 1 = never to 5 = every day. A mean score will be calculated, with higher scores indicating greater support for children's nature-based physical activity.

Trial sites (1)

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