A Framework for Adaptive Physical Activity Stress Resilience in Youth

Thesis Abstract

This study addresses the escalating need to understand how physical activity can cultivate adaptive stress resilience among youth within school and community contexts, by developing a coherent framework that integrates physical, psychological, and social mechanisms. The aim is to construct and validate a theoretical framework—the Adaptive Physical Activity Stress Resilience (APASR) framework—that explicates how structured and unstructured physical activity, when embedded within sport, play, and daily movement, fosters resilience to stress through interconnected pathways involving physiological regulation, cognitive appraisal, emotional regulation, social support, and self-determined motivation. Specific objectives are (1) to identify the core components and processes by which adaptive physical activity influences stress responses in youth; (2) to quantify the relationships among physical activity intensity, autonomic nervous system regulation, coping strategies, and resilience outcomes; (3) to examine moderating effects of age, sex, and baseline fitness on the APASR pathways; (4) to compare framework validity across urban and rural youth populations; and (5) to develop practical guidelines for school and community programs that optimize stress resilience through tailored physical activity interventions. A mixed-methods sequential explanatory design will be employed. In the quantitative phase, a cross-sectional sample of 1,200 adolescents aged 12–18 years will be recruited from five secondary schools and three community centers. Objective physical activity will be measured with accelerometers worn for seven consecutive days, while heart rate variability (HRV) metrics (RMSSD, LF/HF ratio) will be collected during a standardized submaximal exercise protocol. Psychological outcomes will be assessed using validated scales the Connor-Davidson Resilience Scale, the Perceived Stress Scale, and the Coping Strategies Inventory. A path analysis within a structural equation modeling (SEM) framework will test the hypothesized APASR pathways, with multi-group SEM to explore invariance across urban and rural groups. The qualitative phase will involve 40 in-depth interviews and 12 focus groups with a purposive subsample of participants, coaches, PE teachers, and parents to illuminate contextual factors and mechanism plausibility. Thematic analysis will be conducted to identify recurrent patterns relating to motivation, social support, perceived competence, and environmental affordances that support resilience processes. The APASR framework posits that physically active engagement initiates autonomic regulation and endorphin hormonal responses, which enhance mood and perceived coping capacity. This physiological state interacts with cognitive appraisal processes (threat interpretation, optimistic expectancy) and emotion regulation strategies (reappraisal, distraction), moderated by self-determined motivation and social support from peers and family. These interrelated processes foster adaptive coping, leading to reduced perceived stress, improved academic and social functioning, and enhanced resilience over time. The study will test the extent to which higher habitual physical activity, greater HRV indices during effort, and stronger intrinsic motivation predict resilience outcomes, and whether these associations are stronger among older adolescents due to developmental factors. Expected findings include (a) significant positive associations between sustained physical activity, HRV stability, and resilience scores; (b) mediation effects showing coping strategies and self-determined motivation as key conduits linking activity to resilience; (c) moderation effects indicating stronger APASR effects among urban youths with higher environmental stress, and among those with supportive social ecosystems; and (d) qualitative evidence corroborating the integrated mechanism of APASR, including practitioner-relevant factors such as program structure, safety perceptions, and access to facilities. The study contributes to knowledge by offering a theoretically grounded, empirically tested framework that integrates physiological, psychological, and social dimensions of resilience in youth through physical activity, enabling scalable intervention designs for schools and communities. Practical implications include informing policy and program development for PE curricula, after-school clubs, and community-based physical activity initiatives that optimize stress resilience through modular, culturally responsive activities. Limitations acknowledged are cross-sectional design constraints for causal inference and potential self-report biases in psychosocial measures. Recommendations for future research emphasize longitudinal testing of the APASR framework, experimental trials of targeted interventions, and exploration of digital monitoring tools to personalize resilience-enhancing physical activity prescriptions.