The majority of Canadian youth are not obtaining the recommended 60 minutes of daily physical activity. These low activity levels may be partially explained by students’ physical self-efficacy in that cross-sectional research demonstrates a correlation between physical self-efficacy and children’s physical activity; however, school interventions focused on this relationship show limited success. Grounded in Social Cognitive Theory, the purpose of this two-phase mixed method study was to better understand the relationship between Grade 5/6 students’ physical self-efficacy and physical activity levels. In Phase 1 of the study, 243 students from a rural British Columbia school district completed a questionnaire on their physical self-efficacy and free-time physical activity. Results from this survey were analyzed using ANOVA to examine differences in free-time physical activity between groups based on physical self-efficacy, transport to school, access to facilities, and gender. Physical self-efficacy was found to be the only factor to demonstrate significant differences with high self-efficacious students generally participating in more free-time physical activity than low self-efficacious students. For Phase 2 of this study, 10 participants indicating high physical activity levels, .50 SD above the mean, half demonstrating low physical self-efficacy and half demonstrating high physical self-efficacy, were selected for individual interviews to examine rationales for being active. Analysis of these qualitative data revealed similarities and differences between the high and low physical self-efficacy groups in three motivational themes: sources of self-efficacy; sources of pleasure; and personal priorities and ideologies. These findings highlight the complexity of physical activity participation in youth and provide support for interventions that encourage physical self-efficacy enhancement and outcome-expectancy attainment. / Thesis (Master, Education) -- Queen's University, 2013-07-11 12:38:37.688

Objectives The primary objective of this study was to investigate the effect of the video-based smartphone app ‘VIDEA bewegt’ over eight programme weeks on physical activity in German adults. - Design The study used a single-arm observational design, assessing the app’s effectiveness under real-life conditions. Data were collected from July 2019 to July 2020. - Setting The app is enabling users to access video-based educational content via their smartphone. A clinical visit or in-person contact was not required. Participants All individuals registered in the freely available app were invited to take part in the study. - Interventions The app aims to increase physical activity in everyday life. It combines educative videos on lifestyle-related benefits and instructional videos of strength and endurance exercises to do at home with motivational components like goal setting, documentation of progress and personalised messages. - Primary and secondary outcome measures Primary outcomes were physical activity based one MET minutes per week (metabolic equivalent) and step numbers. Secondary outcomes included physical self-efficacy (motivational, maintenance, recovery self-efficacy), health-related quality of life: Mental Health Component Summary score and Physical Health Component Summary score. - Results Of 97 people included in the data analysis, 55 successfully completed the programme and all questionnaires. Significant increases over eight programme weeks (between T0 and T2) were observed in physical activity based on MET minutes per week, health-related quality of life, and recovery self-efficacy. Time spent sitting and body mass index significantly decreased for those completing the programme. Conclusions Although significant benefits of physical activity were observed following a complete-case analysis, results should be dealt with caution. Studies with a larger and less heterogeneous sample and robust study designs able to measure causal effects would be desirable. Trial registration number DRKS00017392.