Marianne Clark

Learn More
BACKGROUND The purposes of this study were to determine if a) gender moderated the relationship between self-efficacy and physical activity (PA) among youth in Alberta, Canada, and, alternatively b) if self-efficacy mediated the relationship between gender and PA. METHODS A novel web-based tool was used to survey a regionally diverse sample of 4779(More)
The purpose of this research was to evaluate television advertisements targeted at 55-70-year olds that promoted physical activity and fruit and vegetable consumption. Awareness of the campaign, perceived credibility of the source, intentions to visit a promoted website, and intentions to perform the healthy behaviors were evaluated using mixed methods(More)
Evidence supports the link between the built environment and physical activity. This study investigated factors that influence the decisions made by key stakeholders as they relate to neighbourhood development. Seventeen stakeholders including public health and municipal employees (n=9), city councillors (n=3), and the private sector (e.g., land developers,(More)
BACKGROUND The pursuit of unproven stem cell-based interventions ("stem cell tourism") is an emerging issue that raises various concerns. Physicians play different roles in this market, many of which engage their legal, ethical and professional obligations. In Canada, physicians are members of a self-regulated profession and their professional regulatory(More)
BACKGROUND ParticipACTION was a pervasive communication campaign that promoted physical activity in the Canadian population for three decades. According to McGuire's hierarchy-of-effects model (HOEM), this campaign should influence physical activity through intermediate mediators such as beliefs and intention. Also, when such media campaigns occur,(More)
BACKGROUND Minimizing sedentary behavior, in particular screen-based sedentary behavior, during the early years is important for healthy growth and development. Consequently, new Canadian Sedentary Behaviour Guidelines for the Early Years (aged 0-4 years) were recently released. Researchers are unclear what messages should supplement the guidelines when(More)
OBJECTIVE To examine the nature of media coverage of vitamin D in relation to its role in health and the need for supplements. DESIGN Media content analysis. SETTING Print articles from elite newspapers in the UK, the USA and Canada. PARTICIPANTS 294 print newspaper articles appearing over 5 years (2009-2014). RESULTS Newspaper coverage of vitamin D(More)