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Protection Motivation Theory and Physical Activity

A Longitudinal Test among a Representative Population Sample of Canadian Adults

University of Newcastle, Australia, ron.plotnikoff{at}newcastle.edu.au, University of Alberta, Canada

Ryan E. Rhodes

University of Victoria, Canada

Linda Trinh

University of Alberta, Canada

The purpose of this study was to examine the Protection Motivation Theory (PMT) to predict physical activity (PA) behaviour in a large, population-based sample of adults. One thousand six hundred and two randomly selected individuals completed two telephone interviews over two consecutive six-month periods assessing PMT constructs. PMT explained 35 per cent and 20 per cent of the variance in intention and behaviour respectively. Coping cognitions as moderators of threat explained 1 per cent of the variance in intention and behaviour. Age and gender as moderators of threat did not provide additional variance in the models. We conclude that salient PMT predictors (e.g. self-efficacy) may guide the development of effective PA interventions in the general population.

Key Words: adults • physical activity • Protection Motivation Theory

Journal of Health Psychology, Vol. 14, No. 8, 1119-1134 (2009)
DOI: 10.1177/1359105309342301


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