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Journal of Health Psychology, Vol. 13, No. 1, 121-130 (2008)
DOI: 10.1177/1359105307084317

Youth and Adolescent Physical Activity Lapsers

Examining Self-efficacy as a Mediator of the Relationship between Family Social Influence and Physical Activity

Christopher A. Shields

Acadia University, Canada, chris.shields{at}acadiau.ca

Kevin S. Spink

University of Saskatchewan, Canada

Karen Chad

University of Saskatchewan, Canada

Nazeem Muhajarine

University of Saskatchewan, Canada

Louise Humbert

University of Saskatchewan, Canada

Pat Odnokon

University of Saskatchewan, Canada

The present study examined whether self-efficacy mediates the relationship between family social influence and physical activity among youth who have experienced a recent lapse in their physical activity participation. Using a prospective, longitudinal design, participants completed measures of social influence, self-regulatory efficacy and physical activity. Only those participants whose physical activity declined were retained for further analysis. Self-regulatory efficacy partially mediated the relationship between family social influence and physical activity, with self-efficacy mediating 36 percent of the total effect. The results provide support for self-regulatory efficacy as a mediator and provide preliminary insight into the potential mechanisms for preventing lapses in activity from developing into prolonged periods of inactivity within this population.

Key Words: efficacy • exercise • mediation • social support • youth


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