A comparison of face-to-face or internet-delivered physical activity intervention on targeted determinants.

Steele (2009)
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This article describes the equivalency testing results of a 12-week behavior change program on targeted determinates of physical activity (PA) and self-reported health status. Participants (n = 192) were randomized to face-to-face, combined Internet and face-to-face, and Internet-only groups. Equivalency testing was used to examine differences and statistical equivalency across groups for all outcome measures (social support, self-efficacy, perceived health status, and motivational readiness for PA). Participants were assessed at baseline, postintervention, and 2 and 5 months postintervention. Motivational readiness for PA increased across all groups. The face-to-face and combined groups showed changes in social support; however, they were not statistically different and were equivalent. There were no changes in self-efficacy or physical health status. Overall face-to-face and the Internet delivery modes show similar results. If Internet-based programs can be shown to be as effective as face-to-face, they may in turn be a more efficient and cost-effective delivery method.