Television Viewing: Moderator or Mediator of an Adolescent Physical Activity Intervention?-Reference-Cited by-同舟云学术

Television Viewing: Moderator or Mediator of an Adolescent Physical Activity Intervention?

Published:2008-11 Issue:2 Volume:23 Page:88-91
ISSN:0890-1171
Container-title:American Journal of Health Promotion
language:en
Short-container-title:Am J Health Promot

Author:

Graham Dan J.¹,Schneider Margaret¹,Cooper Dan M.¹

Affiliation:

1. Dan J. Graham, MA, is with the Department of Psychology and Social Behavior, University of California-Irvine, Irvine, California. Margaret Schneider, PhD, is with the Department of Planning Policy, and Design, University of California-Irvine, Irvine, California. Dan M. Cooper, MD, is with the Department of Pediatrics, University of California-Irvine, Irvine, California

Abstract

Purpose. To determine whether the amount of television (TV) watched by participants enrolled in a physical activity intervention mediates or moderates program effectiveness. Design. Nine-month, controlled, school-based physical activity intervention. Setting. Public high school. Participants. One hundred twenty-two sedentary adolescent females (mean + standard deviation age = 15.04 + 0.79 years). Intervention. Supervised in-class exercise, health education, and internet-based self-monitoring. Measures. Physical activity by 3-day physical activity recall; TV viewing by self-reports; cardiovascular fitness by cycle ergometer. Analysis. T-tests were conducted to examine between-group differences. Linear regression equations tested the mediating or moderating role of TV watching relative to the intervention. Results. TV viewing moderated the intervention's effect on vigorous activity; the intervention significantly predicted change in physical activity among high (β = −.45; p < .001), but not among low (p > .05), TV watchers. TV viewing did not mediate the intervention effect. Conclusions. Consistent with displacement theory, adolescents who watched more TV prior to the intervention showed postintervention increases in vigorous physical activity and concomitant decreases in TV viewing, whereas those who watched less TV showed no change in physical activity or TV viewing.

Publisher

SAGE Publications

Subject

Public Health, Environmental and Occupational Health,Health (social science)

Link

http://journals.sagepub.com/doi/pdf/10.4278/ajhp.07053050

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