TY - JOUR
T1 - Self-efficacy partially mediates the effect of a school-based physical-activity intervention among adolescent girls
AU - Dishman, Rod K.
AU - Motl, Robert W.
AU - Saunders, Ruth
AU - Felton, Gwen
AU - Ward, Dianne S.
AU - Dowda, Marsha
AU - Pate, Russell R.
N1 - Funding Information:
Supported by NIH HL 57775 from the National Heart, Lung and Blood Institute.
PY - 2004/5
Y1 - 2004/5
N2 - Background. This study evaluated the effects of the Lifestyle Education for Activity Program (LEAP), a comprehensive school-based intervention emphasizing changes in instruction and school environment, on variables derived from social-cognitive theory (SCT) as mediators of change in physical activity among black and white adolescent girls. Methods. Twenty-four high schools paired on enrollment size, racial composition, urban, suburban, or rural location, and class structure were randomized into control (n = 12) or experimental (n = 12) groups. There were 1038 girls in the control group and 1049 girls in the experimental group. The multicomponent intervention emphasized the enhancement of self-efficacy and development of behavioral skills by using curricular activities within physical education classes and health education instruction. The primary outcomes were self-efficacy, outcome-expectancy value, goal setting, satisfaction, and physical activity. Results. Latent variable structural equation modeling indicated that: (1) self-efficacy and satisfaction exhibited synchronous, cross-sectional relationships with physical activity; (2) the intervention had direct effects on self-efficacy, goal setting, and physical activity; and (3) self-efficacy partially mediated the effect of intervention on physical activity. Conclusions. To our knowledge, this study provides the first evidence from a randomized controlled trial that manipulation of self-efficacy results in increased physical activity among black and white adolescent girls. The results encourage the use of self-efficacy as a targeted, mediator variable in interventions designed to increase physical activity among girls.
AB - Background. This study evaluated the effects of the Lifestyle Education for Activity Program (LEAP), a comprehensive school-based intervention emphasizing changes in instruction and school environment, on variables derived from social-cognitive theory (SCT) as mediators of change in physical activity among black and white adolescent girls. Methods. Twenty-four high schools paired on enrollment size, racial composition, urban, suburban, or rural location, and class structure were randomized into control (n = 12) or experimental (n = 12) groups. There were 1038 girls in the control group and 1049 girls in the experimental group. The multicomponent intervention emphasized the enhancement of self-efficacy and development of behavioral skills by using curricular activities within physical education classes and health education instruction. The primary outcomes were self-efficacy, outcome-expectancy value, goal setting, satisfaction, and physical activity. Results. Latent variable structural equation modeling indicated that: (1) self-efficacy and satisfaction exhibited synchronous, cross-sectional relationships with physical activity; (2) the intervention had direct effects on self-efficacy, goal setting, and physical activity; and (3) self-efficacy partially mediated the effect of intervention on physical activity. Conclusions. To our knowledge, this study provides the first evidence from a randomized controlled trial that manipulation of self-efficacy results in increased physical activity among black and white adolescent girls. The results encourage the use of self-efficacy as a targeted, mediator variable in interventions designed to increase physical activity among girls.
KW - African American
KW - Behavior modification
KW - Exercise
KW - Latent variable structural equation modeling
KW - Randomized controlled trial
KW - Social cognitive theory
UR - http://www.scopus.com/inward/record.url?scp=1842580426&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1842580426&partnerID=8YFLogxK
U2 - 10.1016/j.ypmed.2003.12.007
DO - 10.1016/j.ypmed.2003.12.007
M3 - Article
C2 - 15066366
AN - SCOPUS:1842580426
SN - 0091-7435
VL - 38
SP - 628
EP - 636
JO - Preventive Medicine
JF - Preventive Medicine
IS - 5
ER -