title: Relations of physical self-concept and self-efficacy with frequency of voluntary physical activity in preadolescents: implications for after-school care programming.
abstract: OBJECTIVE
  This study aimed to test relations of physical self-concept and self-efficacy with voluntary physical activity in preadolescents enrolled in an after-school physical activity program.
  
  
  METHODS
  Participants in the 2003 (n=41) and 2005 (n=84) versions of the Youth Fit For Life protocol and the control group (n=40) completed the Physical Self-Concept scale, the Exercise Barriers Self-Efficacy Scale for Children, and a recall of physical activity frequency at Weeks 1 and 12.
  
  
  RESULTS
  Both treatment groups demonstrated significantly increased frequency of voluntary physical activity over 12 weeks. The 2005 version additionally demonstrated significant improvements in both physical self-concept and exercise barriers self-efficacy. Within the treatment groups, significant correlations between changes in physical self-concept and self-efficacy and physical activity sessions completed were found. Multiple regression indicated that 7% to 28% of the variance in voluntary physical activity was explained by the simultaneous entry of changes in physical self-concept and self-efficacy.
  
  
  CONCLUSIONS
  Tenets of social cognitive and self-efficacy theory were supported and suggested that curricular elements of after-school care programming may increase overall outputs of moderate-to-vigorous physical activity in preadolescents.
authors.affiliation: YMCA of Metropolitan Atlanta, 100 Edgewood Avenue, N.E., Suite 1100, Atlanta, GA 30303, USA. jamesa@ymcaatlanta.org
authors.forename: James J
authors.initials: JJ
authors.lastname: Annesi
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009043:Motor Activity; D012572:School Health Services / Q000458:organization & administration*; D012649:Self Concept; D020377:Self Efficacy; D011795:Surveys and Questionnaires; D013997:Time Factors; D014836:Volition