Correlates of objectively measured physical activity in preadolescent youth

Trost, S.G., Pate, R.R., Ward, D.S., Saunders, R., & Riner, W. (1999) Correlates of objectively measured physical activity in preadolescent youth. American Journal of Preventive Medicine, 17(2), pp. 120-126.

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The purpose of this study was to identify the psychosocial and environmental correlates of objectively measured physical activity behavior in a diverse sample of sixth-grade students.



Participants and Setting

One hundred ninety-eight sixth-grade students from 4 public middle schools in Columbia, South Carolina. The study group was 52.0% female, 55.1% African-American, with a mean age of 11.4 +/- 0.6 years.

Main Outcome Measures

Time spent in moderate physical activity (MPA) and vigorous physical activity (VPA) was assessed using a uniaxial accelerometer (CSA WAM 7164) (Computer Science and Applications Inc., Shalimar, FL). Determinant variables included: age, gender, race/ethnicity (demographic); physical activity self-efficacy, social norms related to physical activity, and beliefs regarding physical activity outcomes (psychosocial); and perceived physical activity habits of parents and peers, involvement in community physical activity organizations, involvement in community-based sports programs, access to fitness/sporting equipment at home, and self-reported hours spent watching television or playing video games (environmental).


For boys, physical activity self-efficacy, social norms related to physical activity, and involvement in community physical activity organizations were salient predictors of MPA and VPA. Among girls, only physical activity self-efficacy emerged as a clear predictor of objectively measured physical activity.


These findings are consistent with previous studies using self-reported physical activity and suggest that interventions to increase physical. activity in preadolescent youth should endeavor to boost physical activity self-efficacy by offering a wide selection of enjoyable, developmentally-appropriate physical activity options.

Impact and interest:

115 citations in Scopus
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107 citations in Web of Science®

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ID Code: 71799
Item Type: Journal Article
Refereed: Yes
Additional Information: ISI Document Delivery No.: 224NC Times Cited: 99 Cited Reference Count: 41 Trost, SG Pate, RR Ward, DS Saunders, R Riner, W Elsevier science inc New york
Keywords: exercise, sports, health promotion, physical fitness, behavioral, medicine, child, risk behavior survey, heart-rate, activity patterns, young-children, adolescents, determinants, exercise, american, students, fitness
DOI: 10.1016/s0749-3797(99)00056-2
ISSN: 0749-3797
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Deposited On: 20 May 2014 00:56
Last Modified: 20 May 2014 00:56

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