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Research sought to identify combinations of risk and protective factors predicting change in physical activity (PA) over one year in high school students. Adolescents (N = 344; M = 15.7 years) participated in a longitudinal study with assessment of demographics, substance use/smoking exposure, height and weight, psychological factors, and PA in 10th and 11th grade. PA participation in 11th grade was greatest for adolescents who engaged in PA and had high sports competence (78%), and least for adolescents who did not engage in or enjoy PA (13%) in 10th grade. Identifying adolescent subgroups at risk for decreasing PA can inform the development of tailored interventions.
Dunton is with the Dept. of Preventive Medicine, University of Southern California, Alhambra, CA. Atienza is with the Health Promotion Research Branch, National Cancer Institute, Rockville, MD. Tscherne and Rodriguez are with the Dept. of Psychiatry, University of Pennsylvania, Philadelphia, PA.