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Purpose:  The aim of this study was to compare adherence and dropout rates in adolescents with obesity participating in a behavioral-counseling intervention with or without recreational physical activity (PA).  Material and methods:  Seventy-four adolescents (13 to 18y, 40 girls and 34 boys) with obesity (body mass index [BMI] z-score ≥ 2.0) were randomized into a counseling group (CG; n = 37) and a counseling + recreational physical activity group (CPAG; n = 37). Adolescents from both groups received behavioral counseling once a week for 12 weeks and monthly for an additional 12 weeks. CPAG adolescents participated in supervised recreational physical activity sessions twice a week for 12 weeks. Body composition, body image dissatisfaction, symptoms of depression, binge eating, bulimia, anorexia and quality of life were assessed at baseline and after 24-weeks.  Result:  The dropout rate was 2.73 times higher in adolescents from CG compared to CPAG (χ 2  = 4.48;  p  = .034; R 2McF  = 0.044). Girls were 2.56 times more likely to withdraw when compared to boys (χ 2  = 3.86;  p  = .049; R 2McF  = 0.038). Binomial logistic regression which incorporated sex, intervention group, BMI z-score and BSQ score at baseline (R 2McF  = 0.177) explained 75% of the dropout rate. Both interventions were effective in reducing waist circumference ( p  &lt; .01) and improving quality of life, symptoms of depression, bulimia and binge eating ( p  &lt; .01).  Conclusion:  Incorporating a recreational physical activity component to a non-intensive behavioral intervention may be a feasible strategy to reduce dropout rates in adolescents with obesity seeking treatment.

Recreational Physical Activity Improves Adherence and Dropout in a Non-Intensive Behavioral Intervention for Adolescents With Obesity