Impact of family YMCA membership on childhood obesity: a randomized controlled effectiveness trial.

BACKGROUND Treatment studies about childhood obesity in primary care are lacking. We hypothesized that providing a paid family membership to the YMCA would be effective in reducing weight. METHODS Patients 5 to17 years old in at least the 85th body mass index (BMI) percentile were eligible. All participants were scheduled to attend 4 nutrition classes and to return for evaluation at 2, 4, 6, 9, and 12 months. Participants were randomized to nutrition classes only (n = 39) or nutrition classes and family YMCA membership (n = 44). The primary outcome measure was year change in BMI-for-age percentile. RESULTS Median BMI percentile at baseline was 99. Only 27 of 36 evaluable participants in the treatment group visited the YMCA. Four participants in the control group and one in the treatment group achieved the target reduction of 2 BMI percentile points (Fisher's exact, P = .17). Within the treatment group, YMCA attendees had a mean increase of 0.30 BMI points compared with an increase of 0.60 BMI points in nonattendees (P = .28). CONCLUSION In very obese children, eliminating financial barriers to YMCA membership is insufficient to induce more weight loss during 1 year compared with nutrition classes alone. Improvements in nutrition intake were reported by both groups.