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Effect on physical activity of a randomized afterschool intervention for inner city children in 3rd to 5th grade |
Crouter SE, de Ferranti SD, Whiteley J, Steltz SK, Osganian SK, Feldman HA, Hayman LL |
PLoS ONE 2015 Oct;10(10):e0141584 |
clinical trial |
4/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed* |
BACKGROUND: Less than 45% of US children meet the 60 min/d physical activity (PA) guideline. Structured after-school PA programing is one approach to help increase activity levels. This study aimed to evaluate the feasibility and short-term impact of a supervised after-school PA and nutrition education program on activity levels. METHODS: Forty-two 3rd to 5th graders from an inner-city school in Boston, MA were randomly assigned to a 10-wk after-school program of either: (1) weekly nutrition education, or (2) weekly nutrition education plus supervised PA 3 d/wk at a community-based center. At baseline and follow-up, PA was measured using accelerometry and fitness (VO2max) was estimated using the PACER 15-m shuttle run. Additional measures obtained were non-fasting finger stick total cholesterol (TC) and glucose levels, waist circumference (WC), body mass index (BMI), percent body fat (%BF), and blood pressure (BP). Values are presented as mean +/- SE, unless noted otherwise. RESULTS: Thirty-six participants completed the study (mean +/- SD age 9.7 +/- 0.9 years). Participants attended > 80% of the sessions. After adjusting for accelerometer wear time and other design factors, light and moderate-to-vigorous PA (MVPA) increased in the nutrition+PA group (+21.5 +/- 14.5 and +8.6 +/- 8.0 min/d, respectively) and decreased in the nutrition only group (-35.2 +/- 16.3 and -16.0 +/- 9.0 min/d, respectively); mean difference between groups of 56.8 +/- 21.7 min/d (light PA, p = 0.01) and 24.5 +/- 12.0 min/d (MVPA, p = 0.04). Time spent in sedentary behaviors declined in the nutrition+PA group (-14.8 +/- 20.7 min d-1) and increased in the nutrition only group (+55.4 +/- 23.2 min/d); mean difference between groups of -70.2 +/- 30.9 min/d (p = 0.02). Neither group showed changes in TC, BP, WC, %BF, BMI percentile, or fitness (p > 0.05). CONCLUSIONS: The supervised afterschool community-based nutrition and PA program was well accepted and had high attendance. The changes in light PA and MVPA has potential to promote weight maintenance in inner-city elementary school children, however longer term studies with larger samples are needed. TRIAL REGISTRATION: ClinicalTrials.gov NCT01104038.
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