Abstract 20210: Impact of Additional School Sports on Cardiovascular Risk Factors and Cardiopulmonary Fitness in School Children With Different Socio-Educational Status
Background: Cardiovascular risk factors such as obesity, physical inactivity and high blood pressure positively correlate with early atherosclerosis already in adolescents. Furthermore, socio-educational status has a significant impact on cardiovascular risk factors and development of cardiovascular diseases. The aim of this prospective, randomized study was to improve physical fitness by means of additional school exercise lessons at two schools with different socio-educational status (SES) and to examine its impact on cardiovascular risk factors.
Methods and Results: 134 students from one school with high SES (HSES) (age: 11.28± 0.5 years) and 61 students from one school with low SES (LSES) (age: 11.63 ± 0.6 years) were randomized into an intervention group (IG) with daily school sports and a control group (CG) with regular school sports twice a week. At baseline students with LSES have a significant higher absolute BMI-Percentile (BMI-P) (61.21±12.8 vs 45.2±11.1%; p=0.002) and a lower fat free mass (FFM in %) (75.48±8.9 vs 78.6±10.1%, p= 0.04) than students with HSES. Motor skills are higher in children with HSES (107.8±91.1 vs 100.0±16.5; p<0.005). In contrast, maximal oxygen uptake (VO2max) at baseline is higher in LSES (38.87±6.8 vs 44.70±7.29 ml/min/kg; p<0.005). After two years of intervention, students with HSES improve their cardio-pulmonary fitness significantly compared to CG (46.47±8.0 vs 49.89±7.8; p=0.02), whereas in LSES there is no improvement in both groups (CG 40.38±9.0 vs 42.12±5.2, p=0.43; p<0.05 vs HSES). But daily physical activity seems to have a positive impact on body composition in LSES students (Table 1).
Conclusion: Additional exercise at school has a significant positive effect on body composition and exercise capacity. The benefit in children with lower socio-educational though seems to be smaller than with higher socio-educational status.
- © 2010 by American Heart Association, Inc.