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Impact of dietary nutrient intake and physical activity on body composition and growth in Indian children.

BackgroundTo investigate interrelationships of dietary composition and physical activity (PA) with growth and body composition (BC) in urban Indian school children.MethodsA cross-sectional study was performed in 4,747 Indian school children (2,623 boys) aged 3-18 years. Weight, height, BC by body impedance analyzer, PA and dietary food intakes by questionnaire method were recorded.ResultsMean daily energy and protein intakes as recommended dietary allowance were significantly lower in both boys and girls (P<0.01) above 6 years, with 55% reduction in micronutrient intakes in older children. When compared with World Health Organization references, lower heights in pubertal boys and girls were related to dietary energy and protein intake. Multiple regression analysis showed positive association of height for age z-scores (HAZ) with midparental height z-scores (β=0.45, P=0.0001) and protein density (β=0.103, P=0.014). HAZ was negatively associated with inactivity (β=-0.0001, P=0.049) in boys and girls (R2 =0.104, P<0.01). Further, body fat percentage was negatively correlated with moderate or light activity and antioxidant intakes (P<0.01) but not with dietary fat intake. Percentage muscle mass was positively correlated with moderate activity and negatively with inactivity (P<0.05).ConclusionAdequacy of protein and antioxidant intakes, reducing inactivity and increasing moderate activity are essential for optimal growth and body composition in Indian children.

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