بناء مستويات معيارية لتركيب الجسم و التمثيل الغذائي خلال الراحة لدى طلبة الصفوف الأربعة الأولى في المدارس الحكومية الفلسطينية

الملخص EN

The purpose of this study was to construct norms of Body Composition (PC) and Resting Metabolic Rate (RMR) amongst the fourth basic grades in governmental schools in Palestine.

Furthermore, it aims to determine the differences in PC, RMR, Body Mass Index (BMI), and Body Surface Area (BSA) according to the class and gender variables.

Lastly, it also targets to determine the contribution of BMI in predicting Fat Percent (% Fat) and RMR.

The sample consisted of 2200 male and female students from 11 educational governorates in West-Bank.

Tanita DC-360 Bioelectrical impedance analyzer (BIA) was used to determine PC, WHO equation to determine RMR and BMI equation were used for variable measurement.

The results revealed that the means of Height (Ht), Body Mass (BM), Lean Body Mass (LBM), % Fat, Body Water Mass (BWM), (BMI), BSA and RMR for male were respectively: (126.38 cm, 26.99 kg, 20.50 kg, 18.38%, 15.92 kg, 16.67 kg/m2, 0.97 m2, and 1107.22 kcal/day), and for female were respectively: (125.25 cm, 26.48 kg, 19.61 kg, 20.60%, 15.15 kg, 16.65 kg/m2, 0.95 m2 and 1092.22 kcal/day).

Furthermore, the results indicated significant differences in all variables between male and female in favor of male except the % Fat in favor of female, and according to the class in all variables except the % Fat in favor of the higher one.

Also, the results contribute in developing four models for the prediction of % Fat and RMR, using BMI as independent variable, the models were as follow: Male: (%BF) = (-11.795) + ((BMI)× (1.810)).

(R2 =0.804).

(RMR) kcal/day = (266.487) + ((BMI) × (716.466)).

(R2 =0.766).

Female: (%BF) = (-15.413) + ((BMI)× (2.163)).

(R2 =0.873).

(RMR) kcal/day = (257.375) + ((BMI) × (50.126)).

(R2 =0.741).

Based on the findings of the study the researchers recommended using the norms as benchmarks to monitor development, nutrition, obesity and health among students.