HUBUNGAN ANTARA RESTING METABOLIC RATE (RMR) DENGAN KOMPOSISI TUBUH PADA ANAK OBESITAS

Abstract

Background: Obesity occurred due to imbalance of energy in long term when energy intake was higher than energy expenditure. One of step to prevent obesity was to regulate energy expenditure, which set the RMR as the largest expenditure of the body. By knowing how RMR itself and whether there was a correlation of RMR with body composition in obese children was expected to suppress the rate of obesity in children. Method: This was study with cross sectional design. The subjects were all of students on primary school of Bernardus at Semarang who sat in fifth and sixth grade with obesity in August 2010. Subject of this study was conducted the examination of resting metabolic rate (RMR) with indirect calorimeter and body composition from Bioelectrical Impedance Analysis (BIA) Tanita BC 545. The data was described in the form of table and chart and analyzed by Pearson correlation test with a value of p<0,05. Result: Total of respondent on this study was 32 children approximately on the age of 10,7 years. The mean of body weight for boys were 52,9 kilograms and for girls were 56,3 kilograms. The mean of body mass index was about 26,3 kg/m 2 for boys and 26,4 kg/m 2 for girls. The result showed that there was a significant correlation between resting metabolic rate (RMR) and body weight with r=0,644 and there was also a significant correlation between resting metabolic rate (RMR) and fat free mass index/ FFMI with r=0,501. Conclusion: There are some variations of body composition characteristics. Resting metabolic rate (RMR) in obese children is lower than normal children. This RMR is related to body weight and free fat mass index.