Reference norms of fat mass index and fat-free mass index for girls

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doi:2009.18.2.256

Exerc Sci > Volume 18(2); 2009 > Article

Exercise Science 2009;18(2): 256-264. doi: https://doi.org/10.15857/ksep.2009.18.2.256

여학생의 신체구성평가지표로서 체지방량지수와 제지방량지수

김난수¹, 김현수²

¹부산가톨릭대학교
²서울산업대학교

Reference norms of fat mass index and fat-free mass index for girls

ABSTRACT

Expressing fat-free mass (FFM) and body fat mass (FM) as percentages of body weight is unsatisfactory. The aims of this study were to establish reference norms for FFM index [FFM (kg)/height (m)2, or FFMI) and fat mass index [FM (kg)/height (m)2, or FMI] in a large population of healthy girls, to observe differences in these values in three age groups between 7 and 15 years, and to develop percentile distributions for these parameter. One thousand two hundred twenty-two girls with a wide spectrum of stature, body weight, and body composition underwent bioelectrical impedance analysis (BI) for the determination of FFM and FM. The reference norms (25th-75th percentile) for the FFMI (8.1-11.5) was significantly different in 3 age groups (7-9, 10-12, and 13-15 yrs) (p<.001). FMI increased by an average of 13.7% compared to an increase in BMI of 18.7%. FFMI and FMI have the advantage of expressing both aspects of body composition in common units. The data presented as percentiles can serve as reference in comparing a child's body composition to that of healthy children of the same gender. These body composition ranges can be used by clinicians and nutritionists as reference values for girls.

Key words: fat-free mass index, fat mass index, girl, body composition