Relationship of Body Mass Index-For-Age to Body Fat Percentage Using Relative Fat Mass in Teenagers in Surakarta

Abstract

Adolescence is a period of rapid growth and physical, psychosocial, and cognitive changes, which can influence nutritional needs. Adolescent groups are one of the leading health concerns because of their unhealthy lifestyles compared to other age groups. One of the problems facing young people is related to weight, such as underweight, overweight, and obesity. This study aims to determine the relationship between the body mass index for age (BMI-for-age) and the percentage of body fat using relative fat mass (RFM) in adolescents in Surakarta. The research method used is quantitative research with a cross-sectional design. The total number of respondents was 117, consisting of 40 males and 77 females. BMI-for-age measurements include age, height, and weight in the formula. Body fat percentages are measured using the Relative Fat Mass (RFM), and body height and waist circumference measurements are included in the form. Spearman's rank test results showed a significant relationship between BMI-for-age and body fat percentage (p<0.05), with a positive correlation. The conclusion is that there is a relationship between body mass index according to age and percent body fat using relative fat mass in adolescents in Surakarta.