The effects of test-retest, technician’s skill, and different measurement methods on % body fat prediction


JIITA, vol.4 no.2, pp.354-360, 2020, DOI: SOON

The effects of test-retest, technician’s skill, and different measurement methods on % body fat prediction

PengWei Song 1), Changmo Cho 2,*)
1) Physical education. Guangxi Science & Technology Normal University, Guangxi, China
2) Physical education. Keimyung University, Daegu, Republic of Korea

Abstract: The purpose of this project was to compared the difference in percent body fat (% body fat) measured in two different days in same subject, the difference in % body fat measured from five different testers for the same subjects, and the differences in % body fat measured four different methods. Healthy men (n=7) and women (n=3) aged 25-49 years were participated in this project. Skinfold (SKF), circumference, and bioelectrical impedance analysis (BIA) methods were measured from these subjects, and under water weighing was performed in five of the subjects. Three different statistical analyses were performed to achieve the goals of this project. First, paired t-test was used to compare the differences between the % body fat measured by SKF and circumference that measured in two separate days by same testers. Second, the difference of % body fat by SKF method measured by five different testers for the same subjects was analyzed using one-way ANOVA. Finally, one-way repeated ANOVA was performed to analyze the difference in % body fat measured by four different methods by same testers. There was no significant difference in the differences between the results of % body fat measured by SKF and circumference in two separated days. The difference of % body fat measured by SKF measured by five testers for the same subjects was not statistically significant. The difference among the results of % body fat measured by four different methods also did not significant. These results suggest that SKF, body circumference, and BIA analysis are a stable, valid and reliable body composition measurement method.

Keyword: obesity; body composition measurement technique; body fat;