Reliability and validity for measurement of body composition: A field method

Abstract

Measurement of body composition via a field method has the most popular instruments which are used to estimate the percentage of body fat. Among the instruments used are the Body Mass Index, Bio Impedance Analysis and Skinfold Test. All three of these instruments do not involve high costs, do not require high technical skills, mobile, save time, and are suitable for use in large populations. Because all three instruments can estimate the percentage of body fat, but it is important to identify the most appropriate instruments and have high reliability.Hence, this study was conducted to determine the reliability and convergent validity of the instruments. A total of 40 students, males and females aged between 13 and 14 years participated in this study. The study found that the test retest and Pearson correlation coefficient of reliability for the three instruments is very high, r = .99. While the inter class reliability also are at high level with r = .99 for Body Mass Index and Bio Impedance Analysis, r = .96 for Skinfold test. Intra class reliability coefficient for these three instruments is too high for Body Mass Index r = .99, Bio Impedance Analysis r = .97, and Skinfold Test r = .90.

Correlation of Body Composition and Coordination of Specific Footballers’ Position among Professional Football Players

“…The reliability of the body composition measurement by bioelectric impedance method has been reported. Hashim et al (2017) reported that the test-retest reliability and interclass reliability were high (r= 0.99 and 0.96 respectively) [15]. Furthermore, an intraclass reliability coefficient of 0.97 was reported [15].…”