Abstract
The present study investigated the validity, reliability, objectivity, and practicability of methods with skinfold caliper (SF), ultrasound (US), bioelectrical impedance (BI), and sulfur hexafluoride (SHD) using identical subjects, and evaluated comprehensive usefulness by comparing selected methods or equations. In examining validity, underwater weighing (UW) was employed to obtain the criterion of validity. The subjects were healthy Japanese, 16 males and 15 females, aged 18 to 32 years. The prediction equation developed by Nakadomo et al. (1990b) was considered to be suitable for BI. With respect to the validity, BI and SHD assessing total body when estimating body composition would be more valid than those assessing partial subcutaneous skinfold thickness. A comprehensive evaluation through an examination with respect to the validity, reliability, objectivity, and practicability suggests that the BI could be the best method to assess human body composition in vivo.
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