女子学生の体構成及び Rohrer 指数の検討第2報年間変動の追跡

概要

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Body Composition and Rohrer index have been compared between 86 athletic students and 96 nonathletic students of the female sex, aged from 18 to 20 years old. We have measured their height, weight, and skinfold (upper, back and abdomen), and then calculated from these measurements Rohrer index, total body fat (%), lean body mass (LBM), and LBM index. Skinfold has been obtained at the pressure of 10 g/mm2 with an Eiken cahper. The results are as follows: (1) Athletes are taller and heavier than nonathletes. Body weight shows annual changes both in athletes and nonathletes. (2) Rohrer index is higher in athletes than in nonathletes and it also shows annual changes. (3) Mean skinfold (abdomen) is thinner in athletes than in nonathletes. (4) Body fat (%) decreases from spring to summer and increases from early autumn to winter showing a peak in April. Mean body fat (%) is higher in nonathletes than in athletes. (5) The correlations between body weight and skinfold (arm+back), and between Rohrer index and body fat (%), are calculated. (6) LBM (kg) is heavier, and LBM index larger in athletes than in nonathletes. We pay our attention to the increasing tendency of LBM (kg) in athletes.