Changes in body shape of young individuals from the aspect of adult physique model by factor analysis.
The purpose of this study was to clarify characteristics of age-related changes in body shape in adolescence, in 11- to 19-year-old boys and girls, by using previously reported physique models of adult men and women as the scale. The scale consisted of four factors obtained by factor analysis using 30 items as variables, such as the values measured for the physique, skinfold thickness and body composition. The four factors were Factor 1: body fat, Factor 2: mass, Factor 3: leg length to height ratio, and Factor 4: length, and were interpreted in the men and women in a similar manner. The subjects were 307 boys and 368 girls; all were healthy. Thirty items were measured and included the values measured for the physique, skinfold thickness and body composition, as in the men and women. Factor scores in the subjects were standardized by mean and standard deviation for each item in the adult subjects, and calculated for individuals by using the coefficient of factor score in the adult subjects. The body shapes of the boys and girls were investigated from the factor score by age calculated for each factor. The following results were obtained: 1. Factor 1 tended to gradually decrease and reached the adult level at 15 years of age in the boys.(ABSTRACT TRUNCATED AT 250 WORDS)
Tsunawake
N
N
Department of Physical Education, Nagasaki Prefectural Women's Junior College.
Tahara
Y
Y
Yukawa
K
K
Katsuura
T
T
Harada
H
H
Iwanaga
K
K
Kikuchi
Y
Y
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D001823:Body Composition; D015992:Body Mass Index; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D012885:Skinfold Thickness