日本人青少年の形態発育と機能発育の解析的研究

概要

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About 700 Japanese boys and girls aged from 6 to 18 years were examined. The average value (Y) of different characters including weight, muscle strength, etc., corresponding to each height class (X) was plotted on a logarithmic graph to obtain the allometric expression Y = bx^a, where a is a growth index and b is a constant. In most cases the plotting showed a straight line having a break (critical point) at height 140cm. At this critical point, the index of both morphological and functional growth become increased in boys. In girls, the constant of functional growth while the constant for morphological growth was increased. The difference found in different sex are considered due to quantitative change such as body proportion, body composition, etc. In addition to the above factors, certain qualitative changes in the neuromuscular function accompanied with maturation or learning were also suggested to be an important factor.
1966-09-25