Abstract
In recent years information on age at MPV of height as a biological parameter is lacking in Japan. In the present study, the wavelet interpolation method was applied to longitudinal height growth distances in school girls from the first grade to the ninth grade in 2010, and the age at MPV of height was identified from the growth velocity curve in which the distance curve is differentiated. The trend for ten years was examined by comparing age at MPV of height in Japanese girls today and in Japanese girls ten years ago. Moreover, biological parameters in Asian girls were verified by comparing the trends in age at MPV in South Korean girls in recent years. The results showed that the physiques of girls have not increased in size in Japan since around 1990, and that the current age at MPV of height is virtually unchanged from the past in the present study. However, the current age at MPV of height shows earlier maturation than in the past in South Korea, and it is thought that the growth acceleration phenomenon is still progressing. Therefore, if between the same races, considering that age at MPV of height is a parameter that estimates the growth acceleration phenomenon, one may infer that when looking at similar races MPV of height could also be a parameter that estimates the social economic situation of a nation that regulates the human living environment. Thinking in this way, it is inferred that the social economic situation in South Korea lags behind that of Japan by more than 20 years.
