一部 農村地域 靑少年의 成長發育과 最大成長發育年齡에 관한 類似縱斷的 硏究

A Semi-longitudinal Study on Physical Growth and Development and Maximum Growth Age of Teenager’s Physique in a Rural

&nbsp;&nbsp;This study was carried out to know physical growth and maximum growth age of the growth-accelerating phenomena by semi-logitudinal research method. The subject of study were 310 person(male;109, female;201) who are living in Yue-Joo Kun and were born from March 1 in 1976 to Februry 28 in 1976 and grew up until the third grade of high school.<BR>&nbsp;&nbsp;The results are as follows:<BR>&nbsp;&nbsp;1. Physical growth and development Body height grew one-step direct-development and body weight, chest-girth and sitting height grew two-step direct-development. Female excelled male in two-step development.<BR>&nbsp;&nbsp;The age of cross-over between two sexes was between 9.5 to 13.5 in body height, between 9.5 to 14.5 in body weight, between 11.5 to 15.5 in chest-girth, between 9.5 to 14.5 in sitting height, but crossover was not found in chest-girth. During this periods, female exelled male but after the periods, male excelled female again.<BR>&nbsp;&nbsp;2. Maximum growth age of physical growth and development<BR>&nbsp;&nbsp;In body height, MGA was 12.81 for male and 10.18 for female which showed that MGA for female appeared about 2 years earlier than for male.<BR>&nbsp;&nbsp;In body weight, MGA was 13.35 for male and 11.93 for female which showed that MGA for female appeared about 1 year earlier than that for male.<BR>&nbsp;&nbsp;In chest-girth, MGA was 13.32 for male and 11.57 for female which showed that MGA for both sexes appeared in similar periods.<BR>&nbsp;&nbsp;In sitting height, MGA was 12.40 for male and 10.14 for female which showed that MGA for both sexes appeared in similar periods.<BR>&nbsp;&nbsp;Maximum growth ages of physiques appeared in order of sitting height＞body height＞chest-girth＞body weight.