High school rugby players were classified into three groups (precocious, average, and late) according to the onset of maximum age of development, and their anthropometric measurements were compared. Most were classified into the precocious and average types, suggesting that many high school rugby players are precocious.
(Mariko, I., Kumiko, O., Kunitaka, M., Yoshika, M., Yumiko, M., Masaharu, K.)