High school rugby players were physically measured and compared in terms of body size and shape by grade and position based on somatotype. The 2nd year FW had a more fatty build compared to the other grades. The 2nd year FW was leaner than the other grades, and the 1st year BK may have been thinner and less muscular than the other grades.
(Mariko, I., Kumiko, O., Kunitaka, M., Yoshika, M., Yumiko, M., Masaharu, K.)