That to know by the somatotype transformed, one grade raised to 3rd grade, ectomorph type trend to Mesomorph type or Endomorph type, Until 4th grade trend to Ectomorph type or Mesomorph type. 4.

㈢由列指数年变化，了解学生年成体变化，由一年级至三年级时，从趋向适中、肥胖，至四年级则及趋向、适中体。