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由指数年变化，了解学生年成体型变化，由一年级至三年级时，型趋向适中型、肥胖型，至四年级则及趋向型、适中型体型。