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由数年变化，了解学生年成长体型变化，由一年级至三年级，长型趋向适中型、肥胖型，至四年级则及趋向长型、适中型体型。