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由罗列指数的年变化，了解学生年成长的体型变化，由一年级至三年级时，从瘦长型趋型、肥胖型，至四年级则及趋瘦长型、型的体型。