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，解学生成长体型，由一三时，从瘦长型趋向适中型、肥胖型，四则及趋向瘦长型、适中型体型。