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罗列指数年变，了年成长体型变，年级至三年级时，从瘦长型趋向适中型、肥胖型，至四年级则及趋向瘦长型、适中型体型。