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由罗年变化，了解学生年成长体型变化，由一年至三年，瘦长型趋向适中型、肥胖型，至四年则及趋向瘦长型、适中型体型。