Different body shapes,functions and sports ability among young athletes at the same age but with different bone ages were compared to find out the differences and the ways of the changes. As a result,the juvenile athletes at the same age but with different bone ages had different growth characteristics and their body shapes,body functions and sports ability were obviously different. It was shown that there were limitation,one-sidedness and irrationality in the constitution evaluation and the competition grouping,which were processed by the age and bone age. In the constitution evaluation and t...