Abstract: The author made careful observations and measurements on the facade and flank X-ray photographs of the tibias of 45 boys (including the control group, weight-lifting group and jumping group in accordance with their sports specialities). Statistical analyses of the related indices were taken.
There is no difference between sports (weight-lifting and jumping) and control groups with regard to the proportions of inner and outer transverse diameters at upper part of tibia. The differences between weight-lifting and control groups at middle and lower parts of tibia are significant. The ratio of inner to outer sagittal diameters in sports groups is lower than that in control group. The differences are mainly due to the increase of the thickness of the bone wall.

Key words: Tibia; Anthropometry