Stability of human proportions through adolescent growth

Male and female subjects (n = 125) were measured on a battery of anthropometric tests every six months for a period of five years. Using maturity status as the temporal component (pubescent assessment stages one through five), proportionality characteristics of subjects were monitored as they matured toward the adult form. Subjects were assigned to one of the Hi, Mid and Lo sub-groups based on their score at PA stage one for each of 15 proportionality characteristics. Subsequently, those in the Mid group were removed from the analysis, while male and female subjects were pooled for the final ANOVA model. The results showed that a number of variables remained stable from PA stages one through five. That is, differences between the Hi and Lo groups were maintained throughout maturation. Predominantly, these included the proportional body segment breadth measures. Proportionality characteristics of the upper limbs appeared to stabilise from mid-adolescence. However, those related to the lower limb were not stable. In other words, a significant difference for the lower limb variables at PA stage one was not maintained through stages four and five. The results raised some doubts as to the suitability of using lower limb proportions as selection criteria in talent identification programs.