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An examination was carried out on standing broad jump, flexed arm hang and bent knee sit ups performance of 106 boys tested annually from 10 through 16 years. The results indicated that there was a significant increase in performance for all three physical performance tests over the seven year test period. Trend analysis using orthogonal polynomials revealed significant linear and quadratic components in the standing broad jump and flexed arm hang growth curves with only the linear component significant in the sit ups growth curve. The largest percentage increase occurred between 14 and 15 years for standing broad jump and between 11 and 12 years for flexed arm hang and bent knee sit ups. The maximum increment in performance for the standing broad jump and flexed arm hang was evidenced during the occur­rence of peak height velocity; for bent knee sit ups, one year prior to peak height velocity. The intercorrrelations among the three physical performance tests revealed a high degree of specificity of individual differences. From year to year the stability of individual differences was high within each of the three physical performance tests (average r = .810) but low over the total six year interval (average r z= .427). Subgroups selected from the main sample on the basis of strength/weight and skinfolds differed in all three tests (with the high and low groups respectively being superior). Early maturers were superior to late maturers in standing broad jump performance only while ectomorphs were superior to mesomorphs on flexed arm hang performance only.