Ontogenetic development of physical efficiency in the age from 3 to 80 years against the background of the development of body structure traits ; Rozwój osobniczy sprawności fizycznej od 3 do 80 roku życia na tle rozwoju cech budowy ciała

Physical efficiency is a proof of the maturity degree and efficiency of the organism demonstrated primarily in physical efforts. The evaluation of the physical development according to the morphological criterion is based on the measurements of different traits of body structure. Statistical analysis of morphological traits has shown that the trend of ontogenetic development of these traits agrees with the course of the logistic curve. The maximum growth rate of the studied morphological traits (puberty leap) is reached earlier by women which is connected with their shorter growing period. Among the motoric traits studied in this work, the logistic curve can be adapted only for the development of the grip of finger flexors, changes in the remaining traits referring to other aspects of motorics in the human ontogenesis are more complicated and cannot be easily described with the help of one function for the total development. In the development of the abdominal muscle force in women and in men, the following periods can be distinguished: the childhood period lasting until about the 12th year of age chąracterized by a drop in the value of this trait for children. of both sexes. After the age of 12 years, in girls - the force of abdominal muscles is slightly better and it is maintained at this. level until an old age, whereas in boys after the age of 12 years the value of this trait increases, and about the age of 25 years men reach a second maximum of force (the first maximum is characteristic for the pre-school age). This high value of the force of abdominal muscles in men is maintained until about the 45th year of age, then it distinctly falls down. In the ontogenetic development of the speed measured by the, time of executing 10 knee bendings, three periods can be distinguished in women and in men. In the pre-school age there occurs a shortening of the time for executing 10 knee bendings, the shortest time is reached in the age of about 11-12 years for both sexes (the rate of progressive development of this ...