Effect of special resistance exercises on extreme forces and some of the mechanical determinants of the stage of disposal and digital achievement of spear competitors

          The highest strength of the nervous and muscular system to counter the maximum external resistance such as (weights - medical balls - dumbbells - sandbags - weight belt) or exercises using the body's own resistance (14: 31)
           Is the science that is interested in studying the analytical and mathematical description of the different types of movement, using different variables such as displacement, speed and wheel, which were based on measurements of distance and time without exposure to the causes of motion (27: 129)
        The researcher used the experimental method using the experimental design of the pre-test and the pre-test for one experimental group in order to suit the nature of the study.
was chosen in a deliberate way from the total research community, which numbered (21) students in the field of athletics in the second grade, third in the secondary school of sport in Zagazig for the academic year 2016/2016 and 10 experimental students were selected. The numerical level of the spear-throwing competition in addition to (7) other students for the pilot experiment, and excluded the number of (4) students for irregular attendance and the following tables (1), (2) describes the characterization and homogeneity of the sample in the variables of growth and physical variables The digital level in research.