Effect of exercises according to the fatigue index to improving energy conservation, rapid fatigue, endurance of special speed and achievement for 200m runners under 20 years

Abstract

One of the most important goals of sports training is to prepare the athletes physically to achieve the best achievement in the specialized event through the use of appropriate and ideal training methods and methods that are compatible with its energy system to improve its requirements, and the effectiveness of running (200 m) is one of the events that requires extreme training and one of its most important requirements is to improve ( Energy conservation variables, rapid fatigue and endurance of special speed) so that runners can run at maximum speeds and endure these speeds for the longest possible period of time despite the appearance and accumulation of the concentration of lactic acid (LA) in the blood and muscles as a result of the maximum effort exerted by the runners during training or competition to achieve the best achievement athlete, therefore, the researcher turned to studying these variables by using exercises with the fatigue index and identifying their effect, as well as identifying the preference of these exercises over the exercises adopted by trainers in improving the variables under study, the researcher used the experimental method in the manner of the two equal experimental and control groups, and he chose his research sample from the Karbala governorate clubs by the comprehensive inventory method. One of the most important research procedures was to determine exercises according to the fatigue index for various distances, and to determine the tests for energy conservation variables, rapid fatigue, and endurance of special speed, the researcher used the appropriate parametric statistical methods for the work, namely (arithmetic mean, standard deviation, Levin's law to find homogeneity, and (t) law for symmetrical and independent equal samples to find equivalence between the two groups, as well as finding differences between the tribal and remote tests and between the post-tests between the experimental and control groups). Among the most important conclusions, exercises according to the fatigue index contributed to improving the variables of energy conservation, rapid fatigue, endurance of special speed and achievement, with the preference of these exercises over the exercises used by trainers. The most important recommendations are the adoption of exercises according to the fatigue index in improving the variables under study and the necessity of paying attention to them by the trainers and those concerned with the specialization, and applying these exercises to other activities and to different age groups.

Keywords : fatigue index, energy conservation, special speed.