أثر حمل بدني مرتفع الشدة تحت درجات حرارة متباينة على بعض المتغيرات البيوكيميائية و الكفاءة البدنية للاعبي كرة القدم تحت 17 سنة

الملخص EN

The study aims to identify the effect of a high intensity physical load under varying temperatures on the concentration level of sodium salts, potassium and lactic acid and the physical efficiency of football players under 17 years old.

different temperatures, different temperature levels (less than (38) (38-39), (40-41) and (42-43) degrees, and the primary study sample was chosen by deliberate method from football players under (17 years) at Yarmouk sports club.

and their number was (30) players, of whom (12) players were chosen at random to conduct an exploratory study, and the number (18) players to conduct the basic study.

the most important results of the study were the following : (1) there was a negative effect of high temperature on the concentration of sodium, potassium and lactic levels in the blood after performing the physical aptitude test PWC170, where the highest concentration of sodium in the blood in favor of the temperature was 38 degrees, then 38-39 degrees, then 40-41 degrees, then 42-43 degrees.

(2) the performance of the PWC170 physical aptitude test at different temperatures did not affect body weight, as it did not show statistically significant differences between the measurements at the four temperatures.

(3) there was a negative effect of high temperature on the level of absolute and relative physical efficiency, where the best level of physical efficiency in favor of temperature was less than 38 degrees, then 38-39 degrees, then 40-41 degrees, then 42-43 degrees.