أثر الكافيين المصاحب لحمل المنافسة في بعض المتغيرات الكيموحيوية و المسافة المقطوعة و سرعة الجري لدى لاعبي كرة القدم الشباب

الملخص EN

The topic of research was focusing on one of the scientific research fields, which was confirmed by a lot of studies and research during the last decade, and that was the nutritional supplements for athletes; among the most important of these supplements was caffeine because of its important role in increasing the efficiency of the nervous system and increasing the oxidation of fat on glycogen account.

The use of caffeine emerged in recent years as a dietary supplement works to strengthen energy sources and increase athletic ability to withstand the performance as studies indicated that caffeine containing material (xanthine) that directly affect the central nervous system (CNS) and at various metabolic processes and general result is to maintain glycogen due increase the oxidation of fat and lower antioxidant carbohydrates.

The research problem was that most of the players of the research population were suffering from the problem of falling physical level, especially in the latter half of the second half and this was confirmed by many observers and specialists.

The experimental method was used due to its suitability to the nature of the problem.

The research sample was from the young football players, who were 34 players; 20 were chosen intentionally.

The research sample was 58.82 out of the research population.

After that, the research sample was divided into two equal groups: the experimental group and the control group.

The results concluded in this research were that using caffeine as a nutritional supplement helps in increasing the functional ability and increasing the running distance, and the running speed among the research sample as well.