The effect of playing football on the concentration of lactic acid and lactate dehydrogenase activity for some players in the Brack Alshati area - Libya

Abstract

Background: The practice of non-strenuous sports such as football is one of the sports that stimulate blood circulation, however, when it is practiced randomly and irregularly, it can lead to the occurrence of some physical damage.

Objective: The study aimed to find out the negative impact of football on some biochemical variables (lactic acid) and the effect of this sport on the activity of the lactate dehydrogenase enzyme by measuring the concentration of these variables before and after playing football in some athletes.

Materials and methods: This study was conducted on a group of athletes (25 person) with an average age of (20-45 years) and individuals, who did not exercise used as a control group. Lactic acid measured and the activity of the lactate dehydrogenase enzyme. Minitab16 statistical analysis software was used to analyze the results.

Results: the results of the study illustrated that a slight increase in the concentration of lactic acid was observed in the samples of people who practice football (13.22. ± 4.12mg / 100 ml) compared with the samples of people who did not playing football (10.90 ± 02.9 mg / 100 ml), while the results showed that the concentration of lactic acid Immediately after practicing sports, where its average concentration was (17.14± 5.33 mg/100 ml), the results showed that there were statistically significant differences between the first group who practiced football (before entering the stadium) and the second group after leaving the stadium. The study also showed that there were statistically significant differences between the all groups. The second group and the control group (P value < 0.05), while no statistical differences were observed between the first group (before entering the stadium) and the control group. The results of analyzing the effectiveness of the lactate dehydrogenase enzyme showed that there were significant differences between the first group (before entering the stadium) and the second group (after exercising).

Conclusion: The study concluded that the concentration of lactic acid and the activity of the enzyme lactic dehydrogenase increase with exercise when compared with non-exercising subjects. The study also confirms that the practice of football works to stimulate the muscles to increase the effectiveness of the enzyme and also increase the concentration of lactic acid.