Differences of Athletes’ Blood Lactic Acid Levels Before and After 1500 M Run

The high intensity of training and competitions that athletes in various branches undergo exercise often carries a high risk of injury and fatigue. Efforts to recover from fatigue are required after athletes undergo training and competitions so that the athlete's body is back to normal. This study aimed to analyze the differences in blood lactic acid levels before and after the 1500 M run. This study used a quantitative method with a cross-sectional design. The research subjects were soccer athletes who were actively exercising. The variables to be studied were blood lactic acid levels and the identity data of the research subjects. This study included all soccer athletes in the FIK UNP Soccer Activity Unit, totaling 51 people. The sample is part of the population, namely 12 people taken purposively. The subject's identity data were collected using a questionnaire and data measurement of lactic acid levels using Accutrend Lactacid. Measurement of lactic acid levels was carried out before running 1500 meters and after resting for one hour. The results showed that the lactic acid levels after running the 1500 m run increased five times than the lactic acid levels before doing the 1500 m run. However, statistical analysis test results after measuring the lactic acid levels after an hour of rest, the lactic acid levels returned to normal conditions. The results of statistical tests showed that there were differences in blood lactic acid levels before and after running 1500 meters in athletes (α <0.05). Keyword: Lactic Acid Levels, Running 1500 m