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Moderate-intensity exercise has positive health benefits, whereas extreme exercise enhances oxidant production, which contributes to elevated cardiac output in the blood and consequently causes transient damage to cardiac muscles. Functional sports drinks are a palatable and convenient way to hydrate and recover carbohydrates, electrolytes, protein and other nutrients that have been lost throughout physical activity. This paper provides a review of the effect on cardiac biomarkers following endurance exercise as well as the effectiveness of oral rehydration drinks in reducing cardiac muscle injury. Based on the review conducted, we conclude that cardiac biomarkers levels are elevated following high-intensity exercise. Besides that, oral rehydration drinks appear to have an enhancing effect on endurance performance with the lowering of cardiac biomarkers concentration. [ABSTRACT FROM AUTHOR]