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This paper outlines the design and results of research related to the consumption of carbohydrates during physical effort which conducts to a high sports improvement. The postponing of the settling and/or reducing fatigue intensity can be described by a series of effects, such as: reducing the use of muscular glycogen results from stimulation of the muscle glycogenogenesis, the prevention of settling hypoglycemia, reducing the overall rate of carbohydrates oxidation, etc. Carbohydrate supplementation received a lot of attention and a large number of studies demonstrated that fatigue was delayed and performance was improved when exercise lasted two hours or longer. Indeed the study revealed that with a carbohydrate mouth rinse, certain areas of the brain such as the reward centres and areas involved in motor control were activated. Factors influencing the favourable effect of the disorders in sports performance are intensity physical effort (only occurs if the benefit effort reduced intensity and especially durable, i.e. if the efforts of up to 75% of VO2max), carbohydrates intake and form of use, but also on the level of the initial results from the muscle.

Keyword: carbohydrates, carbohydrate suppliment, performance evaluation, physical exertion