![]() ![]() However, both groups of swimmers presented higher post-exercise blood lactate concentrations with the ingestion of caffeine when compared with the placebo. After the ingestion of the caffeine, trained swimmers reduced the time needed to complete the trial by approximately 2 %, but this performance benefit was not evident in the untrained swimmers. ( Reference Collomp, Ahmaidi and Chatard 12 ) provided 250 mg of caffeine or a placebo substance to trained and untrained swimmers before a 2×100 m freestyle time trial. Moreover, the scientific information about the ergogenicity of caffeine in swimming is very limited and contradictory.Ĭollomp et al. Nevertheless, the results obtained with these team-sports players can hardly be used to infer the effect of caffeine in other continuous and power-based sports such as swimming. All these investigations have been carried out during team sports matches that combine bouts of high-intensity exercise with periods of lower intensity or recovery during a relatively long period of time. Interestingly, the ergogenicity of caffeinated energy drinks is not present when the amount of energy drink provides only 1 mg/kg caffeine ( Reference Astorino, Matera and Basinger 10, Reference Del Coso, Salinero and Gonzalez-Millan 11 ). ![]() Several investigations have determined the ergogenicity of energy drinks during soccer ( Reference Del Coso, Munoz-Fernandez and Munoz 1, Reference Lara, Gonzalez-Millan and Salinero 5 ), basketball ( Reference Abian-Vicen, Puente and Salinero 6 ), volleyball ( Reference Del Coso, Perez-Lopez and Abian-Vicen 7 ) and rugby competitions ( Reference Del Coso, Ramirez and Munoz 8, Reference Del Coso, Portillo and Munoz 9 ) when ingested in an amount equivalent to providing 3 mg of caffeine/kg of body mass. Although the use of caffeine in sports was considered doping from 1984 to 2004 (when athletes’ urinary caffeine concentration exceeded 12 µg/ml), caffeine was placed on the World Antidoping Monitoring Program in 2004, to track the trends of its use and to assess its future re-inclusion in the banned list ( 4 ). The popularity of caffeine and caffeine-containing products has been also increased because this substance is no longer considered a doping substance ( Reference Del Coso, Munoz and Munoz-Guerra 3 ). In the sport setting, energy drinks have become one of the most used supplements among young and elite athletes ( Reference Hoyte, Albert and Heard 2 ), probably because of the well-recognised ergogenicity of caffeine. ![]() These drinks contain different amounts of carbohydrates, taurine and group B vitamins, although the ingredient of current interest is caffeine ( Reference Del Coso, Munoz-Fernandez and Munoz 1 ). A caffeinated energy drink increased some aspects of swimming performance in competitive sprinters, whereas the side effects derived from the intake of this beverage were marginal at this dosage.Ĭaffeine-containing energy drinks are relatively new commercially available beverages intended to increase activeness, vigour and overall performance in situations of physical and mental stress. In comparison with the placebo drink, the intake of the caffeinated energy drink increased the height in the countermovement jump (49♴ ( sd 5♳) v. A blood sample was withdrawn 1 min after the completion of the ergometer test. After 60 min of ingestion of the beverages, the swimmers performed a countermovement jump, a maximal handgrip test, a 50 m simulated competition and a 45 s swim at maximal intensity in a swim ergometer. In a randomised and counterbalanced order, fourteen male sprint swimmers performed two acute experimental trials after the ingestion of a caffeinated energy drink (3 mg/kg) or after the ingestion of the same energy drink without caffeine (0 mg/kg placebo). This study investigated the effect of a caffeinated energy drink on various aspects of performance in sprint swimmers. ![]()
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