The Influence of Carbohydrate Mouth Rinse on Soccer-Specific Exercise
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It has previously been reported that mouth rinsing with a carbohydrate (CHO) solution can improve cycling and running time-trial performance. However, the effectiveness of CHO mouth rinse on improving high-intensity intermittent exercise, such as that found in soccer, has not been examined. Eleven semi-professional soccer players were selected to perform three exercise trials in a fed, postprandial state (2 hr). Each trial consisted of six 16-min intermittent exercise blocks, forming a 96-min soccer simulation protocol (SSP). Immediately prior to and at 16-min intervals throughout each SSP, participants were required to rinse their mouths for 5 s with either a 6.4% carbohydrate solution (CHO), a taste matched placebo (PLA), or no solution (CON). Performance was assessed in the form of six 15 m repeated maximal sprint bouts, positioned in the middle of each 16-min exercise block. Earlobe capillary blood samples were obtained for determination of blood glucose and lactate concentrations. In addition, participants‟ subjective responses were assessed frequently throughout; whist heart rate values were recorded continuously. Repeated sprint performance did not differ between treatments (p > .05). In accordance, no significant differences were evident between subjective response ratings. There were no differences in heart rate or blood metabolite concentrations between any treatments. In summary, mouth rinsing with CHO does not improve soccer-specific exercise. This may bring into question the magnitude of the effect of CHO mouth rinse, particularly in the fed, practical state.
- Masters Degrees (Sport) 
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