Carbohydrate (CHO) mouth rinsing seems to improve performance in exercises lasting 30–60 min. However, its effects on intermittent exercise are unclear. It is also unknown whether serial CHO mouth rinses can promote additional ergogenic effects when compared with a single mouth rinse. The aim of this study was to evaluate the effect of single and serial CHO mouth rinses on Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1) performance in soccer players. In a randomized, crossover, double-blind, placebo-controlled design, 12 male (18.9 ± 0.5 years) soccer players performed eight serial mouth rinses under three different conditions: placebo solution only (noncaloric juice), seven placebo mouth rinses plus a single CHO mouth rinse (8% maltodextrin), or eight CHO mouth rinses (8-CHO). Following the final mouth rinse, individuals performed the Yo-Yo IR1 test to evaluate the maximal aerobic endurance performance measured via total distance covered. There were no differences in Yo-Yo IR1 performance between sessions (p = .32; single CHO mouth rinse (8% maltodextrin): 1,198 ± 289 m, eight CHO mouth rinses: 1,256 ± 253 m, placebo: 1,086 ± 284 m). In conclusion, single and serial CHO mouth rinsing did not improve performance during the Yo-Yo IR1 for soccer players. These data suggest that CHO mouth rinsing is not an effective ergogenic strategy for intermittent exercise performance irrespective of the number of rinses.

碳水化合物 (CHO) 漱口似乎可以提高持续 30-60 分钟的运动表现。然而，它对间歇性运动的影响尚不清楚。与单次漱口水相比，连续 CHO 漱口水是否能促进额外的增效作用也是未知的。本研究的目的是评估单次和连续 CHO 漱口水对足球运动员悠悠球间歇恢复测试 1 级 (Yo-Yo IR1) 表现的影响。在一项随机、交叉、双盲、安慰剂对照设计中，12 名男性（18.9 ± 0.5 岁）足球运动员在三种不同条件下进行了八次连续漱口：仅安慰剂溶液（无热量果汁）、七次安慰剂漱口水和一次CHO 漱口水（8% 麦芽糖糊精），或 8 次 CHO 漱口水（8-CHO）。在最后一次漱口之后，个人进行了 Yo-Yo IR1 测试，以评估通过总距离测量的最大有氧耐力表现。会话之间的 Yo-Yo IR1 表现没有差异（p  = .32; 单次 CHO 漱口水（8% 麦芽糊精）：1,198 ± 289 m，八次 CHO 漱口水：1,256 ± 253 m，安慰剂：1,086 ± 284 m）。总之，单次和连续 CHO 漱口并没有提高足球运动员 Yo-Yo IR1 期间的表现。这些数据表明，无论漱口次数如何，CHO 漱口都不是间歇性运动表现的有效增能策略。