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THE EFFECTS OF A CARBOHYDRATE MOUTH RINSE ON SOCCER-SPECIFIC SKILLS FOLLOWING A MORNING HIGH-INTENSITY PRACTICE

Abstract

Lynnsey Bowling, Eric M. Scudamore, Brian Church, & Veronika Pribyslavska

Arkansas State University, Jonesboro, Arkansas

Carbohydrate mouth rinse (CMR) has been shown to enhance aerobic performance lasting ≥ 30 minutes and some anaerobic and skill-related performance. The effects of a CMR on soccer specific skills have yet to be evaluated. PURPOSE: This study will examine the effects of a CMR on soccer-specific skills following a morning high-intensity soccer practice in fasted collegiate female soccer players. METHODS: Collegiate female, division I soccer athletes will be recruited for the study. First, participants will complete a baseline session including four soccer-specific drills: 1) passing drill; 2) T-test agility drill; 3) juggling drill; and 4) shooting drill. At least 42 hours later, participants will complete two counterbalanced, double-blind experimental sessions, each separated by 7 days. In the morning, after an overnight fast, participants’ fasting blood glucose will be analyzed. Afterwards, participants will complete a coach-led warm-up, followed by a 30-minute high-intensity soccer practice. Participants will then rinse with either a carbohydrate (CHO, 6% maltodextrin) or taste- and color-matched placebo (PLA) rinse, and then perform the same soccer-specific skills from the baseline assessment. Thirst sensation (TS), rating of perceived exertion (RPE) and heart rate (HR) will be assessed throughout each session. A RMANOVA will compare passing, agility, juggling, and shooting test scores across baseline, CHO, and PLA sessions. If necessary, a Bonferroni post-hoc analysis will be implemented. Effect size will be calculated for the mean difference between the CHO and PLA treatment-dependent variables by using partial eta squared. A Wilcoxon matched pairs signed-ranks test will compare RPE and TS scores. RESULTS: It is expected that the CMR will result in improved soccer skill performance compared to the PLA trial. Skill performance between CMR and baseline is expected to be similar. Glucose levels, HR, RPE and TS are expected to be similar across all trials. CONCLUSION: If improvements in performance are observed, coaches and players may consider implementing a CMR during high-intensity games and practices when fatigue is likely to occur. A CMR could, therefore, be used as an alternative to consuming a CHO beverage or meal prior to training or games, to avoid gastrointestinal discomfort.

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