The Effects of Carbohydrate Mouth Rinse on Pattern Recognition Performance and Mood State (BRUMS) in Male Collegiate Basketball Players

Kan, Jason Sui Fai (2026) The Effects of Carbohydrate Mouth Rinse on Pattern Recognition Performance and Mood State (BRUMS) in Male Collegiate Basketball Players. Final Year Project (Bachelor), Tunku Abdul Rahman University of Management and Technology.

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Abstract

This study aimed to examine the effects of carbohydrate mouth rinse (CMR) on pattern recognition performance and mood state following induced intermittent fatigue in male university basketball players. A randomised, double-blind, placebo-controlled crossover design was used with ten male basketball players (N=10, Body mass, Height Age: 21.3 ± 1.4 years). Participants completed two conditions: carbohydrate (CHO; 25 mL, 6.4% maltodextrin) and placebo (PLA; 25 mL, 0.05% sucralose). Participants rinsed the solution in their mouth for 10 seconds before expectorating immediately after completing the Yo-Yo test., with a 72-hour washout period. Fatigue was induced using the Yo-Yo Intermittent Recovery Test Level 1 to volitional exhaustion. Pattern recognition performance (Total Hit before rinse and after rinse) was measured using the SMARTfit system, while mood state was assessed using the Brunel Mood Scale (BRUMS). Data were analysed using paired-samples t-tests and repeated-measures ANOVA. Results showed no significant difference in pattern recognition performance between CHO and PLA conditions, with the mean change score for CHO (0.40 ± 1.65) similar to PLA (0.50 ± 1.43), t(9) = -0.148, p = 0.885, and a trivial effect size (d = -0.047). Similarly, BRUMS analysis revealed no significant interaction effects between condition and time across all six subscales (all p > 0.0083). However, a significant main effect of time was observed for fatigue, F(1,36) = 10.627, p = 0.002, confirming the effectiveness of the fatigue protocol. Descriptive T-score analysis showed increases in negative mood states following fatigue, particularly fatigue scores for CHO (44.12 to 53.48) and PLA (46.53 to 55.88), while vigor showed only minimal changes (CHO: 48.96 to 51.96; PLA: 48.04 to 51.04). The iceberg profile was not observed, indicating a suboptimal psychological state under fatigued conditions. Overall, these findings suggest that CMR did not provide a meaningful cognitive or psychological advantage in fatigued male collegiate basketball players.