Carbohydrate Mouth Rinsing and Cognitive Response During Exercise

A 6.4% maltodextrin solution (64 g/L) was prepared using Nutricost Maltodextrin Powder. Participants performed five mouth rinses per trial, each using 25 mL of the solution for 10 seconds before expectorating. Each rinse was followed by a 30-second rest. Participants were instructed not to swallow the solution. Rinsing procedure was standardized across all sessions.

A placebo solution containing 0.05 g/L of non-caloric sucralose in distilled water was used to match sweetness and viscosity of the CHO-MR. Participants performed five rinses of 25 mL for 10 seconds each, spitting out the solution after each rinse. 30-second rest intervals followed each rinse. Swallowing was not allowed. Rinse frequency, volume, and duration were standardized.

"Participants listened to high-tempo music (120 bpm) for 15 minutes before exercise using standardized earbuds. Music was selected from a public YouTube playlist titled 120 BPM Best Dance Music for Running and Working Out. Volume was calibrated at 65 dB (50% of max device volume). Auditory conditions were standardized across all participants."