Carbohydrate Mouth Rinsing and Cognitive Response During Exercise

Carbohydrate Mouth Rinsing Enhances Prefrontal Cortex Oxygenation and Cognitive Performance, Reducing Perceived Exertion During High-Intensity Exercise

This study investigates whether rinsing the mouth with a carbohydrate solution can improve brain oxygenation and cognitive function during high-intensity exercise. Eleven trained cyclists participated in multiple exercise sessions under different mouth rinse conditions. Brain oxygenation, perceived exertion, and cognitive performance were measured. The goal is to understand if this simple technique can support both physical and mental performance during demanding exercise.

Inclusion Criteria:

• Aged between 20 and 30 years
• Engaged in regular cycling training (≥5 sessions per week, ~4 hours per day)
• No known cardiovascular, neurological, or metabolic diseases
• Provided written informed consent

Exclusion Criteria:

• Current use of medication affecting cardiovascular or cognitive function
• Recent musculoskeletal injuries that affect cycling ability
• Smoking or excessive alcohol consumption
• Refusal or inability to comply with study procedures