Randomized crossover trial found carbohydrate and caffeine mouth rinses improve performance in athletes after meals, suggesting practical benefits during intense training.
Background Mouth rinsing with carbohydrate (CHO), caffeine (CAF), and their combined (CHO+CAF) solutions has been shown to enhance exercise performance. However, most previous studies were conducted under fasted conditions, which may not accurately reflect the typical practices of athletes who generally consume food before intense exercise or competition. This study examined the effects of CHO, CAF, and CHO+CAF mouth rinses on physiological and perceptual responses during high-intensity interval exercise (HIIE) following a pre-exercise meal.
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Suen et al. (2025) studied this question.
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