This can be replicated without consuming any glucose, by simply washing something carbohydrate around the mouth. It's called the "Carbohydrate Mouth Rinse"[1].

This can be replicated without consuming any glucose, by simply washing something carbohydrate around the mouth. It's called the "Carbohydrate Mouth Rinse"[1]. If I can summarise, from memory, it tricks the brain into thinking more fuel is being added so it's okay to release more of the stored fuel it was holding back. > Routinely rinsing a carbohydrate-containing solution around the oral cavity for between 5-10 s has been shown to improve high intensity endurance performance lasting 30-70 min. > The magnitude of the performance benefit is similar to that of carbohydrate ingestion, although athletes who are prone to gastro-intestinal (GI) distress during high intensity exercise may want to consider rinsing because of the reduced risk of GI discomfort. > These effects appear to be specific to carbohydrate and independent of taste or sweetness. [1] https://www.gssiweb.org/sports-science-exchange/article/sse-118-carbohydrate-mouth-rinse-performance-effects-and-mechanisms https://www.gssiweb.org/sports-science-exchange/article/sse-...