British researchers (Curr Opin Clin Nut Met Care, 13: 44, 2010) found that the nervous system senses carbohydrates (CHO) as soon as they enter the mouth and boosts improved performance.
A study by Brazilian researchers found that the CHO mouth rinse is a bust. It had no effect on maximum strength or strength endurance compared to a placebo (fake CHO mouth rinse) or control (no mouth rinse). Carbohydrates are the main fuels for muscular work during intense exercise above 65 percent of maximum effort. They should be the central dietary component for any intensely training athletes. However, this study showed that you don’t have to eat them— you can just swirl them around in your mouth. (European Journal of Applied Physiology, published online)