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Swish a sugary beverage around in your mouth — you don’t even have to drink it.
Via NBC News:
Simply swishing a glucose-laden drink in the mouth and spitting it out boosted self-control and willpower for tasks from squeezing a handgrip to completing impossible brain teasers, the new study found.
And:
“So, practically, when people think that they are going to engage in a demanding task requiring self-control for a period of time (such as doing some boring filing, doing exercise, and resisting tempting foods when on a diet ), they should introduce sugar into their mouths by some practical means,” Hagger wrote in an email to LiveScience.
Swishing and spitting sugary drinks might not always be practical, Hagger noted, but sugar-infused gum or hard candies would likely do the trick as well, although they would involve consumption of the sugar.
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