04 Sep '15, 8pm

This is why you might want to do your next morning run sans breakfast.

In a new study, published in the journal Cell Metabolism , researchers examined the impact of leptin on the brains of mice—as mice have leptin just like humans. Scientists disrupted leptin signaling in one group of mice, tricking their brains into thinking their leptin levels were low. The mice in this group ended up running double the mileage on their running wheels than mice in another group whose leptin levels were unaffected. Additionally, when given a choice between a chamber with a running wheel in it and one with a locked, unusable wheel, the mice with lower leptin preferred to spend most of their time in the chamber associated with running. These findings reveal that lower leptin makes mice want to run farther, suggesting they enjoy it more. Stephanie Fulton, a neurobiologist at the University of Montreal and senior author of the study, believes this could also app...

Full article: http://www.runnersworld.com/sports-psychology/why-are-mor...

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