Researchers have discovered a gut-to-brain pathway in mice that increases exercise performance. According to a study published in Nature, led by researchers at the Perelman School of Medicine at the University of Pennsylvania, certain types of gut bacteria can activate nerves in the gut to increase
amides . The latter stimulates receptors called CB1 endocannabinoid receptors on gut-embedded sensory nerves, which connect to the brain via the spine. The stimulation of these CB1 receptor-studded nerves causes an increase in levels of the neurotransmitter dopamine during exercise, in a brain region called the ventral striatum.
“This gut-to-brain motivation pathway might have evolved to connect nutrient availability and the state of the gut bacterial population to the readiness to engage in prolonged physical activity,” said study co-author, J. Nicholas Betley, Ph.D., an associate professor of Biology at the University of Pennsylvania’s School of Arts and Sciences. “This line of research could develop into a whole new branch of exercise physiology.
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