Marathon runners experience a unique energy boost from their brains, according to new research published in Nature Metabolism. Neuroscientist Carlos Matute studied 10 marathon runners and found that the brain’s myelin coating decreased temporarily in areas responsible for motor coordination, sensory integration, and emotional processing.
Myelin makes up 40% of the brain’s composition and plays a crucial role in electrical signal transmission. The researchers observed a significant decrease in myelin levels in areas essential for movement and sensory perception. However, it’s essential to note that this effect is temporary, so runners don’t need to worry about their brains being permanently damaged.
The study’s findings may hold clues for understanding conditions like multiple sclerosis, where myelin degradation persists. Matute hopes that his research can contribute to a better understanding of these complex neurological disorders and lead to potential treatments.
Source: https://www.npr.org/2025/04/04/1242780129/marathon-runners-brains-myelin