Marathon runners' bodies have a surprising snack — their own brains : Short Wave - NPR

Running an entire marathon takes a lot of energy. Neuroscientist Carlos Matute knows this: he's run 18 of them. He wondered how runners' bodies get the energy they need to make it to the finish line. Runners compete in the New York Marathon in New York City on November 3, 2024. New research suggests that marathon runners may deplete a fatty substance in their brain called myelin. Photo by DAVID …