Endurance Exercise May Lead the Brain to Consume Its Own Tissue: A Groundbreaking Study
In a fascinating new piIot study, neuroscientists suggest that the human brain may begin to “eat itself” during strenuous endurance exercises such as marathon running. This revelation comes from a team of researchers in Spain who observed intriguing changes in the brain’s white matter among marathon runners. Their findings present a novel form of neuroplasticity that could be crucial for maintaining cerebral functionality under extreme physical stress.
The researchers, led by Pedro Ramos-Cabrer and Alberto Cabrera-Zubizarreta, conducted MRI scans on the brains of ten marathon runners—eight men and two women—both before and after a 42-kilometer race. The scans depicted a marked decrease in myelin, a fatty layer that insulates nerve fibers and is integral for efficient communication between neurons. This reduction appeared uniquely pronounced in regions associated with motor function, coordination, sensory processing, and emotional integration. Remarkably, myelin levels began to rebound 24 to 48 hours post-race and were largely restored within two months for the six participants who continued with periodic scans.