Can exercise make the brain more fit? That absorbing question inspired a new study at the University of South Carolina during which scientists assembled mice and assigned half to run for an hour a day on little treadmills, while the rest lounged in their cages without exercising.
Earlier studies have shown that exercise sparks
neurogenesis, or the creation of entirely new brain cells. But the South
Carolina scientists were not looking for new cells. They were looking
inside existing ones to see if exercise was whipping those cells into
shape, similar to the way that exercise strengthens muscle.
centuries, people have known that exercise remodels muscles, rendering
them more durable and fatigue-resistant. In part, that process involves
an increase in the number of muscle mitochondria, the tiny organelles
that float around a cell’s nucleus and act as biological powerhouses,
helping to create the energy that fuels almost all cellular activity.
The greater the mitochondrial density in a cell, the greater its
Source - New York Times