When ticking off the benefits of physical activity, few of us would include intracellular housecleaning. But a new study suggests that the ability of exercise to speed the removal of garbage from inside our body’s cells may be one of its most valuable, if least visible, effects.
In the new research, which was published last month in Nature, scientists at the University of Texas Southwestern Medical Center in Dallas gathered two groups of mice. One set was normal, with a finely tuned cellular scrubbing system. The other had been bred to have a blunted cleaning system.
It’s long been known that cells accumulate flotsam from the wear and tear of everyday living. Broken or misshapen proteins, shreds of cellular membranes, invasive viruses or bacteria, and worn-out, broken-down cellular components, like aged mitochondria, the tiny organelles within cells that produce energy, form a kind of trash heap inside the cell. Continue reading