A new study published in the journal Circulation shows exercise could help keep the cells in your body young.
The research, which studied 104 people, shows vigorous exercise may be creating an anti-aging effect that goes all the way down to a person's DNA.
Dr. Ulrich Laufs is the lead author of the study and researcher at Germany's University of Saarlandes.
"People who exercise have better health and live longer, however the mechanisms are not completely understood," Laufs told ABC News. "You'd be amazed at how little we know about the mechanism of exercise on the cellular level."
According to the study, cells from athletes are biologically younger than those of people who are inactive.
ABC News reports the key difference is something called telomeres. They are the protective caps on the end of DNA strands.
As a person ages, the caps get shorter leaving DNA vulnerable to damage.
However, research shows regular exercise helps maintain the caps as we age.