How Exercise Keeps Your DNA Young
To stay young, you have to keep your cells young, and what dictates a cell’s age is its DNA. Too many cycles of dividing can trigger the aging process, until eventually the cell peters out and stops dividing altogether.
But now researchers have found that exercise can help keep DNA healthy and young. In a small study published in the journal Science Advances, Anabelle Decottignies, from the de Duve Institute at the Catholic University of Louvain in Brussels, and her colleagues found that just moderate-intensity physical activity helps hold back cell aging.
They studied a specific part of DNA that keeps track of how many times a cell has divided. Each time a cell divides, it copies its DNA (which is packed into chromosomes) and this section of the chromosomes, called telomeres, gets shorter. In the study, Decottignies identified a molecule that’s responsible for directing this telomere-shortening. Until this work, not much was known about how the chromosomes controlled this DNA snipping process.
Autor / Fonte:http://time.com/