Exercise Makes Our Muscles Work Better With Age - The New York Times

http://well.blogs.nytimes.com/2016/03/30/exercise-makes-our-muscles-work-better-with-age/?action=click&pgtype=Homepage&version=Moth-Visible&moduleDetail=inside-nyt-region-2&module=inside-nyt-region&region=inside-nyt-region&WT.nav=inside-nyt-region&_r=0