title: Physical Activity Is Key for Successful Aging-Reply: Even a Little Is Good.
authors.affiliation: Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland.
authors.forename: Hannah
authors.initials: H
authors.lastname: Arem
authors.affiliation: Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland.
authors.forename: Charles E
authors.initials: CE
authors.lastname: Matthews
authors.affiliation: Harvard Medical School, Boston, Massachusetts.
authors.forename: I-Min
authors.initials: IM
authors.lastname: Lee
mesh_terms: D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D009026:Mortality; D011998:Recreation