RT Journal Article SR Electronic T1 Online-only: Exercise can play role in delaying senior memory loss, study says JF The Nation's Health JO Nations Health FD American Public Health Association SP E34 OP E34 VO 43 IS 7 A1 McGill, Natalie YR 2013 UL http://www.thenationshealth.org/content/43/7/E34.abstract AB