title: Sleep quality in older adults: effects of exercise training and influence of sunlight exposure.
authors.forename: P J
authors.initials: PJ
authors.lastname: O'Connor
authors.forename: S D
authors.initials: SD
authors.lastname: Youngstedt
mesh_terms: D000368:Aged; D002940:Circadian Rhythm; D015444:Exercise; D006801:Humans; D012890:Sleep; D013472:Sunlight