Elsayed, M Intellectual differences of adult men related to age and physical fitness before and after an exercise program. [electronic resource] - Journal of gerontology May 1980 - 383-7 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0022-1422 Standard No.: 10.1093/geronj/35.3.383 doi Subjects--Topical Terms: AdultAgedAgingCognition--physiologyHumansIntelligenceIntelligence TestsMaleMiddle AgedPhysical ExertionPhysical Fitness