title: An assessment of the influence of habitual physical activity, prior sport participation, smoking habits, and aging upon indices of cardiovascular fitness: preliminary report of a cross-sectional and retrospective study.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D002319:Cardiovascular System / Q000503:physiopathology*; D003430:Cross-Sectional Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D010809:Physical Fitness; D012189:Retrospective Studies; D012907:Smoking / Q000503:physiopathology*; D013177:Sports; D014481:United States