title: Immune function in athletes versus nonathletes.
abstract: The purpose of this study was to compare natural killer cell cytotoxic activity (NKCA) and Con A-induced lymphocyte proliferation (T cell function) in athletes versus nonathletes, with measurement of natural killer (NK) and T cells to allow a comparison on a "per-cell" adjusted basis. Eighteen young male endurance athletes (10 runners and 8 cyclists) with a mean VO2max of 70.7 +/- 1.3 ml.kg-1.min-1 and 6.6 +/- 0.8 years of competitive experience were compared with 11 nonathletic male adults (47.6 +/- 3.1 ml.kg-1.min-1). Concentrations of circulating leukocyte and lymphocyte subsets, including NK and T cells, were not significantly different between groups. NKCA and T cell function also did not differ between groups, whether expressed unadjusted or adjusted on a per-cell basis. For all subjects combined, both NKCA and T cell function were unrelated to VO2max (r = 0.005, p = 0.98; r = 0.007, p = 0.97, respectively). These data do not support the contention that immune function, as measured in this study, is altered in endurance athletes.
authors.affiliation: Department of Health, Leisure, and Exercise Science, Appalachian State University, Boone, North Carolina 28608, USA.
authors.forename: D C
authors.initials: DC
authors.lastname: Nieman
authors.forename: D
authors.initials: D
authors.lastname: Brendle
authors.forename: D A
authors.initials: DA
authors.lastname: Henson
authors.forename: J
authors.initials: J
authors.lastname: Suttles
authors.forename: V D
authors.initials: VD
authors.lastname: Cook
authors.forename: B J
authors.initials: BJ
authors.lastname: Warren
authors.forename: D E
authors.initials: DE
authors.lastname: Butterworth
authors.forename: O R
authors.initials: OR
authors.lastname: Fagoaga
authors.forename: S L
authors.initials: SL
authors.lastname: Nehlsen-Cannarella
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D003602:Cytotoxicity, Immunologic; D006801:Humans; D007694:Killer Cells, Natural / Q000502:physiology*; D008213:Lymphocyte Activation; D008297:Male; D013177:Sports / Q000502:physiology*