title: The effect of exercise intensity and duration on salivary immunoglobulin A.
abstract: Two experiments were performed to examine salivary immunoglobulin A (s-IgA) responses to varying levels of exercise intensity and duration. For experiment 1, 9 college men (mean age, SD = 23.56, 1.64 years) completed treadmill runs of 15, 30, and 45 min at approximately 60% of maximum oxygen consumption (VO2max). For experiment 2, 9 other college men (mean age, SD = 23.67, 2.0 years) ran for 20 min at approximately 50, 65 and 80% of VO2max. Unstimulated salivary samples were collected before, and immediately, 1 and 2 h after the exercise. Samples were assayed for s-IgA using an enzyme-linked immunosorbent assay. Mean s-IgA levels did not change significantly (P greater than 0.05) at any of the post-exercise collection times when compared to pre-exercise levels. The results of this investigation indicated that running at intensities of 50-80% of VO2max and for durations of 15-45 min did not affect s-IgA levels.
authors.affiliation: Center for Youth Fitness and Sports Research, University of Nebraska-Lincoln.
authors.forename: S L
authors.initials: SL
authors.lastname: McDowell
authors.forename: K
authors.initials: K
authors.lastname: Chaloa
authors.forename: T J
authors.initials: TJ
authors.lastname: Housh
authors.forename: G D
authors.initials: GD
authors.lastname: Tharp
authors.forename: G O
authors.initials: GO
authors.lastname: Johnson
mesh_terms: D000328:Adult; D004797:Enzyme-Linked Immunosorbent Assay; D015444:Exercise / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007071:Immunoglobulin A, Secretory / Q000032:analysis*; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D012463:Saliva / Q000276:immunology*; D013997:Time Factors
chemical_list: D007071:Immunoglobulin A, Secretory