title: The effect of exhaustive exercise on salivary immunoglobulin A.
abstract: The purpose of this study was to examine salivary immunoglobulin A (s-IgA) responses to exhaustive exercise. Twenty-nine, college age (means +/- SD = 21.45 +/- 3.1 yrs; range 18-29 yrs) moderately active males (running < 10 miles per week) performed an incremental treadmill test to exhaustion. Unstimulated salivary samples, collected before as well as immediately and one hour following the test, were analyzed for s-IgA using an enzyme-linked immunosorbent assay (ELISA). Mean s-IgA levels decreased significantly (24.4%, p < 0.05) immediately following the maximal test, and remained depressed (16.9%) one hour after the test. Of the 29 subjects, five exhibited an increase (range = 1.3 to 53.3%) in s-IgA following the exercise bout. The results of this study suggest that exhaustive exercise may temporarily reduce salivary IgA levels.
authors.affiliation: Center for Youth Fitness and Sports Research, University of Nebraska-Lincoln, Lincoln.
authors.forename: S L
authors.initials: SL
authors.lastname: McDowell
authors.forename: R A
authors.initials: RA
authors.lastname: Hughes
authors.forename: R J
authors.initials: RJ
authors.lastname: Hughes
authors.forename: D J
authors.initials: DJ
authors.lastname: Housh
authors.forename: T J
authors.initials: TJ
authors.lastname: Housh
authors.forename: G O
authors.initials: GO
authors.lastname: Johnson
mesh_terms: D000293:Adolescent; D000328:Adult; D004797:Enzyme-Linked Immunosorbent Assay; D015444:Exercise; D005080:Exercise Test; D006801:Humans; D007070:Immunoglobulin A / Q000737:chemistry*; D008297:Male; D012463:Saliva / Q000737:chemistry*; D013048:Specimen Handling
chemical_list: D007070:Immunoglobulin A