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MedLine Citation:
PMID:  23249819     Owner:  NLM     Status:  Publisher    
ABSTRACT: The aim of this study was to determine the effects of high-intensity endurance exercise on skin immunity by estimating secretory immunoglobulin A (SIgA) and staphylococci on skin surface. Seven healthy adult males (age; 22.3 ± 2.0 years) performed bicycle exercise at 75%HRmax for 60 min from 20:30 to 21:30. SIgA was obtained from 1 mL extraction liquids stirred with the microtube homogenizer in the open end of a polypropylene tube for 60 s. SIgA concentrations were measured using enzyme-linked immunosorbent assay (ELISA). Staphylococci were harvested by pressed agar-based media against skin surface. Skin surface samples were collected from the chest and the forearm on the first day at 20:30 (before rest; A1), 21:30 (after rest; A2), 22:30 (after showering; A3), the next morning at 7:00 (A4), and on the second day at 20:30 (before exercise; B1), 21:30 (after exercise; B2), 22:30 (after showering; B3), and the next morning at 7:00 (B4). SIgA concentration on the forearm was significantly lower at B2 (p < 0.05) and B3 (p < 0.05) than that at B1, and that on the chest at B1 tended to be higher compared with B2 (p = 0.084) and B3 (p = 0.075). The number of staphylococci was significantly higher at B2 than that at B1 (p < 0.01) and B4 (p < 0.01) on the forearm. We conclude that high-intensity endurance exercise might depress immune function and enhance infectious risk on skin surface. Coaches should encourage their athletes to take a shower and change into clean clothes immediately after sports activities and athletes should maintain a clean skin surface to decrease the infectious risk on skin surface.
Nobuhiko Eda; Kazuhiro Shimizu; Satomi Suzuki; Yoko Tanabe; Eunjae Lee; Takao Akama
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-17
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1Graduate School of Sport Sciences, Waseda University, JAPAN 2Sports Research & Development Core, University of Tsukuba, JAPAN 3Faculty of Sport Sciences, Waseda University, Saitama, JAPAN.
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