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Mucosal immune responses to treadmill exercise in elite wheelchair athletes.
MedLine Citation:
PMID:  21228725     Owner:  NLM     Status:  Publisher    
PURPOSE:: To examine salivary secretory immunoglobulin A (sIgA) responses and α-amylase activity following constant load and intermittent exercise in elite wheelchair athletes. METHODS:: Twenty-three wheelchair athletes divided into three groups (8 tetraplegic (TETRA), 7 paraplegic (PARA), and 8 non spinal cord injured (NON-SCI)) performed two randomised and counterbalanced 60 min sessions on a treadmill. These consisted of a constant load (60% peak oxygen uptake (V˙O2peak)) and an intermittent (80% and 40% V˙O2peak) exercise block. Timed, unstimulated saliva samples were obtained pre, mid, post, and 30 min post exercise and analysed for sIgA and α-amylase. Furthermore, oxygen uptake, blood lactate concentration and rating of perceived exertion (RPE) were measured during both sessions. RESULTS:: SIgA secretion rate and α-amylase activity were increased during exercise in all groups (p<0.05). However, the increase of sIgA secretion rate during exercise was greater in TETRA individuals (post exercise average data for both trials in comparison to pre: TETRA +60±31%, PARA +30±35%, NON-SCI +11±25%, p<0.05). Yet, groups were comparable with respect to blood lactate concentration and RPE for both exercise sessions. CONCLUSION:: Despite the disruption of autonomic salivary gland innervation in TETRA athletes, their ability to increase sIgA secretion rate seems comparable to wheelchair athletes with intact autonomic salivary gland innervation. The similar responses between groups may stem from sympathetic reflex activity during exercise or a predominant contribution of parasympathetic activity, which are still intact systems in the TETRA population. The results of this study support the positive role of acute exercise on oral immune function in wheelchair athletes independent of disability type.
Christof A Leicht; Nicolette C Bishop; Victoria L Goosey-Tolfrey
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-11
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-1-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1School of Sport, Exercise, and Health Sciences, Loughborough University, Loughborough; UK 2The Peter Harrison Centre for Disability Sport, Loughborough University, Loughborough; UK.
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