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Circadian variation of salivary immunoglobin A, alpha-amylase activity and mood in response to repeated double-poling sprints in hypoxia
Integrative and Experimental Exercise Science, Institute for Sport Sciences, University of Wuerzburg, Wuerzburg, Germany .
Swiss Federal Institute of Sport, Section for Elite Sport, Magglingen, Switzerland .
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. (NVC)
Clinical Biopsychology, University of Marburg, Marburg, Germany.
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2016 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 116, no 1, 1-10 p.Article in journal (Refereed) Published
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Abstract [en]

Purpose: To assess the circadian variations in salivary immunoglobin A (sIgA) and alpha-amylase activity (sAA), biomarkers of mucosal immune function, together with mood during 2 weeks of repeated sprint training in hypoxia (RSH) and normoxia (RSN). Methods: Over a 2-week period, 17 competitive cross-country skiers performed six training sessions, each consisting of four sets of five 10-s bouts of all-out double-poling under either normobaric hypoxia (FiO2: 13.8 %, 3000 m) or normoxia. The levels of sIgA and sAA activity and mood were determined five times during each of the first (T1) and sixth (T6) days of training, as well as during days preceding (baseline) and after the training intervention (follow-up). Results: With RSH, sIgA was higher on T6 than T1 (P = 0.049), and sAA was increased on days T1, T6, and during the follow-up (P < 0.01). With RSN, sIgA remained unchanged and sAA was elevated on day T1 only (P = 0.04). Similarly, the RSH group demonstrated reduced mood on days T1, T6, and during the follow-up, while mood was lowered only on T1 with RSN (P < 0.01). Conclusions: The circadian variation of sIgA and sAA activity, biomarkers of mucosal immune function, as well as mood were similar on the first day of training when repeated double-poling sprints were performed with or without hypoxia. Only with RSH did the levels of sIgA and sAA activity rise with time, becoming maximal after six training sessions, when mood was still lowered. Therefore, six sessions of RSH reduced mood, but did not impair mucosal immune function. © 2015, Springer-Verlag Berlin Heidelberg.

Place, publisher, year, edition, pages
2016. Vol. 116, no 1, 1-10 p.
Keyword [en]
Circadian rhythm, Diurnal profile, Mood state, Psycho-immunological stress-response, XC skiing
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-26908DOI: 10.1007/s00421-015-3236-3ISI: 000367610200001Scopus ID: 2-s2.0-84952980085OAI: oai:DiVA.org:miun-26908DiVA: diva2:897329
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CODEN: EJAPF

Available from: 2016-01-25 Created: 2016-01-25 Last updated: 2016-06-07Bibliographically approved

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Willis, Sara J.Holmberg, Hans-Christer
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