Skip to main content

Research Repository

Advanced Search

Diurnal Variation in Physiological and Immune Responses to Endurance Sport in Highly Trained Runners in a Hot and Humid Environment

Boukelia, Z.; Gomes, E. C.; Florida-James, G. D.

Authors

Z. Boukelia

E. C. Gomes



Abstract

Purpose. The purpose of this study was to investigate the physiological and immunological response of highly trained runners to an intense bout of exercise performed at two different times of day, in a hot, humid environment. Methods. Using a crossover randomized design, 13 highly trained runners (range VO 2 max 64–79 ml·kg −1 min −1) performed a 10 km time trial run in hot (28 ° C) and humid conditions (70%), at 2 different times of day (09:00 hs and 18:00 hs). Venous blood samples were taken to determine WBCs (white blood cells), IL-6 (interleukin-6), CC16 (club cell protein 16), and HSP70 (heat shock protein-70) concentrations. Upper respiratory tract inflammation was additionally assessed using a nasal lavage procedure. Results. A significant diurnal difference (p < 0 05) was found for core body temperature, total WBC, and neutrophil and lymphocyte concentrations with higher values at 18:00 hs. A phase response in IL-6, HSP70, WBC, neutrophil, lymphocyte, and CC16 was noted, being more pronounced at 18:00 hs, whilst core body temperature and HR phase responses were more pronounced at 09:00 hs. Conclusion. In hot and humid conditions, athletes may wish to consider, when possible, racing and particularly training in the morning where the least homeostatic perturbation occurs.

Journal Article Type Article
Acceptance Date Apr 10, 2018
Online Publication Date May 9, 2018
Publication Date 2018
Deposit Date May 9, 2018
Publicly Available Date May 9, 2018
Journal Oxidative Medicine and Cellular Longevity
Print ISSN 1942-0900
Electronic ISSN 1942-0994
Publisher Hindawi
Peer Reviewed Peer Reviewed
Volume 2018
Article Number 3402143
DOI https://doi.org/10.1155/2018/3402143
Keywords Immunological response; exercise; physiological response;
Public URL http://researchrepository.napier.ac.uk/Output/1178617
Contract Date May 9, 2018

Files

Diurnal Variation in Physiological and Immune Responses to Endurance Sport in Highly Trained Runners in a Hot and Humid Environment (1.8 Mb)
PDF

Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Copyright © 2018 B. Boukelia et al. This is an open access article distributed under the Creative Commons Attribution License,
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.







You might also like



Downloadable Citations