Effect of acute ambient temperature exposure on cardio-pulmonary and respiratory kinetics in men

U Drescher; J Koschate; U Hoffmann; Stefan Schneider; A Werner

doi:10.1080/02656736.2017.1354402

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Effect of acute ambient temperature exposure on cardio-pulmonary and respiratory kinetics in men

Journal article

Peer reviewed

Effect of acute ambient temperature exposure on cardio-pulmonary and respiratory kinetics in men

U Drescher, J Koschate, U Hoffmann, Stefan Schneider and A Werner

International Journal of Hyperthermia, Vol.34(4), pp.442-454

2018

DOI: https://doi.org/10.1080/02656736.2017.1354402

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Abstract

ambient temperature

circulatory modelling

exercise

gas exchange

PRBS

thermoregulation

time-series analysis

Aim: The goal of the study was to compare the kinetic responses of heart rate (HR) and pulmonary (VÌ‡O2pulm) and muscular (VÌ‡O2musc) oxygen uptake during dynamic leg exercise across different acute ambient temperature conditions in a climatic chamber. Methods: Thirteen physically healthy, active, male volunteers demonstrated pseudorandom binary sequence (PRBS) work rate (WR) changes between 30 and 80 W at 15 °C, 25 °C and 35 °C, respectively. HR was measured beat-to-beat using an echocardiogram and VÌ‡O2pulm by breath-by-breath gas exchange; VÌ‡O2musc estimations were assessed by applying a circulatory model and cross-correlation functions. Results: No significant differences were observed across the various temperature conditions in each case for HR, VÌ‡O2pulm or VÌ‡O2musc kinetics (p > 0.05). Baroreflex regulation based on HR kinetics does not seem to be influenced between ambient temperatures of 15 °C and 35 °C during dynamic exercise. Conclusions: The results imply that ambient temperatures of 15 °C, 25 °C and 35 °C have no effect on HR, VÌ‡O2pulm or VÌ‡O2musc kinetics during dynamic moderate exercise. The applied approach may be of interest for assessments of the cardio-pulmonary and respiratory health statuses of individuals working or performing sports in extreme temperature environments. Furthermore, differentiation between systemic (e.g. cardio-dynamic: HR) and specific (e.g. exercising tissues: VÌ‡O2musc) determinants of the relevant physiological systems may improve the evaluation of an individual's health status. © 2017 Informa UK Limited, trading as Taylor & Francis Group

Details

Title: Effect of acute ambient temperature exposure on cardio-pulmonary and respiratory kinetics in men
Authors: U Drescher (Author) - German Sport University Cologne, Germany
J Koschate (Author) - German Sport University Cologne, Germany
U Hoffmann (Author) - German Sport University Cologne, Germany
Stefan Schneider (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
A Werner (Author) - Charite University Medicine, Germany
Publication details: International Journal of Hyperthermia, Vol.34(4), pp.442-454
Publisher: Taylor & Francis Ltd.
Date published: 2018
DOI: 10.1080/02656736.2017.1354402
ISSN: 0265-6736
Organisation Unit: University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy
Language: English
Record Identifier: 99450451102621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Oncology; Radiology, Nuclear Medicine & Medical Imaging