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01-02-2017 | Original Article

Aerobic fitness impacts sympathoadrenal axis responses to concurrent challenges

Authors: Heather E. Webb, Deena A. Rosalky, Matthew J. McAllister, Edmund O. Acevedo, Gary H. Kamimori

Published in: European Journal of Applied Physiology | Issue 2/2017

Abstract

The combination of mental and physical challenges can elicit exacerbated cardiorespiratory (CR) and catecholamine responses above that of a single challenge alone.

Purpose

This study examined the effects of a combination of acute mental challenges and physical stress on cardiorespiratory and catecholamine responses.

Method

Eight below-average fitness (LF VO_2max = 36.58 ± 3.36 ml⁻¹ kg⁻¹ min⁻¹) and eight above-average fitness (HF VO_2max = 51.18 ± 2.09 ml⁻¹ kg⁻¹ min⁻¹) participants completed an exercise-alone condition (EAC) session consisting of moderate-intensity cycling at 60% VO_2max for 37 min, and a dual-challenge condition (DCC) that included concurrent participation in mental challenges while cycling.

Result

The DCC resulted in increases in perceived workload, CR, epinephrine, and norepinephrine responses overall. HF participants had greater absolute CR and catecholamine responses compared to LF participants and quicker HR recovery after the dual challenge.

Conclusion

These findings demonstrate that cardiorespiratory fitness does impact the effect of concurrent stressors on CR and catecholamine responses.

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Title: Aerobic fitness impacts sympathoadrenal axis responses to concurrent challenges
Authors: Heather E. Webb
Deena A. Rosalky
Matthew J. McAllister
Edmund O. Acevedo
Gary H. Kamimori
Publication date: 01-02-2017
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Applied Physiology / Issue 2/2017
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-016-3519-3

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Aerobic fitness impacts sympathoadrenal axis responses to concurrent challenges

Abstract

Purpose

Method

Result

Conclusion

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Method

Result

Conclusion

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