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Aerobic fitness impacts sympathoadrenal axis responses to concurrent challenges
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Journal Article
Aerobic fitness impacts sympathoadrenal axis responses to concurrent challenges
2017
Overview
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
V
O
2max
= 36.58 ± 3.36 ml
−1
kg
−1
min
−1
) and eight above-average fitness (HF
V
O
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%
V
O
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.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
