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Published in: European Journal of Applied Physiology 3/2022

Open Access 01-03-2022 | Original Article

Aortic haemodynamics: the effects of habitual endurance exercise, age and muscle sympathetic vasomotor outflow in healthy men

Authors: Denis J. Wakeham, Tony G. Dawkins, Rachel N. Lord, Jack S. Talbot, Freya M. Lodge, Bryony A. Curry, Lydia L. Simpson, Christopher J. A. Pugh, Robert E. Shave, Jonathan P. Moore

Published in: European Journal of Applied Physiology | Issue 3/2022

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Abstract

Purpose

We determined the effect of habitual endurance exercise and age on aortic pulse wave velocity (aPWV), augmentation pressure (AP) and systolic blood pressure (aSBP), with statistical adjustments of aPWV and AP for heart rate and aortic mean arterial pressure, when appropriate. Furthermore, we assessed whether muscle sympathetic nerve activity (MSNA) correlates with AP in young and middle-aged men.

Methods

Aortic PWV, AP, aortic blood pressure (applanation tonometry; SphygmoCor) and MSNA (peroneal microneurography) were recorded in 46 normotensive men who were either young or middle-aged and endurance-trained runners or recreationally active nonrunners (10 nonrunners and 13 runners within each age-group). Between-group differences and relationships between variables were assessed via ANOVA/ANCOVA and Pearson product-moment correlation coefficients, respectively.

Results

Adjusted aPWV and adjusted AP were similar between runners and nonrunners in both age groups (all, P > 0.05), but higher with age (all, P < 0.001), with a greater effect size for the age-related difference in AP in runners (Hedges’ g, 3.6 vs 2.6). aSBP was lower in young (P = 0.009; g = 2.6), but not middle-aged (P = 0.341; g = 1.1), runners compared to nonrunners. MSNA burst frequency did not correlate with AP in either age group (young: r = 0.00, P = 0.994; middle-aged: r = − 0.11, P = 0.604).

Conclusion

There is an age-dependent effect of habitual exercise on aortic haemodynamics, with lower aSBP in young runners compared to nonrunners only. Statistical adjustment of aPWV and AP markedly influenced the outcomes of this study, highlighting the importance of performing these analyses. Further, peripheral sympathetic vasomotor outflow and AP were not correlated in young or middle-aged normotensive men.
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Metadata
Title
Aortic haemodynamics: the effects of habitual endurance exercise, age and muscle sympathetic vasomotor outflow in healthy men
Authors
Denis J. Wakeham
Tony G. Dawkins
Rachel N. Lord
Jack S. Talbot
Freya M. Lodge
Bryony A. Curry
Lydia L. Simpson
Christopher J. A. Pugh
Robert E. Shave
Jonathan P. Moore
Publication date
01-03-2022
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Applied Physiology / Issue 3/2022
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI
https://doi.org/10.1007/s00421-021-04883-2

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