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

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posted on 18.01.2022, 11:49 by Denis Wakeham, Tony G. Dawkins, Rachel LordRachel Lord, Jack Talbot, Freya M. Lodge, Bryony Curry, Lydia L. Simpson, Christopher J. A. Pugh, Rob Shave, Jonathan P. Moore

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.

History

Published in

European Journal of Applied Physiology

Publisher

Springer

Acceptance Date

28/12/2021

Publication Date

16/01/2022

Version

VoR (Version of Record)

Citation

Wakeham, D.J., Dawkins, T.G., Lord, R.N. et al. (2022) 'Aortic haemodynamics: the effects of habitual endurance exercise, age and muscle sympathetic vasomotor outflow in healthy men', European Journal of Applied Physiology. https://doi.org/10.1007/s00421-021-04883-2

Print ISSN

1439-6319

Electronic ISSN

1439-6327

Cardiff Met Affiliation

  • Cardiff School of Sport and Health Sciences

Cardiff Met Authors

Rachel Lord Bryony Curry Christopher J. A. Pugh Rob Shave

Cardiff Met Research Centre/Group

  • Cardiovascular Physiology

Copyright Holder

© The Authors

Language

en