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The effect of exercise on large artery hemodynamics in healthy young men

journal contribution
posted on 2023-05-17, 01:38 authored by James SharmanJames Sharman, McEniery, CM, Campbell, RI, Coombes, JS, Wilkinson, IB, Cockcroft, JR
Background: Brachial blood pressure predicts cardiovascular outcome at rest and during exercise. However, because of pulse pressure amplification, there is a marked difference between brachial pressure and central (aortic) pressure. Although central pressure is likely to have greater clinical importance, very little data exist regarding the central haemodynamic response to exercise. The aim of the present study was to determine the central and peripheral haemodynamic response to incremental aerobic exercise. Materials and methods: Twelve healthy men aged 31 ± 1 years (mean ± SEM) exercised at 50%, 60%, 70% and 80% of their maximal heart rate (HRmax) on a bicycle ergometer. Central blood pressure and estimated aortic pulse wave velocity, assessed by timing of the reflected wave (TR), were obtained noninvasively using pulse wave analysis. Pulse pressure amplification was defined as the ratio of peripheral to central pulse pressure and, to assess the influence of wave reflection on amplification, the ratio of peripheral pulse pressure to nonaugmented central pulse pressure (PPP: CDBP-P1) was also calculated. Results: During exercise, there was a significant, intensity-related, increase in mean arterial pressure and heart rate (P < 0.001). There was also a significant increase in pulse pressure amplification and in PPP: CDBP-P1 (P < 0.001), but both were independent of exercise intensity. Estimated aortic pulse wave velocity increased during exercise (P < 0.001), indicating increased aortic stiffness. There was also a positive association between aortic pulse wave velocity and mean arterial pressure (r = 0.54; P < 0.001). Conclusions: Exercise significantly increases pulse pressure amplification and estimated aortic stiffness.

History

Publication title

European Journal of Clinical Investigation

Volume

35

Issue

12

Pagination

738-744

ISSN

0014-2972

Department/School

Menzies Institute for Medical Research

Publisher

Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Repository Status

  • Restricted

Socio-economic Objectives

Clinical health not elsewhere classified

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