Howlett, LA orcid.org/0000-0002-7786-5569, O’Sullivan, K, Sculthorpe, N et al. (1 more author) (2020) The effect of varying intensities of lower limb eccentric muscle contractions on left ventricular function. European Journal of Applied Physiology, 120 (2). pp. 539-548. ISSN 1439-6319
Abstract
Purpose
The effect of eccentric (ECC) resistance exercise (RE) on myocardial mechanics is currently unknown.
Method
This study investigated ECC RE at varying intensities on left ventricular (LV) function using LV strain (ε), wall stress and haemodynamic parameters. Twenty-four healthy male volunteers completed ECC leg extensions at 20%, 50% and 80% of their ECC maximal voluntary contraction (MVC), whilst receiving echocardiograms. Global longitudinal ɛ, strain rate (SR), longitudinal tissue velocity, heart rate (HR), blood pressure (BP), mean arterial pressure (MAP), LV wall stress and rate pressure product (RPP) were assessed at baseline and during exercise.
Results
Left ventricular global ɛ, systolic SR and wall stress remained unchanged throughout. Systolic blood pressure (sBP), MAP and RPP increased at 80% and 50% intensities compared to rest (P < 0.01). Eccentric RE increased HR and peak late diastolic SR at all intensities compared to rest (P < 0.02).
Conclusion
The findings suggest acute ECC RE may not alter main parameters of LV function, supporting future potential for wider clinical use. However, future studies must investigate the impact of multiple repetitions and training on LV function.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
Keywords: | Eccentric exercise; Left ventricle; Cardiovascular; Wall stress; Longitudinal strain |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Jan 2022 15:08 |
Last Modified: | 18 Jan 2022 15:08 |
Status: | Published |
Publisher: | Springer |
Identification Number: | 10.1007/s00421-019-04298-0 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:182637 |