The effect of varying intensities of lower limb eccentric muscle contractions on left ventricular function
| Autor: | Kyle O'Sullivan, Nicholas Sculthorpe, Joanna C. Richards, Luke A. Howlett |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Male
Mean arterial pressure medicine.medical_specialty Physiology Rest Hemodynamics Eccentric exercise Longitudinal strain Cardiovascular Ventricular Function Left Wall stress Physiology (medical) Internal medicine Heart rate medicine Eccentric Humans Orthopedics and Sports Medicine Muscle Skeletal Exercise Leg Ventricular function business.industry Public Health Environmental and Occupational Health General Medicine Left ventricle Blood pressure Rate pressure product Echocardiography Cardiology Original Article business Muscle Contraction |
| Zdroj: | European Journal of Applied Physiology |
| ISSN: | 1439-6327 1439-6319 |
| Popis: | 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 P 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. |
| Databáze: | OpenAIRE |
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