Exercise heat acclimation has minimal effects on left ventricular volumes, function and systemic hemodynamics in euhydrated and dehydrated trained humans

Author:

Travers Gavin123ORCID,González-Alonso José23ORCID,Riding Nathan1,Nichols David4,Shaw Anthony1,Périard Julien D.15ORCID

Affiliation:

1. Athlete Health and Performance Research Centre, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar

2. Centre for Human Performance, Exercise and Rehabilitation, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge, United Kingdom

3. Division of Sport, Health and Exercise Sciences, Department of Life Sciences, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge, United Kingdom

4. Sport Development Centre, Loughborough University, Loughborough, United Kingdom

5. University of Canberra Research Institute for Sport and Exercise, University of Canberra, Bruce, Australia

Abstract

This study demonstrates that 10 days of exercise heat acclimation has minimal effects on left ventricular volumes, intrinsic cardiac function, and systemic hemodynamics during prolonged, repeated semirecumbent exercise in moderate heat, where heart rate and blood volume are similar to preacclimation levels. However, progressive dehydration is consistently associated with similar degrees of hyperthermia and tachycardia and reductions in blood volume, diastolic filling of the left ventricle, stroke volume, and cardiac output, regardless of acclimation state.

Funder

Aspetar Orthopaedic and Sports Medicine Hospital

Publisher

American Physiological Society

Subject

Physiology (medical),Cardiology and Cardiovascular Medicine,Physiology

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