Intensified training augments cardiac function, but not blood volume, in male youth elite ice hockey team players

verfasst von: Mads Fischer, Jan S. Jeppesen, Jeppe F. Vigh-Larsen, Eric J. Stöhr, Magni Mohr, Kate A. Wickham, Lasse Gliemann, Jens Bangsbo, Ylva Hellsten, Morten Hostrup
Abstract: While it is well-established that a period of interval training performed at near maximal effort, such as speed endurance training (SET), enhances intense exercise performance in well-trained individuals, less is known about its effect on cardiac morphology and function as well as blood volume. To investigate this, we subjected 12 Under-20 Danish national team ice hockey players (age 18 ± 1 years, mean ± SD) to 4 weeks of SET, consisting of 6–10 × 20 s skating bouts at maximal effort interspersed by 2 min of recovery conducted three times weekly. This was followed by 4 weeks of regular training (follow-up). We assessed resting cardiac function and dimensions using transthoracic echocardiography and quantified total blood volume with the carbon monoxide rebreathing technique at three time points: before SET, after SET and after the follow-up period. After SET, stroke volume had increased by 10 (2–18) mL (mean (95% CI)), left atrial end-diastolic volume by 10 (3–17) mL, and circumferential strain improved by 0.9%-points (1.7–0.1) (all P < 0.05). At follow-up, circumferential strain and left atrial end-diastolic volume were reverted to baseline levels, while stroke volume remained elevated. Blood volume and morphological parameters for the left ventricle, including mass and end-diastolic volume, did not change during the study. In conclusion, our findings demonstrate that a brief period of SET elicits beneficial central cardiac adaptations in elite ice hockey players independent of changes in blood volume.
Organisationseinheit(en): Institut für Sportwissenschaft
Externe Organisation(en): Københavns Universitet
Aarhus University
Columbia University Irving Medical Center
Columbia University
University of Southern Denmark
University of the Faroe Islands
Typ: Artikel
Journal: Experimental physiology
ISSN: 0958-0670
Publikationsdatum: 16.07.2024
Publikationsstatus: Elektronisch veröffentlicht (E-Pub)
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Physiologie, Ernährung und Diätetik, Physiologie (medizinische)
Elektronische Version(en): https://doi.org/10.1113/EP091674 (Zugang: Offen)

BibTeX

@article{0aade2dcede9440dac4da3c0d81315b9,
title = "Intensified training augments cardiac function, but not blood volume, in male youth elite ice hockey team players",
abstract = "While it is well-established that a period of interval training performed at near maximal effort, such as speed endurance training (SET), enhances intense exercise performance in well-trained individuals, less is known about its effect on cardiac morphology and function as well as blood volume. To investigate this, we subjected 12 Under-20 Danish national team ice hockey players (age 18 ± 1 years, mean ± SD) to 4 weeks of SET, consisting of 6–10 × 20 s skating bouts at maximal effort interspersed by 2 min of recovery conducted three times weekly. This was followed by 4 weeks of regular training (follow-up). We assessed resting cardiac function and dimensions using transthoracic echocardiography and quantified total blood volume with the carbon monoxide rebreathing technique at three time points: before SET, after SET and after the follow-up period. After SET, stroke volume had increased by 10 (2–18) mL (mean (95% CI)), left atrial end-diastolic volume by 10 (3–17) mL, and circumferential strain improved by 0.9%-points (1.7–0.1) (all P < 0.05). At follow-up, circumferential strain and left atrial end-diastolic volume were reverted to baseline levels, while stroke volume remained elevated. Blood volume and morphological parameters for the left ventricle, including mass and end-diastolic volume, did not change during the study. In conclusion, our findings demonstrate that a brief period of SET elicits beneficial central cardiac adaptations in elite ice hockey players independent of changes in blood volume.",
keywords = "blood volume, echocardiography, high-intensity interval training, performance",
author = "Mads Fischer and Jeppesen, {Jan S.} and Vigh-Larsen, {Jeppe F.} and St{\"o}hr, {Eric J.} and Magni Mohr and Wickham, {Kate A.} and Lasse Gliemann and Jens Bangsbo and Ylva Hellsten and Morten Hostrup",
note = "Publisher Copyright: {\textcopyright} 2024 The Author(s). Experimental Physiology published by John Wiley & Sons Ltd on behalf of The Physiological Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.",
year = "2024",
month = jul,
day = "16",
doi = "10.1113/EP091674",
language = "English",
journal = "Experimental physiology",
issn = "0958-0670",
publisher = "Wiley-Blackwell Publishing Ltd",
}