Heated environment offsets the cardiovascular responses to prolonged rowing exercise in competitive athletes.

Autor: Barreto IVPDS; Laboratory of Experimental and Applied Exercise Physiology, Department of Physiology and Pharmacology, Federal Fluminense University, Brazil., Rodrigues GD; Laboratory of Experimental and Applied Exercise Physiology, Department of Physiology and Pharmacology, Federal Fluminense University, Brazil; Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy., Oliveira JS; Laboratory of Experimental and Applied Exercise Physiology, Department of Physiology and Pharmacology, Federal Fluminense University, Brazil., Neves EB; Graduate Program in Biomedical Engineering, Federal Technological University of Paraná, Curitiba, Brazil., Soares PPDS; Laboratory of Experimental and Applied Exercise Physiology, Department of Physiology and Pharmacology, Federal Fluminense University, Brazil. Electronic address: ppssoares@id.uff.br.
Jazyk: angličtina
Zdroj: Journal of thermal biology [J Therm Biol] 2023 Jul; Vol. 115, pp. 103603. Date of Electronic Publication: 2023 Jun 10.
DOI: 10.1016/j.jtherbio.2023.103603
Abstrakt: Prolonged rowing exercise sessions are often prescribed considering competitive training schedules, and under hostile environments (e.g., heated ambient). The study aimed to investigate the effect of heat stress (HS) on physical performance, Lactate concentration ([Lac]), and cardiorespiratory responses during prolonged exercise sessions in competitive rowers. Twelve rowers performed preliminary exercise tests (2-km test and five-step incremental lactate test) to assess the target workload intensity corresponding to a 2.5 mmol . L -1 of [Lac]. On two separate days, participants were enrolled in two exercise sessions of 12 km in a rowing machine under HS (∼30 °C) and thermal comfort (TC 22 °C) conditions. Heart rate (HR), stroke volume (SV), cardiac output (CO), oxygen uptake (VO 2 ), [Lac], and the rating of perceptual exertion (RPE) were obtained. From baseline, HS increased the maximum temperature of the face compared to TC. Workload and VO 2 reduced while RPE increased at 9- and 12-km of rowing exercise under HS compared to TC. From baseline to the last stage of exercise, HS shifted SV downwards and HR upwards compared to TC. Consequently, CO did not change between thermal conditions (TC vs. HS). Therefore, HS provokes a cardiovascular drift during prolonged rowing in comparison to TC. The last stages of prolonged rowing sessions under HS seem to be critical to physical performance and relative perceptual of effort in rowers.
Competing Interests: Declaration of competing interest There are no conflicts of interest.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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