Physiological stress imposed by the hot environment during a HIIT session

  • Wanessa Aparecida Lopes da Silva Laboratório de Performance Humana, Departamento de Educação Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil.
  • William Martins Januário Laboratório de Performance Humana, Departamento de Educação Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil.
  • Leonardo Mateus Teixeira Rezende Laboratório de Biologia do Exercício, Departamento de Educação Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil.
  • Luciano Bernardes Leite Laboratório de Biologia do Exercício, Departamento de Educação Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil.
  • João Carlos Bouzas Marins Laboratório de Performance Humana, Departamento de Educação Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil.
  • Thales Nicolau Prímola Gomes Laboratório de Performance Humana, Departamento de Educação Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil.
Keywords: High-intensity interval training, Heat-shock response, Exercise, Health

Abstract

Introduction: Constant increases in environmental temperature have a direct impact on daily activities, such as, for example, physical exercise. Objective: To evaluate the physiological stress imposed by the hot environment compared to the temperate environment during a HIIT session. Materials and Methods: 10 male amateur cyclists (35.5 ±7.4 years, 60.4 ±4.3 mL.kg-1.min-1), made 4 visits to the laboratory. 1st visit: sample characterization; 2nd visit: familiarization of the sample with the protocol; 3rd/4th visits: the volunteers were randomly evaluated in two conditions, Control (Tenvironment: 22.9 ±0.9ºC; RH: 70.1 ±9.9%) and Hot (Tenvironment: 32.2 ±0. 5ºC; RH: 63.9 ±4.5%). HIIT session: After a 5min/15W warm-up, a HIIT protocol was started with 4 identical blocks of 1min at 90% Pmax and 3min recovery at 50% Pmax. Internal (Tgastrointestinal), body (Tbody) and skin (Tskin) temperatures, heart rate (HR), subjective perception of exertion (RPE), thermal comfort (CT), thermal sensation (ST) and the physiological stress index (IEF). Data were analyzed using Two-Way ANOVA, Bonferroni post hoc, Student's t test and Pearson's correlation. Mean ± SD (α=5%). Ethics: 852796618.1.0000.5153. Results: In relation to the control environment, higher values of Tgastrointestinal, Tbody, Tskin, HR, PSE, CT, ST, IEF and a positive correlation between physiological and perceptual variables were observed. Conclusion: The physiological stress imposed by the hot environment was greater during a HIIT session.

Author Biography

William Martins Januário, Laboratório de Performance Humana, Departamento de Educação Física, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brasil.

Bacharel em educação física e mestrando do programa de Pós graduação em Educação Física UFV/UFJF onde é orientado pelo Prof. Dr Thales Nicolau Prímola Gomes. Pesquisador e membro do Grupo de Estudos em Termorregulação e Exercício Físico GETEF.

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Published
2024-03-17
How to Cite
Silva, W. A. L. da, Januário, W. M., Rezende, L. M. T., Leite, L. B., Marins, J. C. B., & Gomes, T. N. P. (2024). Physiological stress imposed by the hot environment during a HIIT session. Brazilian Journal of Exercise Prescription and Physiology, 18(114), 198-209. Retrieved from https://www.rbpfex.com.br/index.php/rbpfex/article/view/2863
Issue
Vol. 18 No. 114 (2024)
Section
Scientific Articles - Original

Copyright (c) 2024 Wanessa Aparecida Lopes da Silva, William Martins Januário, Leonardo Mateus Teixeira Rezende, Luciano Bernardes Leite, João Carlos Bouzas Marins, Thales Nicolau Prímola Gomes

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