The Effects of Repeated Thermal Stress on the Physiological Parameters of Young Physically Active Men Who Regularly Use the Sauna: A Multifactorial Assessment

Robert Podstawski, Krzysztof Borysławski, Andrzej Pomianowski, Wioletta Krystkiewicz, Tomasz Boraczyński, Dariusz Mosler, Jacek Wąsik and Jarosław Jaszczur-Nowicki
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Robert Podstawski: Department of Tourism, Faculty of Geoengineering, Recreation and Ecology, University of Warmia and Mazury in Olsztyn, ul. Oczapowskiego 5, 10-719 Olsztyn, Poland
Krzysztof Borysławski: Institute of Health, Angelus Silesius State University, ul. Zamkowa 4, 58-300 Wałbrzych, Poland
Andrzej Pomianowski: Department of Internal Diseases with Clinic, University of Warmia and Mazury in Olsztyn, ul. Oczapowskiego 2, 10-719 Olsztyn, Poland
Wioletta Krystkiewicz: Department of Internal Diseases with Clinic, University of Warmia and Mazury in Olsztyn, ul. Oczapowskiego 2, 10-719 Olsztyn, Poland
Tomasz Boraczyński: Department of Health Sciences, Olsztyn University, ul. Bydgoska 33, 10-041 Olsztyn, Poland
Dariusz Mosler: Department of Kinesiology and Health Prevention, Jan Dlugosz University in Częstochowa, 42-200 Częstochowa, Poland
Jacek Wąsik: Department of Kinesiology and Health Prevention, Jan Dlugosz University in Częstochowa, 42-200 Częstochowa, Poland
Jarosław Jaszczur-Nowicki: Department of Tourism, Faculty of Geoengineering, Recreation and Ecology, University of Warmia and Mazury in Olsztyn, ul. Oczapowskiego 5, 10-719 Olsztyn, Poland

IJERPH, 2021, vol. 18, issue 21, 1-11

Abstract: The aim of this study was to determine the effects of thermal stress (TS) on changes in blood biochemical parameters and fluid electrolyte levels in young adult men with moderate and high levels of physical activity. Thirty men (22.67 ± 2.02 years) were exposed to four 12-min sauna sessions (temperature: 90–91 °C; relative humidity: 14–16%) with four 6-min cool-down breaks. The evaluated variables were anthropometric, physiological, and hematological characteristics. The mean values of HR avg (102.5 bpm) were within the easy effort range, whereas HR peak (143.3 bpm) values were within the very difficult effort range. A significant increase was noted in pO2 ( p < 0.001), total cholesterol ( p < 0.008), HDL ( p < 0.006) and LDL cholesterol ( p < 0.007). Significant decreases were observed in the SBP (by 9.7 mmHg), DBP (by 6.9 mmHg) ( p < 0.001), pH ( p < 0.001), aHCO 3 - ( p < 0.005), sHCO3- ( p < 0.003), BE (ecf) ( p < 0.022), BE (B), ctCO 2 (for both p < 0.005), glucose ( p < 0.001), and LA ( p < 0.036). High 72-min TS did not induce significant changes in the physiological parameters of young and physically active men who regularly use the sauna, excluding significant loss of body mass. We can assume that relatively long sauna sessions do not disturb homeostasis and are safe for the health of properly prepared males.

Keywords: Finnish sauna; morphological parameters; biochemical characteristics; fluids; electrolyte levels (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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