Lactate Threshold and Psychomotor Fatigue Threshold in Hot Conditions: Suggestions for Soccer Players Participating in the Qatar World Cup 2022

Marek Konefał, Jan Chmura, Małgorzata Charmas, Jadwiga Kotowska, Krzysztof Błażejczyk and Paweł Chmura ()
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Marek Konefał: Department of Human Motor Skills, Wrocław University of Health and Sport Sciences, I.J. Paderewskiego 35, 51-612 Wrocław, Poland
Jan Chmura: Department of Human Motor Skills, Wrocław University of Health and Sport Sciences, I.J. Paderewskiego 35, 51-612 Wrocław, Poland
Małgorzata Charmas: Department of Physiology and Biochemistry, Faulty of Physical Eucation and Health in Biala Podlaska, Józef Piłsudski University of Physical Education in Warszawa, Akademicka 2, 21-500 Biała Podlaska, Poland
Jadwiga Kotowska: Department of Physiology and Biochemistry, Faulty of Physical Eucation and Health in Biala Podlaska, Józef Piłsudski University of Physical Education in Warszawa, Akademicka 2, 21-500 Biała Podlaska, Poland
Krzysztof Błażejczyk: Institute of Geography and Spatial Organization, Polish Academy of Sciences, Twarda 51/55, 00-818 Waszawa, Poland
Paweł Chmura: Department of Team Games, Wrocław University of Health and Sport Sciences, I.J. Paderewskiego 35, 51-612 Wrocław, Poland

IJERPH, 2022, vol. 19, issue 24, 1-8

Abstract: The study aimed at finding relationships between lactate threshold and psychomotor fatigue threshold during incremental exercise in thermo-neutral climate conditions and conditions for the 2022 FIFA World Cup in Qatar simulated in an environmental test chamber. The study included 24 soccer players aged 21.02 ± 3.22 years old. The following procedures were performed: The incremental exercise test to mark lactate concentration—LA (mmol·l −1 ); Psychomotor test to determine choice reaction time; Designation of the lactate threshold (T LA ) and psychomotor fatigue threshold (T PF ). Climate conditions: The procedure was performed twice in the climatic chamber: (1) in thermo-neutral conditions—TNC (ambient temperature 20.5 °C and relative air humidity 58.7%), (2) after 7 days—in Qatar conditions—QC (28.5 ± 1.92 °C) and (58.7 ± 8.64%). It was confirmed that the T PF , which reflects the highest efficiency of CNS functioning, occurs at a higher running speed than the T LA . The temperature of 28.5 °C with 58.7% humidity, which is the lower limit of heat stress, causes the psychomotor fatigue threshold to appear at a lower running speed than in thermoneutral conditions. The data recorded in this work may help to understand the specificity of physiological and psychomotor reactions to various climatic conditions.

Keywords: heat stress; soccer; choice reaction time (CRT); lactate concentration; incremental test (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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