Association between thermal responses, medical events, performance, heat acclimation and health status in male and female elite athletes during the 2019 Doha World Athletics Championships.

Autor:	Racinais S; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar sebastien.racinais@aspetar.com., Havenith G; Environmental Ergonomics Research Centre, Loughborough University, Loughborough, Leics, UK., Aylwin P; Environmental Ergonomics Research Centre, Loughborough University, Loughborough, Leics, UK., Ihsan M; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar.; Human Potential Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore., Taylor L; School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.; Human Performance Research Centre, University of Technology Sydney, Sydney, New South Wales, Australia., Adami PE; Health and Science, World Athletics, Monaco.; LAMHESS, Université Côte d'Azur, Nice, France., Adamuz MC; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar., Alhammoud M; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar., Alonso JM; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar., Bouscaren N; Inserm CIC1410, CHU Reunion, La Réunion, Réunion.; Interuniversity Laboratory of Human Movement Biology-EA 7424, Université Jean Monnet Saint-Etienne, Saint-Etienne, France., Buitrago S; Olympic Training and Service Centre Lower Saxony, Hannover, Germany., Cardinale M; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar.; Institute of Sport Exercise and Health (ISEH), University College London, London, UK., van Dyk N; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar.; High Performance Unit, Irish Rugby Football Union, Dublin, Ireland., Esh CJ; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar.; School of Sport Exercise and Health Sciences, Loughborough, UK., Gomez-Ezeiza J; Institute of Sport and Exercise Medicine, Stellenbosch University Faculty of Medicine and Health Sciences, Cape Town, South Africa., Garrandes F; Health and Science, World Athletics, Monaco.; LAMHESS, Université Côte d'Azur, Nice, France., Holtzhausen L; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar.; Section Sports Medicine, University of Pretoria Faculty of Health Sciences, Pretoria, South Africa., Labidi M; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar., Lange G; Health and Science, World Athletics, Monaco., Lloyd A; Environmental Ergonomics Research Centre, Loughborough University, Loughborough, Leics, UK., Moussay S; Unicaen, Inserm, Comete, GIP Cyceron, Normandie Universite, Caen, France., Mtibaa K; Physical Education Department, College of Education, Qatar University, Doha, Qatar., Townsend N; College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar., Wilson MG; Aspetar, Orthopaedic and Sports Medicine Hospital, FIFA Medical Centre of Excellence, Doha, Qatar.; Institute of Sport Exercise and Health (ISEH), University College London, London, UK., Bermon S; Health and Science, World Athletics, Monaco.; LAMHESS, Université Côte d'Azur, Nice, France.
Jazyk:	angličtina
Zdroj:	British journal of sports medicine [Br J Sports Med] 2022 Apr; Vol. 56 (8), pp. 439-445. Date of Electronic Publication: 2022 Feb 14.
DOI:	10.1136/bjsports-2021-104569
Abstrakt:	Purpose: To determine associations between thermal responses, medical events, performance, heat acclimation and health status during a World Athletics Championships in hot-humid conditions. Methods: From 305 marathon and race-walk starters, 83 completed a preparticipation questionnaire on health and acclimation. Core (T core ; ingestible pill) and skin (T skin ; thermal camera) temperatures were measured in-competition in 56 and 107 athletes, respectively. 70 in-race medical events were analysed retrospectively. Performance (% personal best) and did not finish (DNF) were extracted from official results. Results: Peak T core during competition reached 39.6°C±0.6°C (maximum 41.1°C). T skin decreased from 32.2°C±1.3°C to 31.0°C±1.4°C during the races (p<0.001). T core was not related to DNF (25% of starters) or medical events (p≥0.150), whereas T skin , T skin rate of decrease and T core -to-T skin gradient were (p≤0.029). A third of the athletes reported symptoms in the 10 days preceding the event, mainly insomnia, diarrhoea and stomach pain, with diarrhoea (9% of athletes) increasing the risk of in-race medical events (71% vs 17%, p<0.001). Athletes (63%) who performed 5-30 days heat acclimation before the competition: ranked better (18±13 vs 28±13, p=0.009), displayed a lower peak T core (39.4°C±0.4°C vs 39.8°C±0.7°C, p=0.044) and larger in-race decrease in T skin (-1.4°C±1.0°C vs -0.9°C±1.2°C, p=0.060), than non-acclimated athletes. Although not significant, they also showed lower DNF (19% vs 30%, p=0.273) and medical events (19% vs 32%, p=0.179). Conclusion: T skin , T skin rate of decrease and T core -to-T skin gradient were important indicators of heat tolerance. While heat-acclimated athletes ranked better, recent diarrhoea represented a significant risk factor for DNF and in-race medical events. Competing Interests: Competing interests: None declared. (© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
Databáze:	MEDLINE
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