eprintid: 10169137 rev_number: 9 eprint_status: archive userid: 699 dir: disk0/10/16/91/37 datestamp: 2023-05-03 12:41:33 lastmod: 2023-05-03 12:41:33 status_changed: 2023-05-03 12:41:33 type: article metadata_visibility: show sword_depositor: 699 creators_name: Racinais, Sebastien creators_name: Havenith, George creators_name: Aylwin, Polly creators_name: Ihsan, Mohammed creators_name: Taylor, Lee creators_name: Adami, Paolo Emilio creators_name: Adamuz, Maria-Carmen creators_name: Alhammoud, Marine creators_name: Alonso, Juan Manuel creators_name: Bouscaren, Nicolas creators_name: Buitrago, Sebastian creators_name: Cardinale, Marco creators_name: van Dyk, Nicol creators_name: Esh, Chris J creators_name: Gomez-Ezeiza, Josu creators_name: Garrandes, Frederic creators_name: Holtzhausen, Louis creators_name: Labidi, Mariem creators_name: Lange, Gunter creators_name: Lloyd, Alexander creators_name: Moussay, Sebastien creators_name: Mtibaa, Khouloud creators_name: Townsend, Nathan creators_name: Wilson, Mathew G creators_name: Bermon, Stephane title: 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 ispublished: pub divisions: UCL divisions: B02 divisions: C10 divisions: D16 divisions: G88 keywords: Science & Technology, Life Sciences & Biomedicine, Sport Sciences, exercise, hot temperature, EXERCISE, STRATEGIES, SYMPTOMS, COHORT, SEX note: http://creativecommons.org/licenses/by-nc/4.0/ This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/. abstract: 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 (Tcore; ingestible pill) and skin (Tskin; 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 Tcore during competition reached 39.6°C±0.6°C (maximum 41.1°C). Tskin decreased from 32.2°C±1.3°C to 31.0°C±1.4°C during the races (p<0.001). Tcore was not related to DNF (25% of starters) or medical events (p≥0.150), whereas Tskin, Tskin rate of decrease and Tcore-to-Tskin 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 Tcore (39.4°C±0.4°C vs 39.8°C±0.7°C, p=0.044) and larger in-race decrease in Tskin (−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 Tskin, Tskin rate of decrease and Tcore-to-Tskin 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. date: 2022-02-13 date_type: published publisher: BMJ PUBLISHING GROUP official_url: http://dx.doi.org/10.1136/bjsports-2021-104569 oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1939915 doi: 10.1136/bjsports-2021-104569 medium: Print-Electronic pii: bjsports-2021-104569 lyricists_name: Cardinale, Marco lyricists_name: Wilson, Mathew lyricists_id: MCARD36 lyricists_id: MWILS01 actors_name: Cardinale, Marco actors_id: MCARD36 actors_role: owner funding_acknowledgements: [World Athletics] full_text_status: public publication: British Journal of Sports Medicine volume: 56 number: 8 pagerange: 439-445 pages: 8 event_location: England issn: 0306-3674 citation: Racinais, Sebastien; Havenith, George; Aylwin, Polly; Ihsan, Mohammed; Taylor, Lee; Adami, Paolo Emilio; Adamuz, Maria-Carmen; ... Bermon, Stephane; + view all <#> Racinais, Sebastien; Havenith, George; Aylwin, Polly; Ihsan, Mohammed; Taylor, Lee; Adami, Paolo Emilio; Adamuz, Maria-Carmen; Alhammoud, Marine; Alonso, Juan Manuel; Bouscaren, Nicolas; Buitrago, Sebastian; Cardinale, Marco; van Dyk, Nicol; Esh, Chris J; Gomez-Ezeiza, Josu; Garrandes, Frederic; Holtzhausen, Louis; Labidi, Mariem; Lange, Gunter; Lloyd, Alexander; Moussay, Sebastien; Mtibaa, Khouloud; Townsend, Nathan; Wilson, Mathew G; Bermon, Stephane; - view fewer <#> (2022) 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. British Journal of Sports Medicine , 56 (8) pp. 439-445. 10.1136/bjsports-2021-104569 <https://doi.org/10.1136/bjsports-2021-104569>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10169137/1/Association%20between%20thermal%20responses%2C%20medical%20events%2C%20performance%2C%20heat%20acclimation%20and%20health%20status%20in%20male%20and%20female%20el.pdf