{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T14:52:35Z","timestamp":1788274355789,"version":"build-2803163510"},"reference-count":44,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2025,8,11]],"date-time":"2025-08-11T00:00:00Z","timestamp":1754870400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["European Journal of Sport Science"],"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Ultra\u2010endurance sports challenge athlete health, with these risks exacerbated by environmental extremes and\/or remoteness of competition. Therefore, this study aimed to use real\u2010time monitoring technology to characterise and monitor physiological\/biomechanical responses during SAMLA 2023, a 200\u2010km multidiscipline (swim, run, bike, and kayak) ultra\u2010endurance race, encompassing cool and warm desert environmental conditions (16\u00b0C\u201328\u00b0C). Within a cross\u2010sectional observational study design, 18 males (total entrants: 318) were instrumented with wearable\/ingestible sensors measuring physiological [heart rate and core (Tc)\/skin (Tsk) temperature], biomechanical [gait] and location\u2010based [Global Positioning System (GPS)] metrics. Sensors connected to a smartphone application via Bluetooth, which saved and transmitted data to a cloud\u2010based dashboard in real\u2010time. Participants were on\u2010course for an accumulated \u223c668 h. \u223c662 h of GPS data were displayed in real\u2010time with the longest individual data capture of \u223c57 h. Physiological\/biomechanical data were acquired for x\u0304: \u223c42% (range: \u223c38%\u2013\u223c49%) of the participant on\u2010course time. Hypo\/hyperthermic Tc's were seen (x\u0304: 37.8\u00b0C range: 35.7\u00b0C\u201339.2\u00b0C). Tsk (28\u00b0C: 11.7\u00b0C\u201338.4\u00b0C) in response to the varied in\u2010race environmental challenges (16\u00b0C\u201328\u00b0C ambient temperature) and heart rate (111 b\u00b7min<jats:sup>\u22121<\/jats:sup>: 37 b\u00b7min<jats:sup>\u22121<\/jats:sup>\u2013179 b\u00b7min<jats:sup>\u22121<\/jats:sup>) varied markedly. One participant was hospitalised without presentation in physiological data. Biomechanical data had significant data loss and quality issues and are not presented. Developments in real\u2010time monitoring technology, acknowledging limitations observed here (physiological\/biomechanical data acquisition), may allow combined in\u2010race GPS and physiological data (e.g., Tc\/Tsk) to be used during ultra\u2010endurance sport to prospectively protect athlete health. GPS\/physiological data alone may not identify medical emergencies, and medical teams must remain alert to medical events.<\/jats:p>","DOI":"10.1002\/ejsc.70026","type":"journal-article","created":{"date-parts":[[2025,8,11]],"date-time":"2025-08-11T14:38:54Z","timestamp":1754923134000},"source":"Crossref","is-referenced-by-count":6,"title":["Real\u2010Time Monitoring of Biometric Responses During a 200\u2010km Ultra\u2010Endurance Race Across the Desert"],"prefix":"10.1002","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7239-6396","authenticated-orcid":false,"given":"Chris J.","family":"Esh","sequence":"first","affiliation":[{"name":"Aspetar Orthopaedic and Sports Medicine Hospital  Doha Qatar"},{"name":"School of Sport, Exercise and Health Sciences National Centre for Sport and Exercise Medicine (NCSEM) Loughborough University  Loughborough 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