Case report of a world class ironman triathlete: EIAH at the ventilatory treshold

Olivier Galy 1, 2 Anis Chaouachi 3 Karim Chamari 4 Christian Prefaut 5, 6 Olivier Hue 1 Anis Chaouachi 3 Karim Chamari 4
1 ACTES - Adaptations au Climat Tropical, Exercice et Santé
2 IUFM de l'Université de la Nouvelle-Calédonie, 125 av James Cook, BPX4, 98852 Nouméa Cedex, Nouvelle-Calédonie, France
3 Tunisian Research Laboratory ''Sport Performance Optimisation'' - National Centre of Medicine & Science in Sport, Tunis, Tunisia
4 Athlete Health and Performance Research Centre
5 PhyMedExp - Physiologie & médecine expérimentale du Cœur et des Muscles [U 1046]
6 CHRU, Hôpital A de Villeneuve, Montpellier, France
Abstract : To study the exercise-induced arterial hypoxaemia (EIAH) kinetics in a world class Ironman triathlete at ventilatory threshold (TH vent), the authors simulated the cycle-run succession (CR, 20 min + 20 min) and a 20-min isolated run (R). Although 'moderate EIAH' was noted during CR, the SpO 2 kinetics of the isolated R reflected 'severe EIAH' from minutes 7 to 15 with a nadir of 85 % SpO 2 that stabilised at 90 % SpO 2 from minute 15 on. The physiological processes involved in these responses are discussed. These data indicate a systematic 'moderate EIAH' in a world class Ironman champion during CR and R at TH vent and a temporary 'severe EIAH' during R, which was attenuated when running was successive to cycling. The physiological significance of this phenomenon remains unclear, however, and further experiments are needed.
Keywords : pulse oximetry gas exchanges respiratory performance triathlon
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Journal articles
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https://hal.univ-antilles.fr/hal-01152346
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Submitted on : Saturday, May 16, 2015 - 12:27:48 AM
Last modification on : Wednesday, May 29, 2019 - 11:46:02 AM

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UNIV-AG | BS | UNIV-MONTPELLIER

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Olivier Galy, Anis Chaouachi, Karim Chamari, Christian Prefaut, Olivier Hue, et al.. Case report of a world class ironman triathlete: EIAH at the ventilatory treshold. International Sportmed Journal, International Federation of Sports Medicine, 2014, 15 (4), pp.315-320. ⟨hal-01152346⟩

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