title: Sleep Disordered Breathing During Live High-Train Low in Normobaric Versus Hypobaric Hypoxia.
abstract: Saugy, Jonas J., Laurent Schmitt, Sibylle Fallet, Raphael Faiss, Jean-Marc Vesin, Mattia Bertschi, Raphaël Heinzer, and Grégoire P. Millet. Sleep disordered breathing during live high-train low in normobaric versus hypobaric hypoxia. High Alt Med Biol. 17:233-238, 2016.-The present study aimed to compare sleep disordered breathing during live high-train low (LHTL) altitude camp using normobaric hypoxia (NH) and hypobaric hypoxia (HH). Sixteen highly trained triathletes completed two 18-day LHTL camps in a crossover designed study. They trained at 1100-1200 m while they slept either in NH at a simulated altitude of 2250 m or in HH. Breathing frequency and oxygen saturation (SpO2) were recorded continuously during all nights and oxygen desaturation index (ODI 3%) calculated. Breathing frequency was lower for NH than HH during the camps (14.6 ± 3.1 breath × min-1vs. 17.2 ± 3.4 breath × min-1, p < 0.001). SpO2was lower for HH than NH (90.8 ± 0.3 vs. 91.9 ± 0.2, p < 0.001) and ODI 3% was higher for HH than NH (15.1 ± 3.5 vs. 9.9 ± 1.6, p < 0.001). Sleep in moderate HH is more altered than in NH during a LHTL camp.
authors.affiliation: 1 Faculty of Biology and Medicine, ISSUL, Institute of Sport Sciences, University of Lausanne , Switzerland .|2 Department of Physiology, Faculty of Biology and Medicine, University of Lausanne , Switzerland .
authors.forename: Jonas J
authors.initials: JJ
authors.lastname: Saugy
authors.affiliation: 3 National School of Mountain Sports/National Ski-Nordic Centre , Prémanon, France .
authors.forename: Laurent
authors.initials: L
authors.lastname: Schmitt
authors.affiliation: 4 Institute of Electrical Engineering, Swiss Federal Institute of Technology , Lausanne, Switzerland .
authors.forename: Sibylle
authors.initials: S
authors.lastname: Fallet
authors.affiliation: 1 Faculty of Biology and Medicine, ISSUL, Institute of Sport Sciences, University of Lausanne , Switzerland .
authors.forename: Raphael
authors.initials: R
authors.lastname: Faiss
authors.affiliation: 4 Institute of Electrical Engineering, Swiss Federal Institute of Technology , Lausanne, Switzerland .
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Vesin
authors.affiliation: 5 Swiss Center for Electronics and Microtechnology , CSEM, Neuchâtel, Switzerland .
authors.forename: Mattia
authors.initials: M
authors.lastname: Bertschi
authors.affiliation: 6 Center for Investigation and Research in Sleep , CHUV, Lausanne, Switzerland .
authors.forename: Raphaël
authors.initials: R
authors.lastname: Heinzer
authors.affiliation: 1 Faculty of Biology and Medicine, ISSUL, Institute of Sport Sciences, University of Lausanne , Switzerland .|2 Department of Physiology, Faculty of Biology and Medicine, University of Lausanne , Switzerland .
authors.forename: Grégoire P
authors.initials: GP
authors.lastname: Millet
keywords: exercise; hypobaric hypoxia; normobaric hypoxia; sleep quality