Effects of normobaric hypoxic bed rest on the thermal comfort zone

Journal of Thermal Biology
Ursa CiuhaIgor B Mekjavic

Abstract

Future Lunar and Mars habitats will maintain a hypobaric hypoxic environment to minimise the risk of decompression sickness during the preparation for extra-vehicular activity. This study was part of a larger study investigating the separate and combined effects of inactivity associated with reduced gravity and hypoxia, on the cardiovascular, musculoskeletal, neurohumoural, and thermoregulatory systems. Eleven healthy normothermic young male subjects participated in three trials conducted on separate occasions: (1) Normobaric hypoxic ambulatory confinement, (2) Normobaric hypoxic bedrest and (3) Normobaric normoxic bedrest. Normobaric hypoxia was achieved by reduction of the oxygen fraction in the air (FiO2 = 0.141 ± 0.004) within the facility, while the effects of reduced gravity were simulated by confining the subjects to a horizontal position in bed, with all daily routines performed in this position for 21 days. The present study investigated the effect of the interventions on behavioural temperature regulation. The characteristics of the thermal comfort zone (TCZ) were assessed by a water-perfused suit, with the subjects instructed to regulate the sinusoidally varying temperature of the suit within a range considered as th...Continue Reading

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Aug 6, 2014·European Journal of Applied Physiology·Tadej DebevecIgor B Mekjavic

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Citations

Dec 28, 2016·European Journal of Applied Physiology·Shawnda A MorrisonIgor B Mekjavic
Apr 17, 2016·Physiology & Behavior·Ursa Ciuha, Igor B Mekjavic
Jun 28, 2016·American Journal of Physiology. Heart and Circulatory Physiology·Michail E KeramidasOla Eiken
Dec 25, 2015·Respirology : Official Journal of the Asian Pacific Society of Respirology·Shawnda A MorrisonLeja Dolenc-Groselj
Jun 27, 2019·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Michail E KeramidasOla Eiken
Mar 21, 2020·International Journal of Biometeorology·Urša CiuhaIgor B Mekjavic
Jul 15, 2020·Experimental Physiology·Angelique Van OmbergenThu Jennifer Ngo-Anh

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