Acute Mountain Sickness Is Not Repeatable Across Two 12-Hour Normobaric Hypoxia Exposures
نویسندگان
چکیده
منابع مشابه
Exercise intensity typical of mountain climbing does not exacerbate acute mountain sickness in normobaric hypoxia.
Physical exertion is thought to exacerbate acute mountain sickness (AMS). In this prospective, randomized, crossover trial, we investigated whether moderate exercise worsens AMS in normobaric hypoxia (12% oxygen, equivalent to 4,500 m). Sixteen subjects were exposed to altitude twice: once with exercise [3 × 45 min within the first 4 h on a bicycle ergometer at 50% of their altitude-specific ma...
متن کاملAcute Mountain Sickness Symptoms Depend on Normobaric versus Hypobaric Hypoxia
Acute mountain sickness (AMS), characterized by headache, nausea, fatigue, and dizziness when unacclimatized individuals rapidly ascend to high altitude, is exacerbated by exercise and can be disabling. Although AMS is observed in both normobaric (NH) and hypobaric hypoxia (HH), recent evidence suggests that NH and HH produce different physiological responses. We evaluated whether AMS symptoms ...
متن کاملInfluence of Acute Normobaric Hypoxia on Hemostasis in Volunteers with and without Acute Mountain Sickness
INTRODUCTION The aim of the present study was to investigate whether a 12-hour exposure in a normobaric hypoxic chamber would induce changes in the hemostatic system and a procoagulant state in volunteers suffering from acute mountain sickness (AMS) and healthy controls. MATERIALS AND METHODS 37 healthy participants were passively exposed to 12.6% FiO2 (simulated altitude hypoxia of 4,500 m)....
متن کاملAcute mountain sickness: increased severity during simulated altitude compared with normobaric hypoxia.
Acute mountain sickness (AMS) strikes those in the mountains who go too high too fast. Although AMS has been long assumed to be due solely to the hypoxia of high altitude, recent evidence suggests that hypobaria may also make a significant contribution to the pathophysiology of AMS. We studied nine healthy men exposed to simulated altitude, normobaric hypoxia, and normoxic hypobaria in an envir...
متن کاملAcute mountain sickness, chemosensitivity, and cardiorespiratory responses in humans exposed to hypobaric and normobaric hypoxia.
We examined the control of breathing, cardiorespiratory effects, and the incidence of acute mountain sickness (AMS) in humans exposed to hypobaric hypoxia (HH) and normobaric hypoxia (NH), and under two control conditions [hypobaric normoxia (HN) and normobaric normoxia (NN)]. Exposures were 6 h in duration, and separated by 2 wk between hypoxic exposures and 1 wk between normoxic exposures. Be...
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ژورنال
عنوان ژورنال: Wilderness & Environmental Medicine
سال: 2014
ISSN: 1080-6032
DOI: 10.1016/j.wem.2013.11.007