ArticleOpen access journal of sports medicine2024
Short-Term Intermittent Normobaric Hypoxia Combined with Light Exercise Improves Acclimatization of Cardiorespiratory Function in Inactive Adults.
Article in Open access journal of sports medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Un-acclimatized individuals may experience acute altitude illness. Thus, the current study investigated the impact of short-term intermittent normobaric hypoxia (NH) combined with light exercise on the acclimatization of cardiorespiratory function to altitude in inactive adults. Methods: This quasi-experimental study recruited 10 inactive university students (age: 26.3 ± 2.53 years). All participants were instructed to perform light exercise while exposed to intermittent NH (15%) (2 h/d) for 2 weeks continuously. The heart rate (HR), relative oxygen consumption (VO2 mL/kg/min), minute ventilation (VE), VO2/HR, and respiratory frequency (RF) were measured. Results: Results illustrated a significant improvement in participants' cardiorespiratory functions by 10 days after exposure to NH, as compared to day 1 of exposure, based on their HR, RF, and VE responses at rest and HR, RF, VE, VO2, VO2/kg, and VO2/HR during light exercise. Resting-state values had returned to the pre-NH exposure levels after 10 days of intermittent NH exposure. Furthermore, values measured during light exercise were significantly decreased on days 10 and 14 as compared to day 1 of NH exposure. Conclusion: This study concluded that as few as 10 days of exposure to intermittent NH (pO2 = 15%) combined with light exercise may improve the acclimation to NH of 15% pO2 in inactive adults.
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