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Frequency Domain Measures of Heart Rate Variability At Sea Level Predict Oxygen Desaturation During Normobaric Hypoxia
Shonk, Ryan
Shonk, Ryan
Abstract
Previous studies demonstrate that individuals with greater resting hypoxemia at moderate to high altitudes are at greater risk for developing acute mountain sickness (AMS). PURPOSE: The purpose of this study was to determine if short-term (5 min) measures of heart rate variability (HRV) could predict oxygen saturation during acute exposure to normobaric hypoxia equivalent to an altitude of 4572 meters. METHODS: 59 young (20.67±0.99 years), healthy subjects (31 female, 28 male) participated in the study. HRV was measured using the FirstBeat BodyGuard 3 and analyzed using the Kubios software 5 min prior to acute hypoxia exposure. Subjects rested in a reclined position for 10 min, breathing room air (~sea level), then normobaric, hypoxic air equivalent to 4572 m (11.8% oxygen) for 10 min, followed by a return to room air for an additional 10 min. Heart rate, HRV, minute ventilation (VE), and percent oxygen saturation (SpO2%) were measured continuously. RESULTS: Significant (p
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2024-12-01
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Kinesiology & Health Sciences