Coronary Artery Disease (CAD) Clinical Trial
Official title:
Effects of Hypoxia Pre-conditioning on Physiological Responses During Mountain Sport Activities in Persons With a History of Coronary Artery Disease
Mountain sport activities as for example hiking or skiing may involve the risk of adverse health events especially in older people not accustomed to the specific mountain sport at altitude or people with pre-existing health issues. Increased activation of the sympathetic nervous system and abrupt changes in heart rate and blood pressure are thought to trigger these adverse effects. Preventive measures include regular physical activity (i.e. training) and adequate medical treatment. Hypoxia pre-adaptation (e.g., pre-adapt one night at moderate altitude) and pre-conditioning (e.g., intermittent hypoxia (IH) training), which was shown to lead to some favorable sympathetic nervous system, ventilatory and metabolic adaptations and additionally exerts anti-inflammatory action, could be hypothesized of being a further preventive measure. The aim of this research project is to investigate whether intermittent hypoxia pre-conditioning or sleeping one night at altitude (i.e., current recommendation before practicing mountain leisure sports in the elderly) is able to increase oxygen saturation during passive hypoxia exposure and during simulated hiking and skiing at altitude. Additionally, it is aimed to investigate whether such procedure reduces the physiological responses (i.e., heart rate, its variability and blood pressure (including baroreflex sensitivity) responses as well as metabolic, ventilatory, inflammatory and redox responses) during these activities.
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