Mountains and Human Health: Adaptation, Therapy, and Risks The impact of the mountain environment on human health is a complex and ambiguous phenomenon, at the intersection of physiology, ecology, and medicine. It is determined by two key factors: hypoxia (the decrease in partial pressure of oxygen with altitude) and a special complex of natural conditions (insolation, air purity, landscape). The effect can be both therapeutic and pathological, depending on altitude, exposure time, and individual characteristics of the body. Physiological Adaptation to Altitude: From Acute Stress to Acclimatization When ascending to altitude, the body faces a challenge: the oxygen content in the air decreases, although its percentage composition remains constant (~21%). The body's response goes through several stages: Acute reaction (first hours to a day): Increased breathing (hyperventilation) and heart rate to compensate for hypoxia. This may be accompanied by symptoms of acute mountain sickness (AMS): headache, nausea, insomnia, weakness. Acclimatization (days to weeks): Includes a complex of long-term adaptations: Increase in erythropoietin production by the kidneys → increase in the production of red blood cells (erythrocytes) and hemoglobin levels to improve oxygen tolerance (polycythemia). Increase in capillary density in tissues. Cellular changes: Increase in the number of mitochondria and enzymes involved in aerobic respiration. Increase in lung vital capacity. Interesting fact: Peoples who have lived in high-altitude regions for centuries (Tibetans, Quechua, Sherpas) have unique genetic adaptations. For example, Tibetans have a variant of the EPAS1 gene, which regulates the response to hypoxia, preventing excessive hemoglobin level growth and reducing the risk of complications related to increased blood viscosity. Potential Health Benefits: Climatotherapy and Hypoxy Training Moderate altitude (800–2500 meters above sea level) under the condition of proper acclimatization c ... Read more