Climbing high-altitude mountain peaks without oxygen cylinders is extremely dangerous, but the following methods can **partially reduce the risk** (**It is strongly recommended to refer only in emergency situations, and give priority to abandoning the summit or withdrawing**)： --- ### **1. Fully adapt to high altitude environment** -**Slow ascent**: Follow the principle of “climbing high and sleeping low” (the daily altitude rise does not exceed 300-500 meters, and the sleeping point is lower than the highest point of the climb). -**Extend the adaptation time**: Stay at a medium altitude (such as 4000 meters) for a few days to allow the body to produce more red blood cells to adapt to hypoxia. -**Observe body signals**: Headache, nausea, and fatigue are signs of acute mountain sickness (AMS) and need to be withdrawn immediately. --- ### **2. Reduce oxygen demand** -**Extremely slow action**: Reduce the speed to 1/3 of the usual time and reduce oxygen consumption (for example: breathe 2-3 times per step). -**Avoid weight-bearing**: Streamline equipment to survival necessities (warm clothing, food, water). -**Maintain body temperature**: Cold will increase oxygen consumption. Wear windproof and waterproof clothing to avoid temperature loss. --- ### **3. Temporary emergency skills** -**Forced exhalation method** (only used in emergency)： After a quick and deep breath, exhale vigorously with your mouth (similar to blowing a candle), which can temporarily increase blood oxygen saturation (the effect is limited). -**Energy supplementation**: High-sugar foods (such as chocolate and glucose) provide instant energy and reduce muscle oxygen consumption. -**Avoid dehydration**: Drink 3-4 liters of water daily to prevent blood from thickening and worsening hypoxia. --- ### **4. Risk management (key! ）** -**Set the absolute altitude upper limit**: For example, after 5000 meters, the oxygen-free cylinder must be withdrawn. - * *Group together**: At least 2 people in a group to monitor each other for altitude sickness (such as blurred consciousness and ataxia). -**Backup plan**: Bring portable oxygen (such as ”oxygen bar" for emergency) or contact rescue. --- ###**️️Important Warning** -**Do not try the “death zone” above 8,000 meters**: The mortality rate of oxygen-free climbing of Everest-level peaks is extremely high (even if professional climbers rely on years of training and excellent physique). -**Alternative plan**: Choose a technical mountain peak with a lower altitude (such as 6962 meters in Aconcagua, South America, which can be completed without oxygen for some people after adaptation). If you need to challenge the limits, you must pass several months of plateau training (such as simulated hypoxia tents), medical assessment (check heart and lung function), and form a professional support team. The safety of life is always higher than the honor of reaching the top.