With rising altitude, the air pressure decreases and so does the ability of a body to absorb oxygen. However, once our body experiences conditions such as these, it immediately begins to adapt with the situation which can be seen by an increased heart beat in order to transport more oxygen to the blood. But this process may last for couple of days depending on the altitude you are riding. Altitude sickness can affect riders of all age groups, both men and women, smokers and non-smokers alike. Therefore, it is best to address the problem before it becomes worse. In short, mild symptoms of altitude sickness are quite common while touring in Ladakh. These symptoms fade away in a couple of days as you begin to acclimatize. So, during the first few days of your arrival, make sure you wear warm clothes and maintain a healthy diet. Staying hydrated enough with electrolyte and water will also help your body to absorb oxygen better. Butter tea, fresh juice, and warm soup will also help, but refrain from alcohol at least for first few days. Further Reading: How To Prevent Mountain Sickness On A Motorcycle Tour of Himalayas