Stay within your comfort zone by keeping your exercise heart rate to between 70 to 80 percent of your maximum capacity and strengthen it with short, anaerobic bursts. (It’s okay to feel a little breathless, but you should be able to talk without gasping for air.)
Alternate your gaze between the far horizon, middle range, and close range – changing your focus works the eye muscles and keeps them healthy, plus it ensures that your eyes are really open to the beauty that surrounds you. When hiking downhill on slippery mud or shale rock, tuck in your tailbone to keep your spine straight, and take smaller, lighter steps. Try using hiking poles for extra security.
Proper hydration is essential. A good rule is to drink about a liter every two hours – the higher the altitude, the more you need. Pay attention to what your body tells you : higher altitudes can cause headache, fatigue, shortness of breath, dizziness, or nausea. These symptoms usually disappear after you adjust to the lower oxygen levels. The key is good hydration and deep breathing.