People who start mountain climbing for the first time may find that they need to turn back before they reach their goals at first. Mountaineering is a physically demanding activity that requires a high level of physical and mental stamina. Not everyone can summit a mountain on their first climbing trip. This is completely normal. Even if you battle at first, persevering and climbing more often will improve your stamina and allow you to climb more easily, and for longer periods of time. Every time you climb, you will build stamina. In time, this will allow you to summit mountains and perform other demanding activities with relative ease.