Do not tolerate horseplay in dangerous settings. Conditioning and Acclimatization Many health hazards of wilderness travel, such as falls, can be avoided by a reasonable degree of strength and endurance which can only be acquired by conditioning. Every expedition member should begin from a state of maximum fitness. Other health hazards, such as temperature extremes and high-altitude disorders, can in certain circumstances be avoided by acclimatization to the environment. Acclimatization is a physiological adaptation that is often different from, and may be unrelated to, physical fitness.
Equipment Be prepared for foul-weather conditions.
Always assume that you will be forced to spend an unexpected night outdoors. Carry warm clothing and waterproof rain gear. Break in all footwear, and take care to pad rough edges and exposed seams. All expedition leaders should carry safety and first-aid supplies for the most likely mishaps. Medical supplies must be arranged so that they can be rapidly located and deployed.