1. Radiation: Radiation heat through electromagnetic waves from the warmth of the objects to the transfer of cold objects, we lost all the body heat, 65 percent is in this way. Radiation heat loss is the most exposed areas of skin, especially the blood supply of large parts of the body, as well as head and neck. To reduce the radiation heat loss is the best way to cover up the body.

2. Convection: the human body constantly on the surface of the surrounding layer of air moisture or heat. If the gas layer over the cold air after being upset by such a gust of wind swept through the human body through convection heat will be lost. Wind-proof clothing and camping with the fool in this way will greatly reduce heat loss.

3. Conduction: The heat is the heat conduction through direct contact from one object to another object. To reduce loss of heat conduction, it is necessary to use a thermal conductivity of poor physical objects will be cold and isolated from the surface.

4. Evaporation: water needs energy to make liquid into a gas. When we sweat, the clothes or the moisture evaporation, the liquid will draw the human body heat in order to complete the conversion to gas.

5. Respiratory: When we inhale cold air, we make it wet on their heating. When we breath, we emit heat. In extremely cold environment of dry air, the heat loss will speed up the process because of wet gas consume more calories. Attention should be paid should not be allowed to use up the body heat. In the fight for shelter created by a country with a warm air environment. Here, a heated tent has been very useful.

6. Metabolic: When we digest food to generate heat, we also consume energy, although the process itself would not cause the loss of heat, but if the energy loss has not been added, we will be exhausted and can not be produced in vivo Heat to sustain life. Depletion of physical fitness in outdoor activities, the main reason leading to hypothermia.