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头暖常言道:“冬天戴棉帽,胜过穿棉袄”。帽子虽小,却与人体的热平衡有着较密切的关系。实验证明:静止状态下不戴帽子的人,在环境温度为1℃时,从头部散失的热量,占人体总产热的三分之一,-4℃时为二分之一,-15℃时可高达四分之三。因此,在寒冷的冬天,人们为了减少体热的散失,戴一顶帽子是非常有益的。否则,头部暴露会导致受寒冷刺激,血管收缩,肌肉紧张,引起头痛、伤风感冒,甚至会造成胃肠不适、失
As the saying goes: “Winter wearing cotton hat, better than wearing a cotton jacket ”. Hat is small, but with the body’s heat balance has a closer relationship. Experiments show that: at rest, people do not wear a hat, at the ambient temperature of 1 ℃, the heat dissipated from the head, accounting for one third of the total body heat, -4 ℃ when the one-half, -15 ℃ up to three quarters. Therefore, in the cold winter, people in order to reduce the loss of body heat, wearing a hat is very useful. Otherwise, head exposure will lead to cold stimulation, vasoconstriction, muscle tension, causing headache, colds, and even cause gastrointestinal discomfort, loss