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春季正是大地回春、百花争艳的好季节,但有些人常感到疲倦无力,即使晚上有充足的睡眠,白天仍精神不振,昏昏欲睡。这就是人们所说的春困。春困不是病,它是人体生理机能随自然季节变化和气温高低转换而发生相应调节的一种短暂生理现象。冬天温度低,皮肤和血管收缩,神经系统容易兴奋,大脑就比较清醒。而春天,气温适中,皮肤和肌肉毛细管处于弛缓舒张的状态,血流缓慢,体表血液供应量增加,流入大脑的血液相应减少,大脑兴奋度降低,于是出现昏沉欲睡的春困现象。
Spring is a good season for earth rejuvenation and flowers blooming. However, some people often feel tired and weak. Even though they have enough sleep at night, they are still sluggish and sleepy during the day. This is what people call spring sleepy. Spring sleep is not a disease, it is the body’s physiological function with the natural seasonal changes and the temperature changes in the corresponding regulation of a transient physiological phenomenon. Winter low temperature, skin and blood vessels, the nervous system easily excited, the brain is more sober. In the spring, the temperature is moderate, the skin and muscle capillaries in the state of relaxation and relaxation, slow blood flow, increased body surface blood supply, a corresponding decrease in blood flow into the brain, brain excitability decreased, so sleepy sleepy phenomenon.