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春暖花开之时,很多人都会出现提不起精神,疲乏、嗜睡、频繁打呵欠,这就是人们常说的“春困”。这是因为在春季,平均气温逐渐升高,万物复苏,人体的阳气也随之开始生发,人体细胞增强了活力,新陈代谢日趋旺盛,体表毛孔舒展,血管变软,末梢毛细血管的供血量增加,而流入大脑微血管的血液就相应减少,使中枢神经系统的兴奋性刺激减弱,甚至出现抑制状况,于是人体就会有昏昏欲睡的
Spring blossoms, many people will be able to mention can not afford to be mentally tired, drowsiness, frequent yawns, which is often said Spring Break . This is because in the spring, the average temperature gradually increased, the recovery of all things, the body’s yang will also begin to germinate, human cells enhance the vitality, metabolism is exuberant, the body surface pores stretch, vascular soft, peripheral capillary blood supply The amount of blood flow into the cerebral capillaries decreased accordingly, so that the excitement of the central nervous system stimulation weakened, or even inhibit the situation, so the body will have drowsiness