Is it cool and sunny?

Sunbathing in winter is a cost-free way to keep fit. Modern medicine has proved that sunbathing in winter can enhance the metabolism and immune function of various parts of the human body, which is particularly effective in preventing rickets in children or osteoporosis in adults. During the day, at 6: 00 am 6:00- 10/0 and at 4: 00 pm-5: 00 pm, there are many X-ray components in ultraviolet rays, which are beneficial to normal calcification of bones. However, in any season, from 10 in the morning to 4: 00 in the afternoon, due to the strong ultraviolet rays, it is forbidden to expose to the sun for a long time. It is best to bask in the sun for half an hour to an hour at a time in winter, and it is best to wear red clothes, followed by white clothes, not black clothes. It is easy to get sleepy in the sun in winter, and chatting can prevent falling asleep and catching a cold. Sunlight is indispensable for human survival, especially in winter. Medical research shows that there is a gland called pineal gland at the bottom of the human brain, which is very sensitive to sunlight. It is connected to the eyes through nerve fibers. When the sun is strong, the pineal gland is inhibited and its secretion is reduced; On the contrary, when the intensity of sunlight weakens, the pineal gland is excited and the hormone secretion increases. Hormones secreted by pineal gland can regulate the content of other hormones in human body. The more pineal hormone is secreted, the less adrenaline and thyroxine are secreted. Adrenaline and thyroxine are hormones that stimulate the work of human cells. When their content is relatively reduced, cells will be in a state of inhibition, and the whole human body function will be in a state of inhibition, resulting in depression, fatigue and listlessness. Getting more sunshine in winter has a good effect on sleep and depression. If you are afraid of tanning, apply sunscreen products suitable for winter. Don't give up precious winter sunshine for this ~