The infrared rays in sunlight can penetrate the skin and reach the subcutaneous tissue, promoting blood vessel dilation, accelerating blood circulation and promoting metabolism.
Ultraviolet rays in sunbathing are the main source of vitamin D produced by human body, which is more effective than taking vitamin D from food, and is beneficial to calcium absorption and prevention and treatment of osteoporosis. Vitamin D, alias "sunshine vitamin", helps to relieve people's depression, prevent lymphoma, prostate cancer, colon cancer, lung cancer, breast cancer and ovarian cancer, and help to delay aging.
The best places for sunbathing are rivers and lakes, beaches and wild forests with fresh air, quiet environment, cleanliness and sunshine, and can also be carried out in your own courtyard and balcony.
The best time for sunbathing is before 9 am and after 3 pm, and strong sunlight at noon in summer should be avoided. It can be done in a sunny place or a windless room at noon in winter, but don't sunbathe through the glass, because ultraviolet rays can't penetrate the glass and can't achieve the effect of sunbathing. Sunbathing lasts about 1 hour each time, and you can rest in the shade.
Sunbathing can expose the periphery of the body in sections, preferably the whole body, to increase the contact area between the skin and the sun; You can lie on your back and lie prone.
Chinese medicine believes that "the back is yang", and it is best to bask in the back to supplement the yang. Sunlight can activate a large number of immune cells hidden under the skin of the back, thus promoting the smoothness of the Du meridian and bladder meridian, the smoothness of qi and blood, the harmony of viscera, and the elimination of diseases and pain.
Be careful not to expose your head to the sun to avoid dizziness and headache. You can wear a straw hat or cover your head with a towel. Close your eyes or wear sunglasses to avoid light. If you find excessive sweating, pale face, headache, loss of appetite, skin allergies, etc. You should stop exercising in time, analyze the reasons and treat the symptoms.
In sunbathing, you should replenish water in time, preferably boiled water.
After sunbathing, you should wipe your sweat, take a bath and change your underwear in time to avoid catching cold.
Reasonable and moderate sun exposure is good, on the contrary it is harmful. Avoid exposure to the sun, so as not to burn the skin, which is easy to cause skin pain. People with severe anemia, tuberculosis, intestinal dysfunction, infectious diseases and fever are not suitable for sunbathing.