When is the sun best in winter?
There are two suitable time periods for sunbathing during the day. First, from 6: 00 am to 10, infrared rays prevail and ultraviolet rays are low, which makes people feel warm and soft; The second time period is from 4 pm to 5 pm, when alpha light in ultraviolet rays is dominant, which can promote the absorption of calcium and phosphorus in the intestine, enhance physical fitness and promote normal calcification of bones.
Healthy people should insist on sunbathing for 30 to 60 minutes every day. No matter what season, avoid being exposed to the sun for a long time between 10 and 4 pm, especially between 12 and 4 pm, because ultraviolet rays in the sun will do harm to the skin at this time.
Which part of the sun is the best?
The best places to bask in the sun are toes, thighs and knees, as well as navel, chest, back and head. Proper sunbathing can increase calcium in the body and promote the synthesis of vitamin D. Do more exercise in your life to increase your resistance. Each exercise needs more than 30 minutes, such as doing some aerobic exercise or functional exercise. When sunbathing, you must be moderate, and don't sunbathe for too long at a time, so as not to cause skin pigmentation.
How long is the sun suitable?
It is generally recommended to bask in the sun for one hour in winter. In summer, ultraviolet rays are too strong, which is easy to burn the skin. Generally, half an hour is enough. Ultraviolet rays in the sun can promote the conversion of 7- dehydrocholesterol in the skin into vitamin D, help the human body absorb and absorb nutrients such as calcium and phosphorus, and play a role in strengthening bones. Drink plenty of water to replenish water after exposure. You can also add some vitamin C to avoid direct sunlight. In addition, don't expose yourself to the glass, because ultraviolet rays can't penetrate the glass, which has no effect on basking in the sun and promoting calcium supplementation.
What are the precautions for sunbathing in winter?
1, it is best to choose loose and soft cotton-padded jacket in winter. To prevent weaker ultraviolet rays from reaching the skin through clothes in winter.
You can wear a hat with a brim to protect your eyes when you are in the sun.
Don't take a bath before or after the sun. Bathing will wash away 7- dehydrocholesterol (a substance that synthesizes active vitamin D in the skin) and reduce the role of sunlight in promoting calcium absorption.
4. Do not eat photosensitive food (mustard, lettuce, snail, shrimp, crab, mussel, etc.). ) before sun exposure, so as not to cause photosensitive drug eruption or solar dermatitis.
Remember to add clothes when you go back to the cold room in case you catch a cold.
6. Hydrate immediately after exposure, wash your face and apply lotion to avoid skin problems due to excessive dryness.
7. It's best to bask in the sun for about half an hour, or cool down under the tree when the sun is fierce to prevent sunburn.