Scientists have recently discovered that lasers in dance halls are harmful to people's eyes. Scientists think that the laser in the ballroom is a kind of light pollution. When the dense laser beam passes through the lens of the eye and focuses on the retina, the focusing temperature can reach 70 degrees Celsius, which is obviously harmful to human eyes. In addition, when the laser radiation intensity exceeds the limit value, it can also affect the function of the central nervous system, leading to symptoms such as headache, dizziness, palpitation, insomnia, loss of appetite, trance and even pallor, cold sweat and shock in a short time.

People who often go to dance halls must pay attention to health care. For example, the theory of TCM health preservation "standing for a long time hurts tendons" and "walking for a long time hurts tendons". According to this theory, dancers must not dance for too long, but should dance for a while and have a rest. In addition, because dancing mainly uses feet, dancers must strengthen the health care of their feet. Chinese medicine believes that the following methods can be used for reference:

Zuyi health care

Feet are gathered by yin veins, and Yin Qi is always abundant. Knees are the house of tendons, and they are prone to cramps due to cold. Therefore, knees should pay special attention to keep warm and protect their yang.

Zu Qin Yi runs Xi.

Soaking feet with warm water can promote blood circulation, which is good for the heart, kidneys and sleep. Trivial records? Miscellaneous notes say: "It is enough for people to wash once a night", which shows that people have long regarded "a pot of soup before going to bed" as one of the health care measures. Many long-lived old people and scholars at all times and all over the world believe that washing feet often is very beneficial to health and longevity.

Medicated foot protection

In autumn and winter, due to the blockage of meridians, the skin is malnourished, the skin is dull and the feet are often chapped. It can achieve good preventive and therapeutic effects by applying Chinese medicine with the functions of dispelling cold, promoting blood circulation, moistening dryness and moistening skin to feet.