Health diagnosis
Dancing can get the effect of exercising. When dancing, people are in a state of exercise, which accelerates myocardial contractility, increases cardiac output, accelerates blood flow and deepens breathing. This is a good exercise for the heart and lung system. Light music and happy mood can relax nerves, relieve muscle tension and improve blood circulation. Disco, yangko and other dance movements are based on the twisting of the waist, which drives the joints and muscles of the upper and lower limbs to move regularly and rhythmically. They can not only exercise limb tissues, but also effectively prevent and treat diseases such as osteoporosis, osteoarthritis and muscular atrophy, and also enhance the function of internal organs, which has an excellent effect on improving vitality. The effect of ballroom dancing is similar to that of walking. Someone conducted a special test for this purpose, and the results showed that an hour's waltz (medium speed) was equivalent to walking 2 kilometers.
However, soaking in the dance floor for a long time is very harmful to your health. Especially middle-aged and elderly people or people with poor health. Because there are three dangers in the ballroom:
1. air pollution air pollution in dance halls is the most harmful to human health. Due to the high density of people, frequent activities and frequent dust, the room is full of countless dust. Pathogenic microorganisms hidden in every corner of the room also drift around with the dust. On the other hand, some people with infectious diseases will also mix in the ballroom and spread germs when dancing. Some people have made measurements and found that the bacterial content in the air per cubic meter of the ballroom is as high as 4 million, which is 4000 times that of ordinary rooms. When dancing, because of physical fatigue and decreased resistance, it is easy to be invaded by germs.
2. Light pollution. The laser lights installed in the ballroom are strong and dazzling, coupled with high-speed rotation, the colors are flickering and changing rapidly, which will make people see things in a blur. German scholars have investigated and measured the laser equipment of 1 1 disco, and the results show that the laser radiation intensity of most of the discotheques has exceeded the specified limit. When the dense laser beam is focused on the retina through the lens of the eye, the temperature of the focus can reach 70℃, which is very harmful to the human eye. When the laser radiation intensity exceeds the limit value, it will lead to vision damage. The function of the central nervous system is disturbed, resulting in headache, dizziness, palpitation, insomnia, trance, loss of appetite, neurasthenia and other symptoms. People with poor physical fitness and mental illness may experience dizziness, pallor, sweating, even unconsciousness and shock in a short time.
3. Noise pollution. The harm of ballroom noise to human body should not be underestimated. According to the test, the power combination sound in the ballroom is generally above 80 ~ 98 decibels. Experiments show that if people are in an environment exceeding 80 decibels for a long time, the auditory tissue of the inner ear will undergo degenerative changes, and the sensitivity will be reduced, resulting in hearing loss and even occupational deafness. A survey of 20 patients with neurological deafness in Japan found that these patients had a long history of disco dancing. In addition, noise can also cause vasospasm, rapid heartbeat and high blood pressure, which interferes with and affects the digestion and absorption function of the human body.
Cultivate good habits
In order to prevent the above hidden dangers from endangering health, dance lovers should pay attention to the right amount. Dance time should not be too long, especially don't take part in the dance with laser for a long time. In addition, the ballroom should be kept clean and hygienic, pay attention to air circulation, install air conditioners and air negative oxygen ion generators where conditions permit, and adjust and update the ballroom air. The sound of dancing music or songs in the ballroom should not be too loud, and should be kept below 65 decibels. The laser should not be too strong and the light should not be too dim.
Life tips
Dancing is a beautiful enjoyment and a healthy exercise. But according to their own physiological characteristics, the elderly should pay attention to the following special problems.
1. It is not advisable to skip violent dance. The elderly have poor cardiovascular elasticity. Crazy dancing excites sympathetic nerves excessively, leading to accelerated breathing, rapid heartbeat and sudden rise of blood pressure, which can induce or aggravate cardiovascular diseases.
2. Don't dance on your stomach. The digestive function of the elderly is poor. Dancing with a full stomach will affect the digestive function and lead to gastrointestinal diseases.
3. Don't suddenly cool down. Dancing may make the body sweat and thirsty, so when the elderly dance in the morning and evening, don't take off your clothes at will to prevent colds and other diseases; Don't eat too many cold drinks to avoid respiratory diseases caused by the stimulation of low temperature.
4. Don't dance after drinking. Alcohol can stimulate the brain, make the heart beat faster and blood vessels dilate. Dancing after drinking can also induce angina pectoris and brain accidents.
5. Don't wear hard shoes. The floor of the dance floor is smooth, and it is easy for the elderly to slip when dancing with hard-soled shoes, so be careful of sprains or fractures. At the same time, hard-soled shoes have poor elasticity and large ground reaction force, which is harmful to tendons and joint tissues of calves.
6. Don't dance if you are sick. For people with cardiovascular diseases, dancing can easily lead to high blood pressure and cardiovascular diseases; Hernia, gastroptosis and rectocele may aggravate symptoms due to dancing; Old people with otogenic vertigo, cervical spondylosis and other diseases are often prone to fall, and in severe cases, fractures may occur; Old people with infectious diseases should not dance, so as not to infect others and affect their own recovery.
—— Quoted from Master of Disease Prevention by Yanbian People's Publishing House.