The dance of ＂subject three＂ caught fire, and the doctor reminded me to be careful of injuries.

　　"Subject 3", can you know it? This "subject three" is not the subject three for our driver’s license test, but a dance. Recently, this dance has caught fire from some restaurant brands. Just say "I want subject three" to the waiter and they will give you a magic dance on the spot. Don’t be in a hurry to be happy, this "subject three" looks simple, but it’s not easy.

　　This magical and brainwashing dance is the recently popular "Subject 3". Waiters are very proud of bringing happiness to customers, while customers enjoy dancing while eating and feel very satisfied. However, it is worth noting that "subject three" looks at simple movements, but the requirements for people who jump are not low. Recently, a hospital in Changxing County, Huzhou City, Zhejiang Province received a younger brother after 00. After jumping "Subject 3", his knee pain was unbearable and he could not squat down. After imaging examination, he was diagnosed as a contusion of the tibial plateau.

　　Zhang Xuejun, deputy director of the Center for Orthopedic Joint and Sports Medicine, Zhongda Hospital affiliated to Southeast University, said that there are about three movements in dancing: one is to shake hands, the other is to shake the waist, and the other is to shake the lower limbs from side to side. This action may be acceptable to young people or people who exercise regularly, but it is not suitable for all ordinary people to imitate.

　　The most vulnerable point is the left-right swing of the lower limbs, because our knee joint is a uniaxial joint and can only move around one axis. The movement of "subject three" is accompanied by swinging from side to side, which obviously does not conform to the exercise physiology of the knee joint, so it is particularly easy to cause injuries to the knee joint and ankle joint.

　　The doctor said that the knee joint is covered by joint capsule and four main ligaments, which maintain the stability of the knee joint. There is also a structure called meniscus in the middle of the knee joint to cushion the stress of exercise. In the "subject three" movement, the ligaments and meniscus are the most vulnerable. If it swings widely and for a long time, it will even cause fractures.

　　Zhang Xuejun said that the knee joint, ankle joint and skeletal system of middle-aged and elderly people have degenerated. In this case, we should pay special attention to doing some warm-up exercises before dancing and making reasonable exercise intensity. If you accidentally sprain it, you should stop this kind of exercise immediately. For joint sprain, orthopedics, especially sports medicine, emphasizes a "rice" principle, and "R" means rest. To rest, the first step is to stop exercising; "I" means ice, which means ice, and local ice can be applied to reduce swelling caused by bleeding; "C" is compression, which means compression. You can find some bandages to apply local pressure to prevent swelling from getting worse. The last "e" is called elevation in English, which means elevation. If you sprain, you can lie on your back, and the lower part of your leg is about ten centimeters high.

　　Cushion your legs and keep them 10 cm higher than your heart. This position can reduce swelling and pain. If you feel particularly painful after spraining, or hear abnormal joint sounds, you should go to the hospital for treatment in time.

(Jiangsu News Channel/Xu Ying Editor/Jiang Jie)