The guest introduced Wen Jianmin.
Member of the Chinese People's Political Consultative Conference, Director of Orthopaedics, Wangjing Hospital, Chinese Academy of Traditional Chinese Medicine. Vice Chairman of Orthopedic Committee of China Association of Integrated Traditional Chinese and Western Medicine, Vice President of Orthopedic Branch of China Talent Society, President of Traditional Medicine Branch of Beijing Rehabilitation Medical Association, Director of Physical Disability Committee of China Rehabilitation Society for the Disabled, Member of Foot and Ankle Surgery Group of China Orthopedic Society, Honorary Dean of Brazil International College of Traditional Chinese Medicine. 20 13 The NPC and CPPCC called for the establishment of China Mother's Day.
Yong Cheng
Which backpack is healthier?
(1) shoulders VS single shoulder
Because one shoulder is unevenly stressed, there will be many problems. If you can choose, try to choose both shoulders.
⑵ Thick shoulder strap and thin shoulder strap
The thin shoulder strap is pressed on the shoulder, and the stress area is very small, so the pressure naturally increases, and the long back will be very uncomfortable, and the muscle strain of the shoulder and neck will be aggravated. Never choose a metal chain belt with excellent material.
(3) Long wave band and short wave band
When the backpack is wrapped, the fulcrum of the force is on the shoulder, just like the lever principle. The longer the belt, the higher the resistance arm and friction force. In order to reduce the stress on the shoulder, it is best to shorten the shoulder strap.
(4) Back in front and back in back
Put the bag between your arm and torso and gently hold it with your hand. This way of putting your back in the middle can reduce the burden on your shoulders, which is a good choice for people who have to carry a shoulder bag. If you don't like it, it's better to move the bag back than forward. There are more muscles in the back than in the chest and abdomen, and they can bear more forces. More importantly, if you put your bag on your back for a long time with gravity in front, your body will unconsciously lean forward and hunch over, which will greatly affect your appearance, while your back is conducive to keeping your body straight.
5] arm in arm
Holding the bag with your hand, the joints of your arm need to swing back and forth, flexion and extension, which is easy to cause tennis elbow. Holding a bag on your arm can exercise biceps brachii. If one arm is held aside for a long time, it is easy to have one arm thick and one arm thin. Moreover, if the arm is bent for a long time, the muscles are more likely to get tired. Experts remind that when using these two methods, it is necessary to reduce the burden of bags and often rotate left and right hands.
Injury caused by a big bag on the back
● Neck muscle strain
Carrying a bag, the most direct victim is the muscles that lift the scapula on the shoulder and neck. When carrying a backpack, the human body needs to lift the shoulder to resist the fall of the backpack, and the trapezius muscle that lifts the shoulder should contract the levator scapulae. In addition, the trapezius muscle is compressed by the belt, which is easy to be overworked or overloaded, leading to ischemic pain.
● High and low shoulders
When carrying a big bag on one shoulder, the shoulder and neck will be unconsciously lifted due to the large gravity on one shoulder. In order to prevent the bag from slipping, this lifting may be more serious. If you often use one shoulder for a long time, it will cause ugly shoulders.
Muscle tension in lower back
A person's body is like a Libra, which side bears the load, and the spine will bend to which side. In order to balance the spine, the muscles on the other side will be tense, resulting in relaxation of one side and tension of the other side. In the long run, some aseptic inflammation may occur in tense muscles, such as muscle strain and dislocation of spinal facet joints.