Correct sitting posture
The angle between the line of sight and the geocentric vertical is about 1 15, which means that the computer screen is slightly lower than the parallel line of sight.
The body was about a punch away from the table. When operating the keyboard, the elbow should be flexed about 90, and the wrist should not be lifted up or pressed down. There should be supporting handrails on both sides to relax the neck and shoulder muscles.
It is best to have wheels on the chair, and the backrest is curved to fit the back. After sitting down, the soles of your feet should touch the ground, and the height of your knees should be slightly lower than or equal to the height of your hips.
Working posture
Choose a chair with a backrest and put a lumbar pad on it.
Try to move the chair forward and send your hips back before sitting.
After sitting down, I feel that the ischial tubercle of my hip is firmly sitting in the chair.
Put your hands on the table, support your body with your elbows, and feel your shoulders sink.
Put a book in front of your body, put it on your chest, and tighten your abdomen slightly.
At this time, the weight of the body is transferred to the ischial tubercle through the bone, and the upper body can be supported by the elbow joint, so that the chest will not lean forward excessively because of the book.
Rest posture
The backrest of the chair is high enough to rest the whole spine directly on the backrest.
The chair back is not high. Put your back on the back of the chair and cross your hands behind your neck.
The chair has no backrest, so you can hold your chin with your hands, put your elbows on the table, keep your body relaxed and close your eyes for 5 minutes.
Stretch the muscles of the back thigh and chest and abdomen.
Sit with your knees straight and your instep up.
Slowly straighten your back, bend backwards, raise your hands at the same time, and open your chest backwards and upwards.
Keep moving for 30 seconds and do 7 groups.