Ergonomic Chair Sitting Posture Tutorial

1. The correct height of the seat cushion must be adjusted so that your feet can be placed flat on the ground, and the bending angle of the thigh is 90°.

2. The correct seat cushion depth should sit your buttocks to the innermost part of the seat cushion, and adjust the seat cushion depth appropriately so that the seat cushion can effectively support more than 2/3 of the thigh area, and make the bending angle of the thigh and calf 90°.

3. The correct armrest height should be adjusted until the arm and elbow are at 90°. At this time, the arm hangs down naturally without any hanging shoulder feeling. Long-term unsupported or poorly supported arms will cause shoulder pain or frozen shoulder, which will have a huge impact on health.

4. The correct back pad angle should completely attach the entire back to the back pad, so that the back spine can be relaxed to a certain extent, and then the fatigue of the back spine can be effectively relieved and chest and back pain can be prevented.

5. The correct waist height should be adjusted to the position of the third, fourth, and fifth lumbar vertebrae, because when the human body is in a sitting posture, except for the legs and buttocks, the weight of the whole person is borne by the lumbar vertebrae. Therefore, adjusting the waist height correctly can help prevent tendon or fasciitis, disc herniation, spondylolisthesis, lumbar muscle sprain, degenerative spondylitis, sciatica, etc.

6. When operating the depth adjustment of the seat cushion, the seat cushion needs to be slid out by relying on the power of the buttocks. At this time, the back needs to rely on a fixed back cushion, so that the force is sent from the buttocks. If the back cushion is not in a locked state, the back cushion will Loss of the power to rely on, resulting in the inability of the buttocks to exert force, and the seat cushion does not slide smoothly.

7. The correct angle of the armrest pad should be able to give your hand or elbow moderate support anytime and anywhere. Long-term lack of proper support for your hand or elbow joint may easily cause wrist tunnel syndrome and elbow syndrome. Of course, it is related to the cervical spine. Protection also has a certain relationship.

8. The correct height of the headrest should be adjusted to the third to seventh section of the cervical spine, so that the cervical spine can be properly supported, effectively relieve the fatigue of the cervical spine, and prevent bone spurs or chronic spinal degeneration.

9. The correct elastic adjustment of the back cushion should take the weight of the back as the standard to properly adjust the elastic size of the back. If the elastic force is greater than the weight of the back, it will be difficult to recline or it will not be easy to recline and cause discomfort. , if the elastic force is less than the weight of the back, there will be a feeling of insufficient support or a sense of insecurity caused by the rapid backward leaning of inadvertently leaning back.