Ergonomic chair sitting tutorial:
1. The correct height of the seat cushion must be adjusted so that your feet can lie flat on the ground, and the bending angle of the thigh is 90 °.
2, the correct seat cushion depth should be your hips to the innermost seat cushion, and appropriately adjust the seat cushion depth, so that the seat cushion can effectively support the thigh area of more than 2/3, and let the bending angle of the thigh and calf show 90 °.
3. The correct height of the armrest should be adjusted to 90 ° between the arm and the elbow. At this time, the arm hangs down naturally, and it feels correct without any hanging shoulders. If the arm is unsupported or poorly supported for a long period of time, it can cause shoulder pain or periarthritis, which has a severe impact on health.
4. The correct angle of the back pad should completely attach the entire back to the back pad, so that the back spine can be relaxed, and the fatigue of the back spine can be effectively relieved to prevent chest and back pain.
5. The correct waist height should be adjusted to the position of the third, fourth, and fifth lumbar spine, because when the human body is in a sitting position, except for the legs and buttocks, the weight of the entire person is borne by the lumbar spine. Therefore, correct adjustment of the height of the waist helps prevent tendons or meningitis, herniated discs, spinal vertebrae, lumbar sprains, degenerative spondylitis, and sciatica.
6. When operating the seat cushion depth adjustment, it is necessary to rely on the strength of the hip to slide the seat cushion. At this time, the back depends on a fixed back cushion, so that the power is emitted from the hip. If the back cushion is not locked, the back Losing the strength to rely on, causing the hips to be unable to exert force, and the seat cushion is not smooth.
7. The correct angle of the armrest pad should be able to give your hand or elbow moderate support anytime, anywhere. The long-term lack of proper support of the hand or elbow joint is likely to cause carpal tunnel syndrome and elbow joint syndrome. Of course, it is related to the cervical spine syndrome. Protection is also relevant.
8. The correct height of the headrest should be adjusted to the third to seventh quarters 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. Correct back cushion elasticity adjustment should be based on the weight of the loosened back as a standard to properly adjust the amount of elasticity of the back cushion. If the elasticity is greater than the weight of the back, it will reflect that it is difficult to recline or it is not easy to cause discomfort. If the elastic force is less than the weight of the back, a feeling of insufficient support force or an unintended rapid leanback may cause insecurity.