A properly designed work chair should have the following two support points for the human back:
1. There is an adjustable surface on the upper back to support the thoracic kyphosis;
2. Adjustable lumbar support at the lower back to support the lordotic lumbar spine.
3, can adjust the neck support. For users who need to frequently relax their head and neck, the height and angle of the neck support determine the fatigue of your cervical spine. A reasonable neck support should be adjusted to the cervical spine in sections 3 to 7 so that The necessary support of the cervical spine effectively relieves the fatigue of the cervical spine, and an adjustable neck pillow at the head and neck realizes the support to the lordosis cervical spine is essential for relieving fatigue.