时间：2017-10-18 作者 ：管理员
Physiological characteristics and sitting height of human sitting posture
Sit down is one of the natural posture, from the view of physical exertion, when standing, joints, knees and hips are based on static muscle activity to maintain posture, blood and body fluid tends to accumulate in the legs; and sit down, muscle force stop, reduce energy consumption, reduce the leg static pressure vessels. The blood return to the heart of the resistance is reduced, therefore, more conducive to the blood circulation than sit stand. It allows people to relax and rest.
The sitting posture can be roughly divided into three types: forward sitting, sitting, leaning back end pen. Forward sitting posture is mainly working posture, sat back rest and relaxed posture. When people sit forward, human pelvis rotation into tilt state, also do the corresponding sacral movement, and tend to the level of the sacrum and the flattening of the lumbar spine, spinal kyphosis caused by spine become above the waist, looks like a hunchback; when the pen end when sitting in a vertical state, pelvis, sacrum position is vertical, and spine in the formation of lumbar lordosis. The physiological characteristics of human sitting posture are analyzed. These conclusions and experimental results can be used to derive various functional sizes that affect the comfort of seat.
In addition, tall refers to the seat to the ground vertical distance, if the seat back inclination or there is concave arc, a high seat front center point to the ground vertical distance. Seat height directly affects the performance and function of the seat itself. Foshan office furniture after the study that: under normal circumstances, the work of the chair seat height is higher, rest chair is slightly lower. But no matter what, tall should design appropriate, tall high, feet dangling not touch the ground, then the weight crushes the thigh blood vessels, prevent blood circulation, prone to fatigue; if the height is too low, is required to support the weight of the calf thigh, slightly for a long time will cause the upper body aching discomfort, and tall low up will cause inconvenience, especially for the elderly, particularly prominent.