The comfort angle of the sofa backrest is different, and the comfort is good at around 110 degrees, followed by 120 degrees, and the backrest inclination of about 100 degrees is the worst. The functional sofa is freely adjustable by the angle of the backrest and rests.
The height of the back of the sofa is preferably between the shoulder and the ear when sitting down. If the backrest is too high, the waist and the backrest are too far apart, and the waist will be fatigued due to nowhere to rely. The backrest of the sofa is too high and not beautiful; too low is not good for the support of the spine. If it is too low, the comfort is poor. Too high can easily lead to stiff neck and discomfort.
The height of the seat of the sofa should be the same as the height of the knee. If the sofa is too high and the feet are suspended, the weight of the human body will be concentrated in the legs, the back muscles will be tight, the load will increase, and the muscles in the legs and back will feel sore; if the sofa is too low, the back muscles will not be in In the natural state, the force surface of the thigh will be reduced, and for a long time, the muscles will feel sore.
If the sofa is too soft, people's weight will lose support, it is difficult to maintain the normal curvature of the spine, and the long time will make the back muscles tense, resulting in back pain and fatigue.