Regarding the mattress's firmness requirements, China is very different from the West, with older generations generally preferring harder mattresses and Westerners preferring softness. In fact, too soft mattresses can not make our spine to maintain the most comfortable S-shaped, are not a good choice. A good mattress needs to be balanced in the distribution of weight, or to allocate lying body pressure. This is a key technology as the human body is actually changing. The trick is that the mattress as a whole has good rigidity, but it is necessary to adjust the density of the coil springs in different areas of the mattress surface so as to withstand the different loads generated by various parts of the body.
What is the hardness of a good mattress? Thirty years ago, there was a good discussion in Germany about whether it was a good mattress or a soft mattress. The discussion led to the involvement of the German ergonomics community and led to a study of human sleep posture.
The result of the study is that whether a good mattress or a soft mattress is unfavorable to human health, the correct mattress should be a highly elastic mattress, that is to say the mattress should drop when the force exerted on the mattress is large Much more and gives more support to the human body, and vice versa. This is because the human body is a curve. Only the highly elastic mattress can support both the human body and the back. In particular, the waist should have strong support so that various parts of the body can be relaxed and fully rested. Due to the shallow S-shaped body spine, when lying down need to have the appropriate hardness of the support, so the flexibility of the mattress on the human body's degree of comfort and quality of sleep is essential.
Select the mattress can not simply rely on the feeling of self, too soft or too hard are not appropriate, but should be based on differences in height and weight of multiple considerations. Slightly lighter to sleep softer bed, slightly into the shoulder buttocks mattress, the waist is fully supported. The heavier weight suitable for sleeping hard mattress, the strength of the spring can give each body proper care, especially the neck and waist can be well supported. You can refer to the height, weight and mattress hard and soft table, it will be more scientific.