Description
人体正常脊柱生理结构有四个生理弯曲，即颈曲、胸曲、腰曲和曲。如果床垫太硬，会过度依赖肩、髓支撑，同样会造成脊柱扭曲。准确来说，硬板床不是指硬床，更不是光板床，选床板要记住“3:1原则”，即床垫不能硬到不变形，也不能变形太大，例如3厘米厚的床垫，手压时下陷1厘米的比例就比较合适。
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