A good mattress should ensure that no matter which sleeping position the person is in, the spine can maintain a straight stretch, and the person lying on the whole body can be fully relaxed.
A mattress that is too soft will sag as soon as the person lie down, changing the normal curvature of the spine, causing the spine to bend or twist, causing the muscles and ligaments to be tightened and not fully relaxed and rested for a long time. This gives the feeling of backache and leg pain. The mattress that is too hard is lying on the top, only the four points of the head, back, buttocks and heels are under pressure. The rest of the body is not completely settled. The spine is in a tight and tense state, which does not allow the spine to rest and muscle relaxation. The effect, waking up is still feeling tired. Sleeping on such a mattress for a long time will cause a serious burden on the muscles and spine and damage health.
When choosing a soft and moderate mattress, the touch of the hand is not enough to identify the quality of the mattress. The most reliable method is to lie down and flip it around. A good mattress, there is absolutely no unevenness, the bed is sunken or the lining moves. You can also press the bed surface with your knees, or sit down at the corner of the bed and try to see if the mattress under pressure can be restored to its original shape quickly. A mattress with good elasticity can be restored immediately after being pressed.
A good mattress keeps the spine naturally stretched and fits perfectly with the shoulders, waist and hips, leaving no gaps. Lying flat on the mattress, the hand is stretched inward from the neck, the waist and the lower part of the hip to the thigh, to see if there is any gap; then turn to one side and try the same way. There is no gap between the concave part of the body curve and the mattress. If the hand can easily be inserted in the gap, the bed is too hard. If the palm is close to the gap, it proves that the mattress fits perfectly with the natural curve of the neck, back, waist, hips and legs during sleep. Such a mattress can be said to be moderately soft and suitable for rest and help. Sleeping mattress.
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