Wholesale mattress for a long time, people have long believed that for those old people who shout back pain, good sleep hard bed, if want to sleep a mattress, also should sleep very hard mattress. In order to verify whether this tradition has scientific truth, Spanish scientists nearly made a related experiment. The experimental results show that for patients with back pain, to reduce their waist ache mattress type for the medium hardness, rather than the people often say that hardness of board level. The researchers explained, because hard mattess can offer better support for the whole body, so the doctor also suggested that patients with back pain commonly use hard mattress. Experiments show, however, to relieve back pain itself, chooses the mattress should be moderate hardness, not too hard. The researchers said, the waist is easy to go wrong in the human body each place of one of the places. Most people at some point in their lives, or because of injury, or because of careless with waist, or because of accident, will leave back pain symptoms. Light person, hurt a few days, the person that weigh, can ache in months or years, even become a lifetime of trouble. At the same time, few people know that people spend the cost in the treatment of back pain is astonishing. For example, americans spent on treatment of back pain every year cost up to $50 billion. Spanish researchers studied 313 backache patients did sleep hard mattress or moderate hardness mattress contrast test. They asked the subjects to choose the mattress sleep casually, then report to the researchers at night and wake up in the morning they waist specific feeling. Three weeks later, with those reported in patients with sleep hard mattess, selection of patients with moderate hardness mattress reported back pain feeling is greatly reduced, at the same time of wake up how easy it is to have improved significantly. Researchers said, the use of medium hardness of the mattress is using hard mattess can improve the clinical symptom of most patients with back pain. Although hard mattess can effectively support the entire body, but its hard degree hinder the mattress itself and human spine have good match between natural radian. As a result, doctors recommend mattress types in the patients with back pain, should be suggested that patients with moderate hardness of the mattress.