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Quality of sleep,as influenced by mattresses with various degree of firmness

WANG Chuhuai,ZHUO Dahong,XIONG Youzheng,et al.Dept.of Rehabilitation Medicine,First Affiliated Hospital,Sun Yat-sen University,Guangzhou, 510080  
Objective:To investigate the various effects of the mattresses with different firmness on sleep quality. Method:Thirty healthy subjects(17 men,13 women,28 to 52 years old)volunteered for the experiment spending three consecutive nights in the same bedroom.Each subject was asked to sleep in turn on three mattresses with different firmness with one type for one night,including innerspring mattress,wooden board mattress and sponge mattress.Ergocheck Measuring System and Infrared Video Camera were used to detect the body movement,body mattress interface pressure and body mattress interface area during sleep.For every test session,each subject accepted sleep quality evaluation with Sleep Quality Questionnaire(SQQ)and Self-feeling Scale of Sleep(SFSS)next morning.Result:①When using innerspring mattress the scores of SQQ and SFSS of the subjects were superior to those when using board mattress or sponge mattress(P0.05).②The amount of body movement of the subjects were less when using innerspring mattress than that when using board mattress or sponge mattress(P0.05).③The pressure and support of the buttocks,scapular and low back of the subjects to the mattress showed more desirable when using innerspring mattress than those when using board mattress or sponge mattress.④No matter lying on the back or on the side,the body mattress interface area on the innerspring mattress showed more acceptable,which was between the values on the board mattress and on the sponge mattress.Conclusion:The firmness of a mattress may affect the quality of sleep directly.An innerspring mattress with medium firmness could help the sleeper enjoy a better sleep than the hard board mattress and the soft sponge mattress.
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