剑桥雅思3听力真题原文:Test1—section4(4)

2022-06-14 13:53:48

  

  Also,studies have shown that just one hour sitting ina slouched position can strain ligaments in the backwhich can take months to heal.At the clinic we havecome to the conclusion that the major cause of theproblem is not with the design of chairs,as somehave suggested,but in the way WE sit in them.It canbe useful to get special orthopaedic chairs,butremember the most important improvement shouldbe in OUR posture.

  Another enemy of your back is,of course,yourbeds.If your bed doesn't give enough support,backmuscles and ligaments work all night trying to correct spinal alignment,so you wake up with atired aching back.Try out an orthopaedic mattress or a spring slatted bed.Research shows thatboth can be beneficial for certain types of back pain.

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