![Manypeoplehurttheirbackswhentheytrytoliftheavythingsfro...]( "Manypeoplehurttheirbackswhentheytrytoliftheavythingsfro...")
- 問題詳情：Manypeoplehurttheirbackswhentheytrytoliftheavythingsfromthefloor.Itiseasytohurtyourbackmuscle(肌肉)whenyoutrytopickupaheavything.However,thereisacorrectwaytoliftthingsfromthefloor.Ifyoupickupheavythingscorrectly,youprobablywillnothurtyourback...
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