背筋はいきんhaikin背はい筋きん背はい筋きんShow answer(Space)Suspend(@)背はい筋きん背はい筋きんhaikinNoun (common)Noun (common) (futsuumeishi)Noun (common)muscles of the back; back muscles背はい筋きん背はい筋きんhaikinmuscles of the back; back musclesWhat does 背筋 mean in English?muscles of the back; back muscles(n)Search the picture dictionary for 背筋