Surprising finding changing what has been held as "conventional wisdom" for years.  This study shows that carrying more weight does not lead to disc degeneration, and in fact may provide some benefit in disc health and bone density.
http://www.thespinejournalonline.com/article/PIIS1529943009010225/abstract?rss=yes

A systematic review of the literature investigating occupational bending and twisting as a causative factor in low back pain.  Ultimately shows that the literature is conflicting on this, and demonstrates a weakness in relying solely on research for recommendations and determining causation.  Does state that bending and twisting is not likely the sole cause, but stops short of saying that it is a factor.  This would seem to defy what is common sense if you have experienced LBP associated with work.
http://www.thespinejournalonline.com/article/PIIS1529943009002733/abstract?rss=yes

Another systematic review examining awkward occupational postures at work and their relationship to the development of LBP.  Again, as above, there seems to be no relationship according to current research.  These two studies complicate what is commonly thought of as contributing to LBP.  They really show how complicated and multifaceted low back pain is.
http://www.thespinejournalonline.com/article/S1529-9430%2809%2900913-9/abstract