EE WAS OPERATING A BELT SPLICING MACHINE (MANUAL OPERATION) TO INSTALL A BELT SPLICE IN A 48"" BELT. AS HE WAS WORKING THE MACHINE HE FELT PAIN IN HIS BACK. HE WAS POSITIONED OFF TO THE SIDE OF THE MACHINE WHILE OPERATING IT INSTEAD OF BEING CENTERED OVER MACHINE. NO OTHER FACTORS WERE INVOLVED. POOR BODY POSITION CAUSED THE INJURY.