EE WAS LIFTING A BOARD OVER HIS HEAD WHILE HE WAS IN A SITTING POSITION. HE WXPERIENCED BACK PAIN AND WAS UNABLE TO RETRUN TO HIS NEXT SCHEDULED SHIFT. ON JAN 8, 2001 SMC RECEIVED A MEDICAL OP ION THAT THE INJURY WAS NOT A PRE EXISTING CONDITION, WHICH MAKES IT A REPORTABLE, LOST TIME ACCIDNT.