EMPLOYEE WAS HELPING TO INSTALL A SET OF ROLLERS ON THE IMPACTOR CONVEYER. HE TURNED TO GET A PRY BAR, AFTER DOING SO HE BEGAN TO COMPLAIN OF PAIN IN HIS BACK. HE CONTINUED TO WORK HIS SHIFT T HAT DAY. WENT TO THE DOCTOR 1-7-2000, AND WAS DIAGNOSED WITH A STRAINED BACK MUSCLE. TOLD TO STAY OFF WORK A FEW DAYS AND GIVEN PAIN MEDICATION.