EMPLOYEE WAS LIFTING AN ITEM IN AN AWKWARD POSITION AND STRAINED HIS BACK. THE ITEM WAS REPORTED NOT TO BE VERY HEAVY. EMPLOYEE WAS LOADING A RAIL CAR. HE WAS M0VING A LOADING HOSE FROM ONE HOLE TO ANOTHER. IT APPEARS THAT HE LIFTED AND TWISTED WITH HIS BACK AT THE SAME TIME. RESULT WAS PULLED MUSCLE.