EE WAS CHANGING ROLLERS ON A BELT. HE WAS USING A WOODEN TROLLEY POLE TO PRY UP THE BELT SO ANOTHER WORKMAN COULD CHANGE THE ROLLER. AS HE PUSHED UP ON THE BELT HE FELT PAIN IN HIS BACK. IMPRO VED LIFTING TECH EARNED THE INJURY ALSO FELT PAIN IN LEFT LEG. NO OTHER FACTORS WERE INVOLVED.