EE WAS DOING A BELT MOVE. AS HE GATHERED UP TOOLS AND CLEANING UP AREA, EE SLIPPED BUT DID NOT FALL. EE TOLD CO-WORKER HE COULD NOT STRAIGHTEN UP OR WALK DUE TO TWISTING HIS BACK. EE WAS TAKEN TO HOSPITAL VIA AMBULANCE. EE WAS DIAGNOSED WITH A LUMBAR STRAIN. EE STARTED P/T ON 9/2/2015. THIS IS BEING REPORTED AS A MEDICAL TREATMENT (NDL).