EE WAS COILING UP 2"" AIR HOSE ANDHANGING ON 'S' HOOK, AS HE WAS PULLING SLACK IN ORDER TO HANG. FELT PAIN IN LOWER BACK. REPORTED TO MED-CORE ON SITE AND WAS TOLD TO SEEK MEDICAL ATTENTION. EE WAS PLACED ON 2 DAYS RESTRICTED DUTY WITH PRESCRIPTION MEDICATION.