SUPERVISOR STATED EMPLOYEE COMPLAINED OF A SORE NECK AT START OF SHIFT. EMPLOYEE WAS ASSIGNED TO TAKE A COVER OFF A PIECE OF EQUIPMENT. AS HE UNBOLTED FASTNERS HE FELT LIKE HE PULLED A MUSCLE DUE TO A BOLT THAT WAS TOO TIGHT. EMPLOYEE REPORTED IT TO SUPERVISOR AND HE WAS SENT TO THE HOSPITAL. DOCTOR DETERMINED IT TO BE A CERVICAL STRAIN AND ADVISED RETURN TO WORK 8/19/03.