Ee worked a double shift starting at 3Pm on 3/7 thru 6AM 3/8. By the end of the shift he was stooped over and walking strange. He reported it to the shift forman and told him he was ""stiff from the cold night air"". He went home and could not rest. Called the plant about noon and requested to be seen by a doctor. No specific incident remarks. Ee placed on light duty