Abstract
Among diseases and injuries of the crew, gastrointestinal disturbance occurred at a high rate. As the causative factors irregularity of meal time because of watch service and others are suspected. Three members of the crew whose watch time was 12.00-4.00, when occurrence of gastrointestinal disturbance was especially frequent, were selected and their digestive function was examined to observe influence of heat and food on the crew of this route. The results were as follows: Because of watch service their meal time was irregular. In one of the three subjects degestion rate was quite low especially as to protein. It is supposed that inate weakness of gastrointestinal function became apparent when the subject was exposed to strong stress.
