Morphological measurement was carried out on 43 representatives of Sumo-wrestlers, with the object of throwing light on their body build which is the largest size amoung all Japanese. The most superior measurement was found in the skinfold-thickness amounting four times the normal value, followed by+70% in the body weight and +50-+20% in the circumferances of trunk and limbs. But superiority of the skeletal growth shown in the stature, limbslength and -breadth is much less, as little as +4-+8%. Although their body size had been pretty larger than the average Japanese already when they entered their Sumo-school, there are enough evidences that the daily life at Sumo-school has accelerated their growth up to the abnormal level. They spend their daily life in such conditions as that they bring all their strength into play only half an hour before the breakfast early in the morning without any physical effort in other time, and take a lot of meal generally containing much fish meat, Tofu (soybean curd) and vegetables “up to mouth”, taking no cake between meals and no smoke at all.
For the purpose of determine the most effective diet for the flight officers and crew, we have done these experiments. At first, we found that there was the variation on the value of Flicker-test for the men in flight. Then we wanted to find the most effective diet for the Flicker-test value of the man in flight. And that diet must be taken on usual way and time every day, not only just before or in flight. We divided the selected men in 8 groups, and let them ate the diets of different ratios of carbohydrate, fat and protein from three days before the flight. Then the variation of Flicker-test value of them in 5 hours flight were compared. The diet contains 100gr. of fat (25-29%) showed the most good result on the case of this experiment.