(1) On the carbohydrate metabolism of the inhabitant in Sado-island who are accustomed to take much rice for their every meal (400.900 g), no significant abnormalities of blood sugar, measured by Hagedorn-Jensen's method, are noticed, compared with the normal Japanese standard, which is tested on those persons taking about 270 g. of rice as one meal.
Before breakfast, the average amount of blood sugar of these persons is 80 mg %. An hour later after their usual meal, blood sugar increases up to 120 mg %, the maximum, and then it decreases down to 80 mg % in two to three hours.
(2) Blood sugar of the persons during muscular work continued for four hours after a usual meal is elevated, but, as generally accepted, to a less extent, compared with the case when no work is performed after the meal. Occurrence of the sensalon of hunger or fatigue during work is observed not to be closely related to the blood sugar.
(3) Blood sugar of the persons, during four hours' work performed after taking half as much vs the usual meal, is elevated, but to a less extent, compared with the usual case. In the former case, some abnormalities of the blood sugar are observed in seven persons, who are suffering from liver enlarkement or hyperchromic anemia, but no hypoglycemia is observed in the other three healthy persons. Moreover, in the former case, the circulatory adjustment in these three healthy persons is more precisely performed during work, while in the latter some abnormalities in the blood pressure are noticeable.
(4) In this district, it is rather COM: 110D that people take breakfast after having finished three or four hours of muscular work ; in those persons the blood sugar level is founl abnormal. The blood sugar after the meal reaches its muximum more rapidly and conspicuously ; and this amount of sugar remains longer than in other cases.
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