筋労作持続時間を指標として観た蛋白質摂取量について

抄録

Using white mice and making them exhaust by forced swimming, the protein intake and the time required for total exhaustion were compared.
1. The muscular exhaustion was forced on once daily to the animals. The more fatigued the animal, the more inhibited the increase of body weight, though the nitrogen balance was kept apparently normal-i. e. in the urinary nitrogen, the work caused no alteration in nitrogen metabolism.
2. The time of exhaustion was the longest in the protein free group (protein0%), and the shortest in the protein rich lot (po25%), while the low (po7%) or the medium (po13%) series came in between, showing any appreciable difference each other.
In short, it looks as though that so far as the supplies of carbohydrate, fat, vitamins and salts are sufficient, the increased protein supply plays little role-the necessary protein being of the order of 6Cal% to 12Cal%.