Nine typical Duchenne type PMD patients and much the same aged normal 9 children had carried out exercises of flexing their right elbows, pulling up the 1/2 weights of their 1 repetition maximum power—100 times every day for 4 weeks. Their ergograms were checked on every week-end and they verified that the increased proportions of the 1 R. M, of the pulling up frequency, of the total height and of the fatigue quatient in the cases of PMD patients were more than those of normal children.
After 4 weeks rest of the exercise their ergograms showed that the decreased proportions of the 1 R. M and the pulling up frequency in the PMD patients were almost in same degree as of normal children, while the fallen off rates in the total of pulling up heights and in the fatigue quatient of the formers were more remarkable than those of the latters.
Consequently it is concluded that the muscular endurance of a PMD patient is conspicuously increased by the exercise and is markedly decreased by a rest of the exercise.
Searching for the upper limit of the increase in the muscular endurance by exercises and the most adequate exercising time and hardness still remain as the problems of future.
