In contrast, for the patients in the moderate (SIAS score of 6–10 points for the paralyzed lower limbs) and mild (SIAS score of 11–15 points for the paralyzed lower limbs) classes, no apparent differences were found in the walking ability associated with increased amount of physical therapy exercise. All median FIMW scores at admission of the subjects in these classes were 4 points. Since the degree of independence in the patients was relatively high in these classes, the patients performed stand-up and ambulatory exercises voluntarily after physical therapy, and actively performed exercises in the ward with assistance from the ward staff and the their families. Therefore, the additional effects of voluntary training18) that influenced the amount of PT exercise were difficult to determine.