the results showed that 1 ) except for inspiratory muscle endurance and fev1/fvc , men had greater respiratory muscle and pulmonary functions than women , 2 ) respiratory muscle function and pulmonary function decreased with age , 3 ) smoking tended to lower duty cycle and fev1/fvc and to enhance pe , mmax , and 4 ) inspiratory muscle endurance was greater in men who were physically active than in those who were sedentary .
C0035203
respiratory
C0004048
inspiratory