The purpose of this study was to investigate the effect of inspiratory muscle training on phonation
performance in chronic stroke patients Sixteen with chronic stroke patients were randomized in 2 group,
inspiratory muscle training(IMT) group of 8(experimental group) and control group of 8 was selected and
ranged from 52 to 67 years old. In the experimental group, Inspiratory muscle strengthening exercise for
20minutes duration 3 time per week for 6 weeks, were respectively performed. Control group was not
treated inspiratory muscle strengthening exercise. In comparison of difference of phonation performance
before and after experiment, maximum phonation time to measure respiratory and sound control and
sequential motor rates and alternative motor rates to measure diadochokinesis of articulation mechanism
were measured in all patients. Every voice was recorded three time using recorder(model: Roland R-09H)
and saved wav files. All data deals with Wilcoxon test at each group. Significant differences were found in
the MPT and SMR of experimental group. There show MPT at after-IMT of chronic stroke patients was
longer than before-IMT at experimental group, but was not different at control group. There was not
significantly difference in AMR between before and after-IMT at two group. The inspiratory muscles
training was effective in improvement of aspiratory performance and vocal fold function for chronic stroke
patients.