Inspiratory Muscle Training on Respiratory Muscle Function，Quality of Life and Exercise Capacity in Stable COPD

Threshold inspiratory muscle training device (Threshold Inspiration Muscle Trainer, Respironics Inc; Pittsburgh, Pennsylvania, USA). The intensiy of IMT was adjusted and verification using Pm measurement in laboratory. Patients spontaneously breathed using resistive-IMT and their Pm were measured simultaneously. Adjusted the intensity of resistive-IMT from small to large according to the Pm waveform. Adjustment completed while mean Pm achieved 60% of MIP and maintained at least 15 minute. Likewise, eligible patients in these group used the resistive IMT device for 15 minutes, twice per day, with an inspiratory load at 60% of PImax as previously adjustment. Training loads were adjusted to maintain 60% of the PImax every week.

Resistive inspiratory muscle training device(PFLEX, Respironics Inc; Pittsburgh, Pennsylvania, USA). The intensiy of IMT was adjusted and verification using Pm measurement in laboratory. Patients spontaneously breathed using resistive-IMT and their Pm were measured simultaneously. Adjusted the intensity of resistive-IMT from small to large according to the Pm waveform. Adjustment completed while mean Pm achieved 60% of MIP and maintained at least 15 minute. Likewise, eligible patients in these group used the resistive IMT device for 15 minutes, twice per day, with an inspiratory load at 60% of PImax as previously adjustment. Training loads were adjusted to maintain 60% of the PImax every week.

Conventional therapy without any inspiratory muscle training program