PURPOSE: The present study is designed to investigate benefits of a short outpatient program of IMT on inspiratory muscle performance, exercise capacity, perception of dyspnoea and the inspiratory fraction (IF).
METHODS: Thirty patients (24 males, 6 females) with significant COPD (FEV1/FVC= 46.21+/−6.7% predicted, FEV1= 33.6+/- 8.04 % predicted) were recruited in this study and had 3 months of IMT ( 30 minutes /day for 6 days/week) in an outpatient clinic.
RESULTS: Following IMT, there was a statistically significant increase in inspiratory muscle performance (an increase of the PI,max from 59+/- 19.1 % to 79+/- 21.85% pred; p= 0.0342), a decrease in dyspnoea (from 5.8+/- 0.78 to 1.9+/- 0.57 ; p=0.0001), an increase also in the distance walked during the 6MWT(from 245+/−52.37 to 302+/−41.30 m) and finally an increase in the IF (the new prognostic factor in COPD) from 27.6+/- 9.7% to 31.4 +/- 9.8%.
CONCLUSION: The present study concludes that in patients with significant chronic obstructive pulmonary disease, inspiratory muscle training results in improvement in performance, exercise capacity, sensation of dyspnoea and moreover an improvement in the prognostic factor IF.
CLINICAL IMPLICATIONS: Static lung hyperinflation has important clinical consequences in patients with chronic obstructive pulmonary disease (COPD). That most of these patients have respiratory and peripheral muscle weakness, therefore dyspnoea and functional exercise capacity may improve as a result of inspiratory muscle training.
DISCLOSURE: Barakat Shahin, No Financial Disclosure Information; No Product/Research Disclosure Information