Slow chest compression acutely reduces dynamic hyperinflation in people with chronic obstructive pulmonary disease: a randomized cross-over trial.

Background: Strategies to minimize dynamic hyperinflation (DH) and dyspnea, such as slow chest compression (SCC), are relevant in people with chronic obstructive pulmonary disease (COPD).

Objectives: To analyze the acute effects of SCC after exercise on DH and dyspnea in people with COPD and to identify responders to the technique.

Methods: This is a cross-over study with 40 patients.

A performance comparison of the 20 and 30 meter six-minute walk tests among middle aged and older adults.

: To compare the performance of the Six-Minute Walk Test on 20-meter (6MWT) and 30-meter (6MWT) tracks and to test the validity and reliability of the 6MWT in middle-aged and older adults.: The subjects underwent lung function assessment and performed the 6MWT and 6MWT. Student´s tests or Wilcoxon tests were used to compare the variables.