Lisboa 1997.

Study characteristics
Methods	Study design: RCT Study grouping: parallel‐group
Participants	Baseline characteristics IMT N (randomized/analyzed): 10/10 Loss to follow‐up or excluded: not reported Age, mean (SD) in years: 61 (6.32) Age (SD): 6.32 Gender (M/F): 6/4 Control/Sham N (randomized/analyzed): 10/10 Loss to follow‐up or excluded: not reported Age, mean (SD) in years: 64 (6.32) Age (SD): 6.32 Gender (M/F): 7/3 Overall N (randomized/analyzed): 20/20 Loss to follow‐up or excluded: 0 Gender (M/F): 13/7 COPD stage (GOLD): severe Included criteria A stable period of their disease Dyspnea during ADL FEV1/FVC < 60% The absence of cardiac or any other disease that could interfere with exercise performance Excluded criteria: not reported
Interventions	Intervention characteristics IMT: participants trained at home using a Threshold IMT device (HealthScan Products Inc., NJ, USA), for 30 min/d, 6 d/week for 10 weeks at 30% of PImax Control/sham: this group received a similar IMT protocol and trained at 10% of PImax
Outcomes	Dyspnea: BDI‐TDI (Total) Dyspnea: Borg Notes: It was evaluated under basal conditions Functional exercise capacity: 6MWD Respiratory muscle strength: PImax (FRC) Respiratory function: FEV1 (L) Functional exercise capacity: Wmax Notes: we considered 1W = 6.11 kpm/min Laboratory exercise test: VO2peak (mL/min)
Identification	Country: Chile Author's name: C. Lisboa Institution: Dept of respiratory disease, Catholic University of Chile Address: Santiago, Chile
Notes	The authors mentioned COPD in the discussion section.