Reidi 2005.

Methods	Study design: RCT Study grouping: parallel‐group
Participants	Baseline characteristics Overall N (randomized/analyzed): 18/unknown Age mean (SD) in years: 65.1 (6.6) Inclusion criteria: FEV1 < 60%
Interventions	Intervention characteristics IMT: the training was performed through the Threshold set at 30 of PImax. The program consisted of 4 weeks, with 3 weekly sessions where both groups were reassessed weekly Control/sham: the training consisted of performing the threshold with or without the natural resistance of the equipment < 7 cmH2O
Outcomes	Respiratory muscle strength: PImax
Notes