ISRCTN19258620.

Methods	Study design: RCT Study grouping: parallel‐group
Participants	Baseline characteristics Inclusion criteria 80 non‐hypercapnic patients with moderate (FEV < 40%) recruited from consultant hospital and community chest clinics All patients will be receiving optimum medical management and will have been stable for at least 4 weeks prior to their initial assessment Exclusion criteria Hypercapnia (PaCO2 > 45 mmHg) Any patient who is unsuitable for magnetic stimulation (pacemakers, artificial heart valves, metal prosthesis)
Interventions	IMT: using Powerbreathe device
Outcomes	Dyspnea: Borg Functional exercise capacity: SWT Respiratory muscle strength: PImax Respiratory muscle endurance pressure: Pthmax Respiratory muscle endurance time: Tlim
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