Effectiveness of high-intensity inspiratory muscle training, and resistance and aerobic exercise for cardiovascular health in chronic obstructive pulmonary disease (HIRAC-COPD): a randomized controlled trial protocol

Table 1 Overview of training parameters of the three trial arms

	H-IMT	Aerobic Training	Resistance Training
Bundle arm	• Tapered flow resistance device • 50% MIP • 10 × 3, 1-minute interval • 2 times/week • 5% MIP increment per week	• Ergometer • Borg 4–6/10 • 20 min • Consistent training including 2-minute warm-up and 2-minute cool-down • 2 times/week • Workload progression according to Borg scale (4–6/10)	• Elastic band, free body weight • Upper extremities: arm vertical extension, arm horizontal extension • Lower extremities: half-squat • 60% 1-RM • 10 × 4, 1-minute interval • 2 times/week • Re-assessment of 1-RM at 4th week for progression
H-IMT arm	• Tapered flow resistance device • 50% MIP • 10 × 3, 1-minute interval • 2 times/week • 5% MIP increment per week	None	None
Control arm	None	None	None

H-IMT, high-intensity inspiratory muscle training; MIP, maximal inspiratory pressure; RM, repetition maximum

ISSN: 1471-2466