8–12-year-old patients with new referral for asthma and on no asthma treatment presenting with uncontrolled symptoms
Duration: 7 weeks
Significant improvements in IMRT versus control seen in MIP (∆MIP = 62 cmH20 [IMRT group] vs. 0 cmH20 [control group]; < 0.0001), MEP (∆MEP = 31 cmH20 [IMRT group] vs. 0 cmH20 [control group]), and PEF; daytime and nocturnal symptoms, activity limitation, and asthma attacks
N = 50 (34 females, 16 males)
Frequency: 2 x/week Intensity: 40% MIP
IMRT effects on MIP, MEP, and PEF were generally durable after 7 weeks off IMRT
Volume: 50 min sessions
No differences between groups in emergency room treatment and hospitalization
Type: inspiratory pressure threshold resistance
Equipment: respironics threshold IMT
(Control intervention: education without IMRT; all participants started monthly visits and asthma education; participants could be started on ICS or ICS/LABA and adjusted monthly)