High- vs low-intensity inspiratory muscle interval training in patients with COPD.
This study determined the effect of a high vs low resistive inspiratory muscle interval training protocol on inspiratory muscle strength (PImax), incremental inspiratory threshold loading (Pitl), inspiratory muscle endurance (IE), and 12-minute distance test (12 MD) in severely impaired patients with COPD. We used a double-blind, two-group, repeated-measure design. Group 1 (n = 12) received supervised high resistive loading at approximately 52 percent PImax and group 2 (n = 8) received supervised low resistive loading at approximately 22 percent PImax. All subjects trained three times weekly (progressing from 5 min per session in week 1 to 18 min per session in week 12) for 12 weeks. After three practice sessions, measures of PImax, Pitl, IE, and 12 MD were taken at baseline, at 4-week intervals, and within 72 h of completing the protocol. Group 1 showed significant improvement in all four dependent variables while group 2 improved in Pitl, IE, and 12 MD. The results suggest there is no significant difference between high and low resistive interval training in more severely impaired patients with COPD.
Preusser
B A
BA
College of Nursing, Ohio State University, Columbus.
Winningham
M L
ML
Clanton
T L
TL
D000368:Aged; D000369:Aged, 80 and over; D004311:Double-Blind Method; D005081:Exercise Therapy; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D007320:Inspiratory Capacity; D008173:Lung Diseases, Obstructive / Q000503:physiopathology / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D012132:Respiratory Muscles / Q000503:physiopathology*; D012138:Respiratory Therapy; D014109:Total Lung Capacity