ObjectiveEvaluate the interaction between high-intensity inspiratory muscle training
(IMT) and aerobic exercise on physical capacity, respiratory muscle
strength, peripheral muscle strength, and quality of life of patients who
underwent coronary artery bypass grafting (CABG).MethodsTwenty-four patients underwent CABG were randomized into two groups. During
36 sessions, one group received IMT associated with aerobic exercise and the
other group received only aerobic exercise. Primary outcome was the distance
in the six-minute walk distance (6MWD) test. Secondary outcomes included
respiratory muscle strength, peripheral muscle strength, and quality of
life. Measures were taken at the baseline, at the 12th session,
the 24th session, and 36th session.ResultsBaseline characteristics were similar between the groups. There was no
statistically significant difference between the two groups in any outcome
[6MWD - P=0.935; peak oxygen consumption
(PeakVO2) - P=0.853; maximal inspiratory
pressure (MIP) - P=0.243; maximal expiratory pressure (MEP)
- P=0.268; sitting-rising test (SRT) -
P=0.212], but there was interaction in MIP
(P=0.000) and all outcomes improved in the two groups
(6MWD - P=0.000; PeakVO2 -
P=0.000; MIP - P=0.000; MEP -
P=0.000; SRT - P=0.000).ConclusionThere was an improvement of all outcomes in both groups, but IMT was not able
to provide additional benefits. The use of this combination should be used
with caution to not generate higher costs in the rehabilitation process of
these patients.