Ontology highlight
ABSTRACT: Objective
To explore reasons for the lack of efficacy of a high intensity aerobic exercise program in post-polio syndrome (PPS) on cardiorespiratory fitness by evaluating adherence to the training program and effects on muscle function.Design
A process evaluation using data from an RCT.Patients
Forty-four severely fatigued individuals with PPS were randomized to exercise therapy (n = 22) or usual care (n = 22).Methods
Participants in the exercise group were instructed to exercise 3 times weekly for 4 months on a bicycle ergometer (60-70% heart rate reserve).Results
The attendance rate was high (median 89%). None of the participants trained within the target heart rate range during >75% of the designated time. Instead, participants exercised at lower intensities, though still around the anaerobic threshold (AT) most of the time. Muscle function did not improve in the exercise group.Conclusion
Our results suggest that severely fatigued individuals with PPS cannot adhere to a high intensity aerobic exercise program on a cycle ergometer. Despite exercise intensities around the AT, lower extremity muscle function nor cardiorespiratory fitness improved. Improving the aerobic capacity in PPS is difficult through exercise primarily focusing on the lower extremities, and may require a more individualized approach, including the use of other large muscle groups instead.Trial registration
Netherlands National Trial Register NTR1371.
SUBMITTER: Voorn EL
PROVIDER: S-EPMC4946776 | biostudies-literature | 2016
REPOSITORIES: biostudies-literature
Voorn Eric L EL Koopman Fieke S FS Brehm Merel A MA Beelen Anita A de Haan Arnold A Gerrits Karin H L KH Nollet Frans F
PloS one 20160715 7
<h4>Objective</h4>To explore reasons for the lack of efficacy of a high intensity aerobic exercise program in post-polio syndrome (PPS) on cardiorespiratory fitness by evaluating adherence to the training program and effects on muscle function.<h4>Design</h4>A process evaluation using data from an RCT.<h4>Patients</h4>Forty-four severely fatigued individuals with PPS were randomized to exercise therapy (n = 22) or usual care (n = 22).<h4>Methods</h4>Participants in the exercise group were instru ...[more]