The Effect of Interval Exercise on Functional Outcomes in Veterans With COPD and OSA

  • End date
    Apr 1, 2026
  • participants needed
  • sponsor
    VA Office of Research and Development
Updated on 10 May 2022


The term "Overlap Syndrome" (OS) is used to describe the presence of both chronic obstructive pulmonary disease (COPD) and obstructive sleep apnea (OSA) in a single patient. Due to premature aging, patients with OS are prone to developing functional decline up to 20 years earlier than the general population. The International Classification of Functioning, Disability and Health (ICF) evaluates functional status in chronic pulmonary disease globally in 5 domains. The investigators propose to study validated outcomes in 3 of these domains: 1) participation in life situations; 2) physical activity; and 3) cardiovascular health. The investigators long-term goal is to develop an exercise strategy tailored to Veterans with OS which will reduce the risk of functional decline through increased PA.


The term "Overlap Syndrome" (OS) is used to describe the presence of both chronic obstructive pulmonary disease (COPD) and obstructive sleep apnea (OSA) in a single patient. Veterans with OS who also have excessive daytime sleepiness (EDS-OS) are at highest risk for functional decline yet have the greatest barriers to exercise training. Thus, there is a critical need to identify novel exercise strategies that meet the individual needs and capacities of Veterans with EDS-OS. The investigators propose to test moderate intensity interval training (MIIT), a novel exercise intervention whose translation into durable lifestyle change may be facilitated by the feasibility of short bouts of increased PA. The investigators proposal addresses key knowledge gaps in rehabilitation research by investigating the clinical phenotype of EDS-OS to determine the association with functional outcomes and response to a novel exercise intervention with the goal to reduce functional decline.

Condition COPD, OSA
Treatment Exercise
Clinical Study IdentifierNCT05254431
SponsorVA Office of Research and Development
Last Modified on10 May 2022


Yes No Not Sure

Inclusion Criteria

Diagnosis of COPD and OSA, i.e., Overlap Syndrome Diagnosis of Overlap Syndrome (both COPD and OSA), confirmed in CPRS from spirometry or pulmonary function test of FEV1/FVC <70 for COPD and a polysomnogram or home-based study for OSA
Montreal Cognitive Assessment (MoCA) >20

Exclusion Criteria

CAD, as defined by anyone of the following: history of CABG, prior positive stress test for ischemia, infarction or angina or medical problem
Orthopedic problems as defined by joint pain limiting ambulation
Fall risk, defined as more than 2 falls in the prior month
Hospitalization in prior month
Daytime home oxygen 6. Participation in structured exercise, defined by the Physical Activity Scale for the Elderly (PASE) as more than 1 hour of activity spent in moderate activity and any strenuous activity performed over prior 7 days
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