Supramaximal High-Intensity Interval Training in People With and Without Chronic Obstructive Pulmonary Disease

Condition(s) studied

Investigational drug(s) / intervention(s)

Exercise training on a stationary bicycle: Training is performed two to three times per week for a total of 30 sessions using a group format. Both regimens start with a five-minute warm-up and ends with a five-minute cool-down, performed at an intensity corresponding to 30% of the maximal work rate achieved during a CPET (i.e., max aerobic power \[MAP\]) with a self-selected pedalling cadence of 50-70 revolutions per minute (RPM). All exercise sessions will be held and supervised by an experienced health care professional, i.e. physiotherapists or other health professional. The different types of exercise training is described under the specific arm. Following the first 12-week training period, participants with COPD will enter a 21-month maintenance phase. They will continue to exercise using the same training modality (HIIT or MICT) as during the first 12-weeks but can select between three different settings to continue their training: "Home", "Outpatient", or "Mix" setting.

Study summary

Beyond pulmonary complications, COPD presents with extrapulmonary manifestations including reduced cognitive, cardiovascular, and muscle function. While exercise training is the cornerstone in the non-pharmacological treatment of COPD, there is a need for new exercise training methods.

The COPD-HIIT trial intend to investigate the effects and mechanisms of 12 weeks supramaximal high-intensity interval-training (HIIT) compared to moderate intensive continous training (MICT) in people with COPD and matched healthy controls on important clinical outcomes.

The trial also intends to compare the effects of 24 months of exercise training (supramaximal HIIT or MICT) to usual care in people with COPD on brain health, cardiorespiratory fitness and muscle power; in people with COPD.

Eligibility

Primary outcome measure(s)

• Change from baseline global cognitive function — Baseline, 12 weeks, 24 months
  Global cognitive function will be assessed as the Z-score determined by the combined performances on six tests from the Cambridge Neuropsychological Test Automated Battery (CANTAB) and the trail making test (TMT-A, TMT-B). The following tests from the CANTAB will be used: Motor screening task, reaction time, visual information processing, paired associates learning, spatial working memory, verbal recognition memory. The test battery takes around 60 minutes to complete. The test scores from the seven tests will be combined into a composite Z-score. The Z-score describes how much a point deviates from a mean or specific point. The Z-score represents how many standard deviations an individual's score is from the mean score of the reference population, which is represented as zero.
• Change from baseline cardiorespiratory fitness — Baseline, 12 weeks, 24 months
  Measured as maximum oxygen uptake (VO2peak \[ml O2/min/kg\]) during a standardized ramp-protocol cardiopulmonary exercise test (CPET) on a cycle ergometer. The CPET will start with a 3-minute resting phase before a 3-minute unloaded (or lowest wattage possible) warm-up phase. The aim is to have a ramp-phase of 8-12 minutes, until the participant stops due to voluntarily exhaustion, symptom-limitation or failure to maintain a cadence of 50-70 RPM.
• Change from baseline quadriceps muscle power — Baseline, 12 weeks, 24 months
  Peak power (Nm/s) assessed during a seated leg extension in a dymanometer (Biodex System 4). Participants will be instructed to extend their leg as fast and as hard as possible and then passively return the leg to the starting position.

Trial sites (2)

More Umeå University trials in Sweden

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