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Interval versus continuous training in lung transplant candidates: a randomized trial
Rainer Gloeckl1, Martin Halle, Klaus Kenn
1Department of Respiratory Medicine & Sports Therapy, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany. rainer.gloeckl@gmx.de
Summary
Interval training (IT) offers similar exercise capacity gains as continuous training (CT) for end-stage COPD patients. IT also reduces dyspnea and exercise interruptions, making it a potentially superior option for this population.
Area of Science:
- Pulmonary Rehabilitation
- Exercise Physiology
- Respiratory Medicine
Background:
- Interval training (IT) and continuous training (CT) are established for moderate-to-severe COPD.
- Their efficacy and feasibility in end-stage COPD patients are not well-defined.
Purpose of the Study:
- To compare the effects of IT versus CT on exercise capacity and dyspnea in end-stage COPD patients awaiting lung transplantation.
- To assess the feasibility of IT and CT in this patient group.
Main Methods:
- Sixty end-stage COPD patients (mean FEV(1) 25% predicted) were randomized to a 3-week inpatient program of IT (cycling 100% peak work rate, 30s on/30s off) or CT (cycling 60% peak work rate).
- Both protocols involved equivalent total work.
- Patients were evaluated for lung transplantation.
Main Results:
- Both IT and CT groups showed similar improvements in 6-minute walking distance (approx. 35 meters).
- Interval training resulted in significantly lower perceived dyspnea (Borg scale) and fewer unintended exercise breaks compared to continuous training.
- No significant changes in lung function parameters were observed.
Conclusions:
- Interval training is a viable and potentially advantageous exercise modality for pre-lung transplant COPD patients.
- IT leads to comparable improvements in exercise capacity as CT but with reduced dyspnea and better adherence.
- Further research may support IT as a preferred rehabilitation strategy for severe COPD.
