High Intensity Interval Training and Technologies in COPD

Trials in COPD have shown that HIIT leads to the same positive outcomes as constant load training but causes less breathlessness and leg discomfort during training. However, HIIT protocols in existing trials have all been different and use relatively long interval durations (30 s) and short rests. This is sub-optimal because long interval durations lead to greater breathlessness and patients may fear that they will not fully recover during short rests, potentially decreasing adherence. A novel HIIT protocol involving very brief intervals (e.g. 10 s) with longer rests may provide the same benefits with less distress due to breathlessness.