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Main search terms.
| Subject | Key words |
| Pulmonary disease, chronic obstructive; lung diseases, obstructive | COPD; Chronic Obstructive Lung Disease; Chronic Obstructive Airway Disease; Chronic Airflow Obstructions |
| Exercise; aerobic-exercise; water aerobics; water sport | Water-based exercise; Water-based sports; Exercises, Aerobic; Aerobic Exercises; Aerobic training; Endurance Training; walking |
| Randomized controlled trial | Randomized; placebo |
