 Visit 4 and visit 6 will be the baseline visits for each treatment period except for dyspnea after the 3-min constant rate shuttle walking test which will be determined at Visit 3. Participants will perform spirometry, lung volume measurements before and 1h 20 min after receiving the study medication. Two 3-min constant rate shuttle walking tests will be performed 2h 25 min after dosing, starting with the one performed and completed at the highest speed at V3. This time schedule was chosen based on previous studies in this field. Dyspnea will be assessed with the baseline dyspnea index BDI and health status will be evaluated by the COPD Assessment Test CAT. 