Perenchies

This research aims to evaluate the 6-minute stepper test in adults aged 40 and older who have chronic obstructive pulmonary disease COPD or interstitial lung disease ILD. The study seeks to determine if the stepper test is valid compared to the 6-minute walk test and a maximal cardiopulmonary cycling test, whether the results are consistent when monitored directly in person or remotely via videoconferencing, and if the test is safe when performed at home with either monitoring method. Participants will attend two separate 3-hour laboratory visits where measurements like lung function and a cardiopulmonary exercise test on a cycle ergometer will be performed. They will also perform the 6-minute stepper test and the 6-minute walk test in random order with rest periods in between. Additionally, participants will have three 1-hour home visits to perform multiple stepper test trials the first with a therapist present, and the next two either with direct or remote monitoring in random order. During the study, participants health status and lung function will be monitored to ensure stability. The researchers will assess the validity and reliability of the stepper test by comparing it with other exercise tests and check for any adverse events. Participants will also provide feedback in interviews about their comfort and sense of safety while doing the stepper test. The study involves assessments over a period that may last up to two years for safety monitoring.