Hi has anyone tried the Airofit Pro for respiratory muscle training I have a number of other pieces of equipment that are less tech and was wondering if anyone can share their experience with this. I got COVID in Jan 2021 and live at 7200 ft and need supplemental oxygen when I am at home and am unable to participate in the sports I love. At sea level I am able to walk bike play golf etc without the oxygen back up. Next month I am scheduled to have a CT scan to see if my pulmonary fibrosis is progressive. Would appreciate any advice or knowledge with regard to this.