Sorry to hear about your husband, I was diagnosed with IPF two years ago and have kept active as best as I can I exercise every day, do some chores around the house, etc. I can’t do a lot of things I used to do, like anything strenuous, or lift or carry anything that weighs a lot. The more you use the muscles especially the larger muscles the more oxygen they require. Unfortunately us with IPF/PF don’t have that luxury due to our already damaged lungs. I really believe a Pulmonary Rehabilitation class would benefit him. It teaches you a lot about our limitations and how to manage them all while staying active. They focus on exercise mainly which is a MUST while fighting this disease. Being active IS a NECESSARY EVIL of managing this disease and the symptoms that go with it. Best of luck!!!