@jc76 You will get there! I was jogging and then after a sore knee, have been walking since I was in my 30's. I added the gym when I retired in 2012. With the various complications I experienced (not from the ICD), I had to start and progress slowly three times. It was not fun and during the 3rd time I wondered if I had the mental stamina to do it again. The ability to bike ride with my grandson made it all worth it. People often start by walking around the block just once doing it 3 times a day, riding a recumbent bike slowly, etc. @jackiet at 90 YOU are an inspiration!