I've never been able to run. I mean I can run, at fast pace, but I can't jog at a steady pace for long distances. It's too boring, too much repetitive motion, too much pounding on my feet and knees. I used to bicycle, but its too dangerous now. I could probably do trail running since the pace and terrain vary.
I've added walking, crunches and pushups to my Finch App goals. So I do a 15-minute walk at about 5:30am, and 5 crunches & pushups nearly every day. The crunches are five straight up and five oblique on each side.