I suffered a really bad broken left leg in 2003, right before wife and I were set to go on a cruise. Spiral fracture of left tibia, broken fibula, three surgeries, lots of hardware. In a long leg cost from December through May, 2004. In 2004, during second surgery doctors had to re-break leg to straighten it before placing steel plate with six screws on tibia. When the doctors finally removed my long leg cast, my left calf was about the size of my forearm by May, 2004.
Never a fan of running before that. Wife got me a stationary bike, rode that for about three months. Started going to the gym, on treadmill walking for 20 minutes, then walking and jogging for 30 minutes, then jogging for 30 minutes, then jogging for 45 minutes. In 2005, decided to run outdoors instead and loved it. San Fernando Valley used to be clean and I would run in a park across the street, Balboa Park. Ran at night, when quiet. Ran more and more, did 6 miles, 3x per week, then 7 miles, 3x per week. I would run a half-marathon once per month just because. I was mid-40's at the time. Started going longer distances, ran a marathon in 2008.
Not something I bring up much, but I was blessed with wonderful Type 1 diabetes in 1968 as a little kid. You know, the wonderful type that requires multiple injections per day to stay alive, that results in blood sugars being a goddamn roller coaster? So back then - before the Libre glucose monitoring and the incredible advances over the past 10 years in measuring and maintaining blood sugars - I would measure, figure out what glucose I needed, and go run. I was running 25 miles per week with a ****-ton of hardware in my left leg, blood sugars that I had to monitor more closely than So0p checking out bikini videos, and a million excuses why not to run.
Everything Donkey and Steeler4evr are saying about just getting past the mental block is true. Stop making excuses. Stop finding a reason not to run, or walk, or lift, or do something. Just stop whining about your life - get off your *** and do something to fix it.