When I am driving around in Los Angeles I often see joggers amidst city traffic. I mean, right in traffic. Breathing emissions straight from the exhaust pipe and thinking you're doing something healthy for yourself is stupid enough, but running with your leg in a brace? I have seen that too, a dozen times or more.
My Grandma used to say "There are only two kinds of people in this world: those who are smart enough to know how stupid they are, and those who are too stupid to know how stupid they are."
The majority of people are walking around right now with multiple things wrong with them, all fixable. You don't run after sustaining a leg injury: you rest and heal. If your past problems have so hijacked your present life that you taint everything and everyone you touch, you need to see a therapist to rid yourself of the demons and destructive behavior. Of course, few people ever do this, opting instead to spread their venom wherever they go, making themselves and everyone they "love" pay dearly for what some other person did to them long ago.
Whether it's problematic teeth or gums, a bad back, painful knee, obesity, smoking, junk food...whatever is dragging you down is fixable once you decide to fix it. So, decide. Living with and exacerbating pain or diminished capacity intentionally is insane.
We have just one shot on this earth. Why do so many people throw it all away?