I do think this situation can be a possibility to broaden our horizons especially with footwork drills and shadow boxing. I am talking about recreational training were most love to cut these drills short.
Well and there is the great possibility to build up your gas tank.
Not only go running but think it through what you train while running. I do prefer polarised training approach but there are several legit ways. In short do very slow long runs for aerobic cardio and then short anaerobic high power runs / intervalls to boost anaerobic tolerance. You want more upper body involvement go trail running with poles.
Sure you should not live in a city for that.
Were do you live? In a favela in Rio de Janeiro?