I moved into a city apartment after college, and I'd put on the shitty college weight. My apartment was on the 4th floor, and the stairs were right by the front door. Having a pup that demanded to go out 3+ times a day meant I was going up and down those stairs at least 5 times a day. It took weeks, at most, before that weight was gone.  Best part was the subtle shaming of my lazy neighbors that would take the elevator at the back, and I'd smirk while running up the stairs.