oldngray
nowhere special
You won't be able to gain muscles here, as in increase the amount,# of muscles you have. Maybe you pound on a tire, or throw a curl bar like a javelin or something. If you want to tone up I guess you could run in place, like in the movie flashdance.
Running in place will help fitness but not bulk you up. STUG used to run several miles during his lunch and was extremely fit but not big.