There is a gym, You have to go to the suburbs. It's the grey building toward the bottom. Also manage your stamina. In abilities there is rest which will give you alot of stamina. FIghts also can leave you injured or with headaches and you need to fix that before the next battle. If you have the patreon version, In the next city over you can learn Jeet Kune Do from the woman in the mountains. There are no stats, everyone can be beaten fast but skills are what seperate you all.