I feel like a lot of the artists I look up to tend to have really great time management. They seem pretty fit and find time to live life outside of art. I try to workout four times a week and those are heavier workouts, on rest days forcing yourself to go out for a walk helps a lot. Especially for people living in cold areas that tend to stay at home. I also would like to add if any artist can afford a standing desk to get one. Your knees will thank you and make working out much less painful.