After you reach your desired goal in terms of look, feel and numbers. It's time to keep the achievement tuned and take yourselves to even higher levels but not so consciously. By continuing working out regularly we definitely keep on training body but not just for change but to embed the changes to deeper levels of consciousness like may be subconscious level. For example when we workout for a while (about 2 years) and eat properly our body automatically signals us of any kind of atrophy or over indulgence. We need not push ourselves to go to gym. Think about it. Do you push yourself to brush your teeth, take shower etc? You might skip may be once in a while, but not to the extent that you start hurting your teeth or skin right.
The point is that the workout should slowly become part of your daily activities and then become part of your nature call system. The theory of evolution hints about hardwiring good traits in us to survive. It has been benefiting us: think about vision, while a baby can see right from the moment he is born, we don't have computer vision close to vision of even an ant. Today's state-of-the-art learning machines cannot even be compared to a human baby. It's hard to compete with evolution but if we work hard (and survive long) we can synergize with it and benefit from it.
Here's the conclusion of this health post. Workout so regularly that you imprint the mechanisms into your DNA and hence contribute towards better evolution of future generations in terms maintaining better health. You don't have to complain of not having facilities to workout. Workout with whatever you got, just a simple skipping rope, or stairs, or walking roads should be able to serve the purpose of keeping you fit. Don't you sleep whenever wherever if you need to, automatically. Don't you find something to eat whenever wherever if you are hungry. Don't you clean your mouth (brush) whenever wherever if your breath smells bad. The point is push the act of workout to those basic levels of conscious that you keep yourself fit even without much concern and stand as an inspiration for many to change. So as popular advise goes, move from being inconscious-incompetent, to conscious-incompetent, to conscious-competent and finally to inconscious-competent.
Link to previous health post.