If a person decides to work a mentally demanding job, giving their all to it, and makes themselves exhausted every day, what can they do to prevent/alleviate the feelings of exhaustion which plague them throughout the week and weekend?
I'm not asking about physically demanding jobs (e.g. manually digging holes all day) although the job in question rarely involves sitting down. I think it is mental overload manifesting itself as exhaustion. I'm talking about a job where you work an 8 or 9 hour shift without a break, no quiet moments, always maintaining high concentration.
I'm guessing the main solution might be sleeping for as many hours as possible, since that is what the body appears to be suggesting! But maybe there are other nutritional/medical/psychological tactics that can reduce the level of misery slightly? Or make the body more able to cope with this assault?
I know the problem is a mental one, but what can be done to the human body to reduce the magnitude of the inevitable outcomes, or to return to 'normal' faster?