You can only learn and engage so much in a day. In my head, it can be healthy to shift from tiring yourself out via work to tiring yourself out at home. You're

You can only learn and engage so much in a day. In my head, it can be healthy to shift from tiring yourself out via work to tiring yourself out at home. You're not sandbagging them, you're setting boundaries on how much you're willing to do. If this is a problem for the employer, they can act accordingly.