We love to believe our bodies can do far more than they really can. So, we push them, and then they fight back.
Instead of pretending you don’t have issues with your back, or that you need to eat something, or that you can still stay up all night, be honest.
Recognize your limitations. They are not bad things, limitations. They are your body’s way of saying “Enough!” Respect your body’s wishes and set your expectations to reality.