New Research shows serious neurological consequences of burnout.
The more stressed you are, the harder it is to deal with stressors in the future. Once we get into an exhaustion phase, our brain finds it less and less able to cope with ongoing stressors. And this is whether we are aware of this process, or not!
This biological stress model was originally developed by Dr. Hans Selye, endorcinologist. He demonstrated that we can resist stress only for so long before our body/brain go into an exhaustion phase that depletes us of our reserves.