Burnouts come in various forms and one of the symptoms is exhaustion. As another comment already stated a person has a limited amount of energy that can be spen

Burnouts come in various forms and one of the symptoms is exhaustion. As another comment already stated a person has a limited amount of energy that can be spent. Working at more than 100% it's possible but consumes a lot of energy. One of the sources of this energy can be excitement (adrenaline) because you intrinsically like what you are doing or because you get a sense of ffulfillment in completing things. Which brings us back to the antidote suggested by the post. The suggested actions are typical measures for improving one's self-esteem. When one's self-esteem is low one tends to suffer from the same symptoms as exhaustion. The post suggests that burnout is caused by repeated failure of obtaining success after spending a serious amount of effort and commitment. This however is a classic example of something that induces low self-esteem. So be sure that you are not primarily fueled by this need for success when working over your max. Because if that is what is giving you energy you will lose it once you have some failures.