Why you need to have different outlets for achievement, just as you need multiple outlets for creative expression.

You cannot get reward from the same source only all the time. In this case this will be regarded by your mind as a situation where you’re stuck between not wanting to rest and also not being able to get any kind of reward that you can get from achieving something. This is because you’re unable to get any more reward from the same source of reward that you’re trying to get further reward from at the moment, regardless of why this is the case. Regardless of why you can’t extract any further amount of reward from that same type of activity. This still doesn’t exclude the possibility that you still need to get further reward from achieving a certain outcome, you still need to achieve something, anything. The only difference here is that you can no longer try to satisfy that hunger for achievement through the same channel. You still need to achieve. You just need to achieve something totally different this time, a whole different type of achievement, or activity, because you can no longer extract any more reward from the same type of achievement or activity that you’ve recently got reward from or because of.

In this case, it is safe to assume that you’re not currently struggling because of too much fatigue. It is because you’re stuck in a zone where you cannot rest now because you’re dissatisfied with your performance, although you’ve achieved a lot in a certain area to the extent that it doesn’t make any sense to try to reach a higher outcome in this particular realm at the moment, but you cannot accomplish anything new now in order to satisfy that achievement hunger you still have, because you insist upon getting that need met through doing more of the same thing or type of achievement, and that is becoming increasingly more difficult in this case, because you cannot terminate the cycle of working toward a certain goal or outcome without getting any reward from it, the entirety of the accomplishment cycle will not even begin if you cannot obtain any reward from it when you complete it, because for some neurological reason, your brain fails to get further reward from achieving more in the same type or category of accomplishment that it already thinks it has accomplished more than enough in it for now.

So you end up unable to make any further achievement in this case, and unable to rest as well.

The only way out of this is to seek further achievement elsewhere or by doing a whole different thing, activity, or type of accomplishment.

You need to establish several channels for satisfying your need for achievement, not take longer breaks to recover.