I think being very tired is a separate feeling, from being simply tired and being exhausted. One can be a bit very tired on Monday and a lot very tired on Friday—and still not exhausted.
I’m sometimes able to distinguish different types of feeling tired, based on what my system 1 wants me to do differently: sleep more, use specific muscles less, exercise more slowly, do less of a specific type of work, etc.
I think being very tired is a separate feeling, from being simply tired and being exhausted. One can be a bit very tired on Monday and a lot very tired on Friday—and still not exhausted.
I’m sometimes able to distinguish different types of feeling tired, based on what my system 1 wants me to do differently: sleep more, use specific muscles less, exercise more slowly, do less of a specific type of work, etc.