I'm one for working all the time. I like to work, and enjoy it. When not working, I like to pursue hobbies and activities that also lead to accomplishments. Maybe some of the readers here will have a similar attitude towards spending their time.
Occasionally -- rarely -- I take a day off and just intentionally do nothing but relax. Every time I do, I'm reminded that my default way is not actually conducive to the things I want the most. Taking 2-3 days off at the beach every couple months doing simply nothing can lead to such a higher clarify of mind.Likewise, even just a day with no appointments nor self-imposed obligations can be incredibly refreshing.
If you're sleep-deprived, especially if you're averaging under 6 hours per night, the results of relaxation can be even greater. I slept 15 hours today, spent a little time with my family relaxing, eating slowly, and having a coffee, and then took a long walk through the night air listening to a biography of Napoleon on audiobook.
It was magnificent. Maybe those old scriptural tales about prohibitions from working once per week were on to something -- the societies that they originated them went on to thrive, excel, and endure, and perhaps that's not an accident? Maybe you'd benefit from breaking a day off from all obligations, especially if you haven't done so in a while.