I am regardful of this other question on decompression but herein, I'm asking about a longer period of repose (to distinguish it from the aforesaid "break") based on empirical, scientific evidence.
For example, the mathematician John Littlewood wrote that he would take Sunday off every week.
Should reposes be taken? Or do short breaks suffice; is it productive to work everyday, as long as you break as according to the linked question above ?
If so, how long should each repose last?
If so, how often should reposes be taken?