18 hours does not work. But 10-11 is ok, as long as it is not 5 days per week. The trick is to have a long pause in the middle, like 1 hour for lunch and small walk (perhaps to a nice restaurant nearby).
This is how it works in Moscow. A person comes to work at 9, has a long lunch/pause from 2 to 3 and then leave at 8. As an added bonus late in the evening traffic jams are reduced and the underground is no longer overcrowded so it is faster to get home.
This is how it works in Moscow. A person comes to work at 9, has a long lunch/pause from 2 to 3 and then leave at 8. As an added bonus late in the evening traffic jams are reduced and the underground is no longer overcrowded so it is faster to get home.