Hmm, lately I began to change their timezone always to daylight (whenever they begin their night I change it to day), then all my tired/exhausted peeps take naps in turns and recover themselves enough to do their daily chores. During the day, they go and take a nap themselves whenever they feel tired, and even sometimes when they're close to being tired (yes I did praise them for taking naps). This seems to work, but of course, their energy level is never more than half.

I tested in several different ways (day, night, same and different peeps, different games, etc), but napping restores much more energy than sleeping (when the game is open). Whenever I send someone tired to sleep, he/she usually wakes up tired, but napping does give a significiant amount of energy; only two doses of nap can rise an exhausted member to a half energy bar. Does this also happen to you? and isn't this a little weird?