homeostage is a technical term used to define that period enoght of time sufficient that a worker from differents (and or dangerous) class of job necessit to fit himself fisiology to restart a new day (or week, or month, or year) working. It deppends about law in each countries (perdoem meu péssimo inglês) and each kind of job. ex: while you are reading this, your eyes are getting tired then, you must take a rest for any time to repair it. Some countries has important laws to protect their workers (not China).