Yes, even though most of us at my hospital do it, it is exhausting! I dont really mind four days, but the five is very tiring. I just dont know how the rn's I work with do it! Many of them are over 40, not that it is old, and work five twelve hour days and only two days per week off, and usually not even two days off in a row!! One rn worked six days and when they started putting her on call she went prn somewhere else to keep up that six 12 hr per week . I am really considering telling boss that I would like to work three one week and then four the next. If we dont tell him, he automatically schedules us for five each week!!