 [ Symptoms ] what is coreg cr taken for [ Disease ] according to a recent article many nurses go without sleep for 24 hours in order to adjust to their late night shifts not only is this ineffective it is also potentially harmful when you do not sleep for that long your sleepwake patterns end up out of sync with your biological clock this leads to a misalignment of your circadian rhythms this kind of circadian misalignment has been associated with increased risk of developing cardiovascular metabolic and gastrointestinal disorders we have a set of internal rhythms that repeat roughly every 24 hours the sleep wake cycle hunger the ebb and flow of hormones the rise and fall of body temperature and other subtle rhythms that mesh with the 24 hour solar day in fact a lot of people is sleep problems can be attributed to an internal clock that has become out of sync or mismatched with the day night cycle sometimes your body is clock just does not quite match up with society is 24 hour clock many nurses work 12 hour shifts and if a nurse works three night shifts in a row and then has a few days off that means he or she is returning to a normal sleep schedule on days off and repeating the 24 hours of no sleep preparation a few times a week nurses are not alone in the struggle to work odd hour shifts according to u s labor statistics about 20 percent of the workforce or about 19 7 million u s workers are early risers who begin work between 230 a m and 7 a m try napping if you can and if it is safe to do so and try to stick to as regular a sleep routine as possible