SSS 2011-12-28（在线收听）

 This is scientific American's 60 seconds science.I'm Sophie Bushwick.Got a minute? For shift workers odd hours usually mean strange sleeping habits and unhealthy meals.And now an editorial in the journal Public Library of Science Medicine takes the position-that unhealthy eating associated with unusual hours could be considered a new form of occupational hazard.Because such eating is a risk factor for obesity and diabetes. More than 15% of workers in U.S are employed in shifts, with workers taking over for each other so that the establishment can stay open for up to 24 hours a day.Because some shifts take place at night,employees have their ?? rhythms disrupted and thus their metabolisms.Taking round the clock shifts  also makes eating a good diet and getting sufficient exercise difficult.A recent study in the same journal found an increase in diabetes risk among nurses who perform shift work.The editorial suggests not only employee incentives but also legislation to make healthful diets easy and cheap.It concludes that treating poor eating among shift workers as an occupational hazard is consistent with the history of work place safety rights