The negative health effects of skimping（节省）on sleep during the week can't be reversed （扭转）by marathon weekend sleep sessions, according tonew study．
Despite complete(free) to sleep in and nap during a weekend recovery period, participants in a sleep laboratory who were limited to five hours of sleep on weekdays gained （near）three pounds over two weeks. Meanwhile, they experienced metabolic disruption（代谢紊乱）that would increase（they） risk for diabetes over the long term．While weekend recovery sleep had some benefits after a single week of(insufficiency)sleep, those gains（wipe） out when people fell right back into their same sleep-deprived（睡眠不足）schedule the next Monday.
"If there （be） benefits of catch-up（加紧弥补）sleep, they're gone when you go back to your routine. It's very short-lived. " said Kenneth Wright, director of the sleep and chronobiology laboratory at the University of Colorado at Boulder, oversaw（监督）the work．
Wright said that the study suggests people should prioritize（优先处理）sleep-cutting out the optional "sleep stealers" such as(watch)television shows or spending time on electronic devices. Even though people don't have a choice about losing sleep due child-care responsibilities or job schedules, they should think about prioritizing sleep in the same way they would do to a healthy diet or exercise.
