Scientists have found that you can double your chances of reaching your target weight if you get between six and eight hours sleep a night.
科学家们发现，如果你每天睡6到8个小时，你达到目标体重的机会就会加倍。
If you have any more, you will become too inactive and if you have any less your stress levels will increase along with cravings for unhealthy food.
如果你睡得太多，你就会变得太懒散；如果你睡态太少，你的压力就会增加，同时也会渴望吃垃圾食品。
The research in Portland, USA, by Kaiser Permanente, a health care consortium, found that people trying to lose at least 10lb were more likely to reach their goal if they had lower stress levels and slept moderately.
一个保健协会凯撒医疗机构在波兰和美国所作的研究发现，试图减十磅的人，如果他们降低压力，适度睡觉，他们就更有可能达到目标。
Nearly 500 obese adults with an average age of 55 took part in the study.
接近500个平均年龄为55岁的肥胖成年人参加这次研究。
They were asked to attend 22 counselling sessions, reduce their diet by 500 calories a day and increase the amount of exercise they took to at least three hours a week.
要求他们参加22个咨询会，每天的饮食减少到500卡路里，每周的运动量增加到至少3小时。
They also had to keep a diary of their habits, including their sleep patterns and stress levels.
他们也要写关于他们习惯的日记，包括他们的睡眠类型和压力程度。