Being a morning person may actually be good for our health, too. When UK researchers questioned adults about their sleep habits, they found people who stay under the covers on the weekdays until 9 AM are more likely to be stressed, overweight, and depressed than those who get up at 7 AM. Another study found teenagers who went to bed and woke up late were less inclined to hit the gym and more likely to be overweight than those who went to bed and woke up early. Talk about waking up on the wrong side of the bed. (Again, remember it’s not clear that waking up early causes stress, depression, or weight gain.)

而且，做一个早起的人确实也有益于身体健康。当英国的研究人员调查成年人的睡眠习惯时，他们发现，工作日赖床赖到9:00的人，比那些7:00就起床的人更容易增加体重、感到沮丧有压力。另有调查发现，较之于早睡早起型，那些晚睡晚起的年轻人不太会去健身运动，自然也就更容易发胖。这正是起不了床又毁了一天的情绪。（当然，早起是否会导致压力、抑郁或体重加剧，依然不甚明确。）