A study that analysed the DNA1 of self-professed 'nights owls3' and 'morning larks5' found that people who like to rise early tend to be thinner than those who go to bed later.
通过分析“夜猫子”和“早起鸟”的DNA，研究发现：早起的人会比晚睡的人更瘦。
They are also less
prone6 to depression and less likely to suffer from
insomnia7.
Almost 90,000 people were asked if they were naturally a morning or a night person and had their DNA analysed.
This revealed 15
genes8 that were linked to a person being a '
lark4' or an '
owl2'.
A preference for mornings rose with age, with more than twice as many of over-60s describing themselves as morning types than under-30s.
Women were more likely to enjoy mornings than men, the journal Nature Communications reports.
The researchers, from the California-based
genetic9 testing company 23andMe aren't sure why a person's body clock might be so strongly linked to health.
But it might to be as simple as too many late nights taking their
toll10 on evening types.
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