Morning Light Exposure Tied to Lower Weight
Light might make you a light weight—in a good way.
It's been known that bright light in the morning(Cock Crow) can reduce appetite and body weight.
But that fact did not prove that light has a direct effect on weight.
Early morning exposure to light could just be a marker for a regular sleep cycle, which is also associated with a healthy body weight.
The question was thus whether light exposure was associated with weight regardless of sleep patterns.
To find out, researchers had 54 adults record their diet and sleep for a week.
The subjects also wore sensors that monitored the timing and intensity of their light exposure.
And independent of sleep habits, the participants' body weight corresponded to when they saw the light,
... even dim light, with just half the intensity of sunlight on a cloudy day.
The study is in the journal PLOS ONE.
So early to bed and early to rise appears to indeed make you healthy.
Jury's still out on whether it also makes you wealthy and wise.
...Jury is still out不是指陪审团还在外面，而是指一个问题还没有结论，举例： 一个公司总裁为了一点小事把财务总管解雇。董事会说：Well, the jury is still out if that's the right way to handle it, - 意思是：这么处理是否合适现在还没有结论。 一个学生买了一辆很便宜的旧车。他对同学说：The jury is still out if it'll keep going, - 这车能不能持久还不清楚。
本文节选自《60-Second Science American》
