The blue light that your phone, laptop, and TV affect your circadian rhythm, tricking your brain into thinking it's still daytime. This reduces hormones like melatonin, which help you relax and get deep sleep. It's recommended that you stop using electronics at least an hour before bed.

研究发现，“肥肉”长在哪里和我们的睡眠时长息息相关，相比每日睡够7-9小时的人，每天睡眠时间不足7小时的人躯干、手臂、腿部都更胖。而这种缺觉带来的影响还与性别有关，对于肥胖群体，影响则更明显。

手机、笔记本电脑和电视发出的蓝光会影响你的昼夜节律，让你的大脑误以为还是白天。同时，蓝光的刺激会使褪黑激素等帮助你放松和进入深度睡眠的激素减少。所以，建议至少在睡前一小时就放下电子产品。

Compared to the reference group, short sleepers and increased trunk FMI, arms FMI, legs FMI were significantly correlated in men. However, in women, short sleep duration was only associated with elevated arms FMI. Furthermore, in the obese group, short sleepers had higher arms and legs FMI compared to normal sleepers.

大家可能已经听过很多长期睡眠不足带来的危害，比如免疫功能失调（immune dysfunction）、生物钟紊乱（chronobiology disorder）等等。不过有一点你可能没想到，缺觉甚至会影响身体脂肪的分布。近日，一项研究表明，睡眠不足的人，大腿和胳膊会变得更粗。

文章来源：《辞书研究》 网址: http://www.cishuyanjiu.cn/zonghexinwen/2022/0904/641.html