New research suggests that its not just food options and lifestyle choices that put night workers at higher risk for obesity and other health problems—it's that human bodies can't really adapt to a late-night rhythm.
Photo by cell105.
Roughly 15 million people in the U.S. work on "night shifts" or time-shifted schedules, according to the Centers for Disease Control, and researchers have long been concerned about their higher risks of heart disease, cancer, diabetes, and other ailments.
The short version of the findings from the Proceedings of the National Academy of Sciences is that when everyone is put on the same health and lifestyle axis, those who slip outside the normal human routine of waking at morning and sleeping at night—also known as tweaking their circadian rhythm—run up against their body's resistance, as noted by Wired:
The (night-shifted) subjects' bodies soon produced less leptin, a hormone secreted from fatty tissue that signals a body to stop eating by triggering feelings of satiety. They experienced increases in blood glucose and insulin, which are linked to diabetes. Levels of cortisol, a hormone released during periods of stress and linked to nearly every disorder in which night work has been implicated, shot up. Test subjects' blood pressure also rose.
Those findings came from test subjects who were waking up four hours later each day, though, not someone working permanently on a night schedule. So if you're working on a rotating day/night schedule, whether planned or as a result of excess overtime, it's not just your free time begging you to come back to stability—your body wouldn't mind a regular schedule either.
译文:
夜班工作干扰了你的新陈代谢
新的研究显示夜班工人不仅因为食物与生活方式不同导致肥胖及其他健康问题-而且因为人体真的不能适应午夜节律的原因。
拍照：cell105.
根据疾病控制中心报道美国大约有一千五百万人从事夜班或倒班工作，研究人员针对他们更易患心脏病、癌症、糖尿病和其他疾病的情况做了长期考察。
来自国家科学院学报的结果表明当大家在健康状况与生活方式相同时的情况下，那些脱离人类正常作息规律（即日出而作日息而睡）的人-就是通常所说的违背生理规律的人-会遭遇来自身体的阻力，正如以下报道：
受试者（夜班人员）的身体产生的瘦素很快变少，瘦素是脂肪组织分泌的激素，能让人产生过饱的感觉，从而暗示停止进食。因为瘦素产生少，受试者的血糖与所需胰岛素都增加，而这些与导致糖尿病密切相关。他们的皮质醇含量也迅速升高，皮质醇是人在紧张的过程中释放的激素，也与每一种包括夜班工作在内不规律生活方式有关。受试者的血压也同时升高。
这些研究结果来自于每天晚睡4个小时的受试者，虽然其中一些人并不总是上夜班。因此如果你工作时间黑白颠倒，不论是你计划好的，还是加班的原因，都应当恢复到稳定正常的状态，这不仅是你拥有自由时间的需要-更重要的是你的身体不会介意你作息时间规律化。.