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Some jobs require night shift work, such as hospitals or 24-hour shops. With planning, it is possible to work all night and still get eight hours of sleep in the day.
While it is possible to get used to night shift, there's evidence that some people find it much harder than others.
We usually release melatonin in the evening when we start feeling tired and ready for sleep, but when individuals work night shifts, the peak will move to daytime.
However, only 40% of people working nightshift managed to adapt, a Canadian study found. A larger study found that 40 % of people unable to adjust were diagnosed with some sleep disorder.
Research is not yet able to clarify if there are long-term effects for people who can adapt to night shifts or if there are risks for everyone working shifts.
Until we know more about exactly who is at risk, those who work at night would be wise to eat healthily, exercise, and look out for early signs of these risks.
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While we are starting to pay attention to how important sleep is, the need for dark is still mostly ignored.
Being exposed to regular patterns of light and dark regulates our circadian ...
On its own, the circadian rhythm takes almost 24 hours. Our bodies rely on the Sun to reset this cycle and keep it at 24 hours, the length of our days. Light and the dark are important signals for the cycle.
During the night, body temperature drops, metabolism slows, and the hormone melatonin rises dramatically. When the Sun comes up in the morning, melatonin has already started falling, and you wake up.
During the dark, levels of the hormone leptin (hunger control), go up. This means we do not feel hungry while low levels make us hungry.
Ans research found that sleep disruption and turning on lights lowers leptin levels which makes people hungry in the middle of the night.