Our sleeping patterns determine what times of the day we feel tired and at what times we are most alert. Your job usually determines your sleeping hours on weekdays. If you work nights then you will sleep during the day and vice versa. Most of the population work between 9am and 5pm. This means that you can go to sleep when the sun goes down and wake up just after the sun rises, it is the most natural way to live. But if you do work nights then you have to sleep during the day, which feels extremely unnatural and is proven to be unhealthy. It is unhealthy because the sunlight releases certain chemicals in your body when it interacts with your skin that plays a little part in keeping you awake. Another problem is that you will be working while your friends have their social time with each other and means you cannot join in. This can make a person feel isolated and eventually depressed.

Some studies have shown that sleeping for around 8 hours is a persons optimal time to sleep. This of course does not apply to every single person as all people are different. A lot of factors can determine a persons optimal sleeping time such as age, fitness and daily tasks. However it is well documented that sleeping say even 1 hour under your optimal sleeping time can severely reduce your ability to say awake during the next day. This effect becomes worse when you consistently sleep under the required amount of hours.