If you're the type who snoozes your alarm every morning or can't function before (or even after) your morning coffee, there may be genetic reasons for that.
New research by a DNA testing company, 23andMe, has found that genetic programming plays a role in our wake time.
The study studied more than 1,500 Britons to determine that 7.55 am is the average genetic wake-up time in the UK.
This means that the average British person will wake up naturally before 8 am every day.
Many people set their alarms much earlier than that, due to our feeling of fatigue and lack of productivity.
Interrupting your body's circadian rhythm (which is the official term for our body clock) can make us feel uncomfortable at the beginning of the day.
If you don't feel tired the first thing, it does not mean you are immune to these feelings. Many people experience lethargy at different points in a day.
The NHS has found that one in five of us is "extremely tired" and has suggested a number of good ways to wake yourself up when a slump occurs.
Exercise is cited as one of the main ways to increase your energy reserves. In addition to the psychological benefits of exercise, it also reduces the risk of premature death by 30%.
Reducing caffeine is another recommended way to deal with fatigue. As tea drinkers, we all risk being overly stimulated by the influence of caffeine. Switching to decaf tea and coffee can make a difference.
Getting into a nap routine can also disrupt your body's circadian rhythm. If you go to sleep every time you feel tired, you might find it difficult to sleep at night, the NHS says.
-This article first appeared on Yahoo