Burnt out, Tired, No Energy in short fatigues and you do not know why? Well modern sleep research may provide a clue to why so many people feel tired all the time in what experts claim is an epidemic of fatigue across the modern world.
Many people simply think the amount we sleep is all that matters and catching up on missed sleep will solve any tiredness problems that arise in their life.
While this is partially true that missing sleep is a problem and catching up can help somewhat it does not address the true functions and systems of sleep that are inbuilt into our bodies.
The reason that we feel tired, no energy and so forth when we miss sleep is not so much that we miss out on our full standard eight hours of sleep a night but instead that we wake up at the wrong time or that we go to bed at the wrong time.
This can be explained with these two important factors of good sleep.

• Sleep Windows - Our brains have a good idea of when we need to rest to regain energy and do other processes that can only be done effectively while asleep.
  When it is time to sleep we start to feel tired, no energy is being added to our bodies because it is on a downwards slope towards sleep.
  If we obey these signals we can get to sleep very quickly and easily giving more time to our bodies to rest.
  However if we ignore this urge despite being tired we can fight through it making our brains wake up again and start working.
  When this happens you miss your sleep window and if you go to bed when your brain is not ready you often cannot sleep properly for a long time and you are forcing your body to act unnaturally.
  Messing with your sleep window can mean you will feel tired with no energy because you will not get to sleep quickly and it messes with many bodily systems.
  
• Sleep Cycles - The other vital part to sleeping is our sleep cycle.
  This is a period of time where our brain and body wind down further and further until we enter our deepest sleep time which is a period the body desperately needs for health and memory it has been found.
  Once it has done this, the brain starts to fire up some more entering a lighter sleep and if we do not wake the cycle starts again.
  Most peoples sleep cycle lasts about four hours giving the average nights rest approximately eight hours (two cycles).
  This however can vary with some people having 3 hour cycle others 5 and so on.
  If you wake when you are in a deep sleep you will feel groggy like trying to start a car when it is very cold and this can last the whole day.
  Repeated exposure to this kind of activity can mess up your sleep cycles and sleep windows and send you into a period of fatigue that need leaves you tired, no energy to do the things you need to do and must be countered and fixed for better health