Sleep is essential for our existence; it is the state of natural rest to re-energize the body. During sleep the body regains much needed strength, and relieves the tiredness brought about by daily activities. A third of a person’s life is spent sleeping in bed which is why it is important to have a comfortable bed to rest on. Many people are not aware that they are sleeping in uncomfortable beds. This is evident why some parts of your body ache after a long sleep. You may also feel restless no matter how long you sleep.