Machines are man made as they were designed to comfort human beings and decreases the time usage but machines also need some rest .

Similarly this is the case with humans we also want rest . God has made day for work and night for sleep .

As sleeping on time makes you healthy but lack of sleep can cause so many reasons to make you unwell and sick . A good sleep is the basic need to led a healthy life . A famous proverb

" early to bed early to rise makes a man healthy wealthy and wise"

Also denotes that how much sleep is necessary for human beings.

A soft matress that helps to fit your back bone can give you good sleep . Or sleeping on floor also gives your body a shape and makes you strong .

Time duration

You have to sleep 7 to 8 hours daily for good mental health

Side effects

Not sleeping properly can causes many diseases like its can also causes hallucinations , sometimes more hard than this .