Why People Need to Rest 8 Hours A Day?

before i could sleep like 10 hours daily and still wasnt rest and fresh. right now i can sleep even 4 hours if someone wants sth from i have no problem to ignore my desire to sleep, or not to sleep 24h, once not seldom. and short sleep doesnt make me feel sleepy on contrary i feel much better and lighter. i wish i could make myself to wake up 7 in the morning, but i am too lazy to do it.

I think this question can be tackle with age breakdown. Kids need to have more than 8 hours a day. 8 hours is adequate for teenage. Adults needs only about 6 hours a day. Old people needs only to have 4 hours of sleep. Sometimes resting your eyes will enable you to stay alert for longer hours. I have heard that it's our eyes that use up 1/4 of our energy.

I don't think that everyone needs 8 hours and I certainly don;t get that much rest, though I might feel better if I did. I work best at about 6 hours rest but average less than that. The effects for me are usually being tired during the day and a feeling of burn-out

its different for every individual but the average worldwide is considered to be 8 hrs less sleeping hrs for longer period can result to depression and frustration,lack of attention at work & a decline in health ultimately there can be a permanent loss of sleep coz of damaged n burnt nerve cells due to lack of sleep