How much sleep do you need?
As you get older, you need less sleep – from about 16 hours a day as a baby, to less than 7 hours when you are over the age of 60. What happens if you go without sleep? Randy Gardner holds the scientifically documented record for the longest period a human being has intentionally gone without sleep without using any stimulants. Gardner stayed awake for 264 hours (11 days). Long periods of sleeplessness can cause paranoia and even hallucinations at the time, but occasional sleep deprivation doesn't do any long-term damage.