How many hours is good enough to keep you healthy?

8 hours ago sleep for good health. daily walk, drinking watter daily, relaxation mint it's good enough to keep you healthy.

Sleep is actually quite a complicated thing and the number of hours 'in bed' or 'unconscious' is not as important as the amount of rest the body requires and the amount of 'subconscious processing time' the brain requires. Older people seem to need less sleep, on the whole, than younger people. This may just be because older people tend to be less active than younger people so that the body itself needs less relaxation but (being an 'older person' myself) I don't think this is entirely true. Certainly there are different levels of 'sleep' and these are more to do with brain activity than with the need for the body (muscles, digestive system and other organs, immune system and so on) to rest and repair itself. The brain is well known to generate certain detectable rhythms of electrical impulses at the various levels of sleep - 'deep sleep' is when the slower rhythms dominate and 'light sleep' is when the faster rhythms are more evident (and when we are most likely to dream). There are a number of famous figures - Sir Winston Churchill, Margaret Thatcher and Napoleon amongst them - who only appeared to need a few hours of sleep a night. I think that this was partly because they were able to go into a 'deep' state of sleep quite often during the day - often for only seconds at a time. so that their colleagues didn't notice. There are many animals which can do this and some - horses, for example - which hardly ever lie down to sleep. The word 'catnap' has been coined for just such a situation where a person, like cats, may access the deep level of sleep very quickly and just as quickly awake from it, completely alert. I think that everyone is their own best judge of how long they need to sleep. If you wake feeling tired, then you either haven't slept properly or enough or you are slow to come out of the deeper stages of sleep. Very young children need to sleep more (and do) than adults partly because their brain has to process much more random information and turn it into experience. Once that 'experience' (which is really memory telling us what we need to take notice of and what can be rejected as of no value) grows, we need to do less and less of this processing and so we tend to need less 'sleep'. Rest is mainly needed so that the muscles can get rid of the used products of activity and replenish their resources of carbohydrates and oxygen. That this normally and conveniently happens when our brain is also needing to process stuff without being distracted by 'input' is something that we associate with 'sleep'. As a general rule, about one third of our life (8 hours) seems to be what most people need to spend in the process of 'sleep'. For some people there is quite a long time when we are, as it were, 'going to sleep' or 'waking up'. Other people seem to be able to reach the 'deep' sleep almost instantly (within minutes) and therefore, probably, seem to sleep less.

i think 7-8 hours is good for health. because complete sleeping is must for over life..

Hello alok, Sleeping time for adults is 7-8 hours and it may vary on individuals. Some are happy with 6 hours sleep but lack of sleep may even affect your memory, so sufficient sleep is very necessary for every individual. In old age it is natural to get reduction in sleeping time. I think your grandfather could not sleep well in night he can sleep some time in day so his health won’t affect due to lack of sleep.

atleast eight hours is good for health

at least 6 hours of sound sleep is required to keep your body and mind healthy. its recommended by doctors. well result of violation is not prompt, but it damages you from inside actually.

at least 8 hrs sleep is good for his health