Sleep and its huge benefits

I've often wondered, how long I could go without sleep. And about three years ago, did manage to stay awake for almost two days running,. That was of course, because I was travelling and the body clock was  very, very confused.

But what I do remember is that it wasn't a good feeling-at all, in fact.

Having done some basic reading, I'm reminded of the fact that sleep is a basic human need, as important for good health as diet and exercise. When we sleep, our bodies rest but our brains are active. Sleep lays the groundwork for a productive day ahead. Although most people need seven to nine hours of sleep each night to function well the next day, the National Sleep Foundation (NSF) 1998 Women and Sleep Poll ( USA)found that the average woman aged 30-60 sleeps only six hours and forty-one minutes during the workweek.

So how much sleep is really required?

The first thing experts will tell you about sleep is that there is no "magic number." Not only do different age groups need different amounts of sleep, but sleep needs are also individual. Just like any other characteristics you are born with, the amount of sleep you need to function best may be different for you than for someone who is of the same age and gender. While you may be at your absolute best sleeping seven hours a night, someone else may clearly need nine hours to have a happy, productive life.

Another reason there is "no magic number" for your sleep results from two different factors that researchers are learning about: a person’s basal sleep need – the amount of sleep our bodies need on a regular basis for optimal performance – and sleep debt, the accumulated sleep that is lost to poor sleep habits, sickness, awakenings due to environmental factors or other causes. Two studies suggest that healthy adults have a basal sleep need of seven to eight hours every night, but where things get complicated is the interaction between the basal need and sleep debt.

For instance, you might meet your basal sleep need on any single night or a few nights in a row, but still have an unresolved sleep debt that may make you feel more sleepy and less alert at times, particularly in conjunction with circadian dips, those times in the 24-hour cycle when we are biologically programmed to be more sleepy and less alert, such as overnight hours and mid-afternoon.

According to researchers Michael H. Bonnet and Donna L. Arand, "There is strong evidence that sufficient shortening or disturbance of the sleep process compromises mood, performance and alertness and can result in injury or death. In this light, the most common-sense 'do no injury' medical advice would be to avoid sleep deprivation."

On the other hand, some research has found that long sleep durations (nine hours or more) are also associated with increased morbidity (illness, accidents) and mortality (death). Researchers describe this relationship as a "U-shaped" curve (see illustration) where both sleeping too little and sleeping too much may put you at risk

I've made up my mind. - will definitely aim at getting all the sleep I need.

Right now,  I'm feeling really, really refreshed, having woken up from a long siesta, and all I can say is that everything certainly seems to be all right in my world....