Anyway, how important is sleep anyway??? Is it really THAT important? This is what I read about the...
Benefits of sleep:
Sleep is an important function of good health. Just as cholesterol and blood pressure are good indicators of overall health, so too is healthy sleep.
Research shows that the body restores itself during sleep. As we sleep, tissue grows and repairs itself and the immune system is strengthened. The brain may also repair itself during sleep and researchers believe sleep is critical to healthy brain function. In fact, researchers also believe the brain performs actions vital to learning and memory during sleep. Sleep can also affect the levels of hormones and other important chemicals circulating in your body
Do you know what happens when you sleep?
A good night's sleep actually consists of different stages and levels of sleep. In sleep clinic studies, people have been connected to an electroencephalograph (EEG) machine that measures electric brain activity. An EEG allows us to see when there is a lot of brain activity and when the mind is at rest.
From recording brain activity and monitoring other bodily functions, scientists now divide a night of sleep into two general phases. Together, these two phases form one complete sleep cycle that lasts approximately 90 minutes. You go through two to five of these cycles in a typical night's sleep.
PHASE 1 - The first general phase of sleep consists of 4 stages and is called Non-Rapid Eye Movement sleep, or NREM.
Stages of NREM Sleep:
Stage 1: When you first fall asleep, you enter the lightest stage of sleep. It's really a bridge between wakefulness and deep sleep, and you can be easily awakened during this time. Your senses are muted, so you won't be bothered by light sounds. However, loud noises - a car alarm, slamming door or crying child - can wake you up.
Stage 2: Since no loud noises woke you up, you now travel into a deeper sleep. During this stage your heart rate evens out and your body temperature drops. This stage accounts for roughly half of an average night’s sleep.
Stages 3 and 4: Stages 3 and 4 are the deepest phases of non-REM sleep and represent about 15% of a total night’s sleep. During these combined stages of sleep, your blood pressure falls, your body temperature continues to drop and your breathing slows. The noises that might wake you during stage 1 sleep do not rouse you during these later, deeper stages of sleep.
PHASE 2 - Most people have heard of the second general phase of sleep - Rapid Eye Movement sleep or REM.
REM Sleep:
After approximately 30 minutes of deep sleep in non-REM stages 3 and 4, we begin to cycle back through stages 2 and 1 until we enter the period of REM sleep. The brain activity during REM sleep is similar to brain activity during wakefulness. Dreaming is common in REM sleep.
So then...What is a Good Night's Sleep?
When you get a good night's sleep, you wake up feeling restored, refreshed, alert and ready to face the day ahead. Good sleep is restorative. It allows us to be more effective and productive in our jobs and daily lives as well as in our personal relationships. Good sleep also enhances our quality of life. It helps us to feel good and have a sense of well-being throughout the day.
You've probably heard the magic number is 8 hours a night. In truth, different people have different sleep needs. If you wake up feeling refreshed, then you received the correct amount of sleep.
Just as we all recognize the benefits of a good night's sleep, we all know how it feels to have slept poorly. For most people, even a few nights of reduced sleep can have a dramatic impact on their well being. In all, more than 40% of adults experience daytime sleepiness severe enough to interfere with their daily activities. Additionally, long term sleeplessness has been associated with depression, obesity and other mental health disorders.