Sleep is a time for your body to heal and repair itself, so it's important to get enough sleep each night. The quality of your sleep affects how well you function during the day and how well you recover from injuries or illness.
Sleep quality is a big issue for many people. Unfortunately, most of us don't get enough sleep and our sleep quality is often poor.
Sleep quality refers to the length of time you spend in each of the stages of sleep. Sleep consists of five different stages: wakefulness, stage 1, stage 2, slow-wave (deep) sleep and REM sleep.
Wakefulness is the first stage of sleep when your eyes are closed but your senses are still awake. You may feel like you're falling asleep but this state lasts only about five minutes.
Stage 1 is light sleep during which your eyes move under their lids and your heart rate slows down. Your body temperature drops slightly and your muscles relax even further than they did during wakefulness. If you are awakened from this stage, it can sometimes be difficult to recall any detail about what was going on around you just before you fell asleep.
Stage 2 is a transitional state between light sleep and deep sleep that lasts about 10 minutes on average. Brain waves slow down even further than they did during wakefulness or stage 1, but there's still some EEG activity that suggests that you're not fully asleep yet either.
Sleep quality is important for physical and mental recovery. REM sleep rejuvenates your mind, while deep sleep rejuvenates your body. This stage is when your brain is most active and dreams occur. It's also the stage when memories are formed and consolidated, which means you'll have better recall of what happened during the day if you get enough REM sleep at night. You need both types of sleep in order to feel rested when you wake up, according to the National Sleep Foundation (NSF).
Deep sleep rejuvenates your body, especially muscles, by releasing growth hormones that help maintain strong muscles and bones as well as repair tissue damage caused by exercise or injury.
The amount of time you spend sleeping varies from person to person, but most people require at least seven hours per night. If you're not getting enough shut-eye on a regular basis, it can affect your mood, concentration, and energy levels throughout the day.
The effects of poor quality sleep can be serious and even life-threatening in some cases. Research has linked insufficient sleep with a higher risk of heart disease, diabetes, and obesity — all conditions that can lead to premature death if left untreated.
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