For example, yawning, fatigue and irritability are telltale signs that you are not getting enough sleep. Your eyes will move from side to side and your brain waves will be more active during this stage of SLEEP than in stages two or three. Getting enough sleep is necessary for a number of reasons, such as maintaining the immune system, metabolic functions and memory, as well as regulating body weight. When you don't get enough sleep, leptin levels decrease, meaning you don't feel as satisfied after eating, and ghrelin levels increase, stimulating your appetite so you want more food.
One of the most alarming results of the sleep study is that the group that slept six hours did not rate their sleepiness as bad, even when their cognitive performance was declining. While eating before bed doesn't directly impact sleep quality, it can lead to heartburn or chest discomfort that can keep you awake at night. If you wake up during REM sleep, you increase the risk of feeling groggy or too sleepy the next day. Stimulants such as caffeine, alcohol and even sleeping pills can interfere with your ability to fall asleep and stay asleep.
This drowsiness may be a sign of an underlying medical condition or sleep disorder, such as narcolepsy or sleep apnoea. Therefore, it is essential to pay attention to how you feel to determine if you are getting the right amount of sleep. Once you have a nightly goal based on the hours of sleep you need, it's time to start planning how to make it happen. If you are sleeping six hours or less per night while experiencing these symptoms, you will either need to increase the amount of sleep you are getting to reflect the nightly recommendations for your age, or you will need to find ways to improve your sleep quality.
Worse, too little or poor quality sleep can increase the likelihood of developing chronic diseases such as diabetes, obesity and heart disease (10, 11, 12, 1). In this sleep deprivation study, published in the journal Sleep, 48 adults were taken and restricted to a maximum of four, six or eight hours of sleep per night for two weeks; an unfortunate subset were deprived of sleep for three days in a row. The amount of sleep needed depends on many different factors, such as age, genetics and quality of night-time sleep.