10 Reasons Why Good Sleep is So Important
10 Reasons Why Good Sleep is So Important
Poor Sleep Can Make you Fat
Poor sleep is strongly linked to weight gain.
In fact, short sleep duration is one of the strongest risk factors for obesity.
In one extensive review study, children and adults with short sleep duration were 89% and 55% more likely to become obese, respectively (3).
If you’re trying to lose weight, getting quality sleep is absolutely crucial.
Good Sleepers Tend to Eat Fewer Calories
Studies show that sleep-deprived individuals have a bigger appetite and tend to eat more calories.
Good Sleep Can Improve Concentration and Productivity
Sleep is important for various aspects of brain function.
This includes cognition, concentration, productivity and performance (7).
All of these are negatively affected by sleep deprivation.
A study on medical interns provides a good example.
Interns on a traditional schedule with extended work hours of more than 24 hours made 36% more serious medical errors than interns on a schedule that allowed more sleep (8).
Another study found that short sleep can negatively impact some aspects of brain function to a similar degree as alcohol intoxication (9).
Good Sleep Can Maximize Athletic Performance
Sleep has been shown to enhance athletic performance.
In a study on basketball players, longer sleep was shown to significantly improve speed, accuracy, reaction times and mental wellbeing (13).
Less sleep duration has also been associated with poor exercise performance and functional limitation in elderly women.
A study in over 2,800 women found that poor sleep was linked to slower walking, lower grip strength and greater difficulty performing independent activities (14).
Poor Sleepers Have a Greater Risk of Heart Disease and Stroke
It’s known that sleep quality and duration can have a major effect on many health risk factors.
These are the factors believed to drive chronic diseases, including heart disease.
A review of 15 studies found that people who don’t get enough sleep are at far greater risk of heart disease or stroke than those who sleep 7–8 hours per night (15).
Sleep Affects Glucose Metabolism and Type 2 Diabetes Risk
In a study in healthy young men, restricting sleep to four hours per night for six nights in a row caused symptoms of prediabetes (18).
These symptoms resolved after one week of increased sleep duration.
Poor sleep habits are also strongly linked to adverse effects on blood sugar in the general population.
Poor Sleep Is Linked to Depression
Mental health issues, such as depression, are strongly linked to poor sleep quality and sleeping disorders.
Poor sleep is even associated with an increased risk of death by suicide (22).
Those with sleeping disorders like insomnia or obstructive sleep apnea also report significantly higher rates of depression than those without (23).
Sleep Improves Your Immune Function
Even a small loss of sleep has been shown to impair immune function (24).
One large two-week study monitored the development of the common cold after giving people nasal drops with the cold virus (25).
They found that those who slept less than seven hours were almost three times more likely to develop a cold than those who slept eight hours or more.
If you often get colds, ensuring that you get at least eight hours of sleep per night could be very helpful. Eating more garlic can help as well.
Poor Sleep Is Linked to Increased Inflammation
Sleep can have a major effect on inflammation in your body.
In fact, sleep loss is known to activate undesirable markers of inflammation and cell damage.
One study observed that sleep-deprived people with Crohn's disease were twice as likely to relapse as patients who slept well (28).
Researchers are even recommending sleep evaluation to help predict outcomes in individuals with long-term inflammatory issues (27).
Sleep Affects Emotions and Social Interactions
Sleep loss reduces your ability to interact socially.
One study found that people who had not slept had a reduced ability to recognize expressions of anger and happiness (31).
Researchers believe that poor sleep affects your ability to recognize important social cues and process emotional information.