Insufficient Sleep and Its Impact on Health


If you ever spend a night tossing and turning, you already know how you’ll feel tired, cranky, and out of sorts the next day. But missing out on the recommended 7-9 hours of sleep does more than make you feel dizzy and grumpy. 

Generally, sleep loss in adults refers to sleep of a shorter duration than the average requirement of 7-8 hours each night. The primary symptom of sleep loss is excessive daytime sleepiness. Still, other symptoms include depressed mood and poor memory or concentration. Chronic sleep loss, neither a formal syndrome nor a disorder, has severe health, performance, and safety consequences. You may visit getdiazepam online to get suitable treatments from a variety of options.

The long-term adverse effects of sleep deprivation are real. It drains mental abilities and puts your physical health at real risk. In addition, science has linked poor slumber with several health issues, from weight gain to a weakened immune system. Read on to learn how insufficient sleep affects specific body functions and systems.

Central Nervous System

The central nervous system is the leading information highway of your body. Sleep is necessary to keep it functioning correctly. Still, chronic insomnia may disrupt how the body sends and processes information. During sleep, pathways form between nerve cells in the brain that help you remember new information you have learned. Sleep loss leaves your brain exhausted, so it may not perform its duties well. 

You may also find it more challenging to concentrate or learn new tasks. The signals your body sends might be delayed, decreasing coordination and increasing your risk for accidents.

Sleep deprivation also negatively affects mental abilities and emotional states. For example, you may feel more impatient or prone to mood swings. It may also compromise decision-making processes and creativity. 

Sleep loss is linked with adverse effects on mood and behaviour. Chronic sleep-deprived adults report excess mental distress, depressive symptoms, anxiety, and alcohol use. If sleep deprivation is prolonged, you may start having hallucinations, seeing or hearing things that aren’t physically present. A lack of sleep may also trigger mania in people with bipolar mood disorder. Other psychological risks include:

  • Impulsive behaviour
  • Depression
  • Paranoia
  • Anxiety 
  • Suicidal thoughts 

You may also experience microsleep during the day. You’ll fall asleep for several seconds without realising it during these episodes. Microsleep is out of control and can be extremely dangerous if you drive. Operating heavy machinery with a microsleep episode may also make you more prone to injury.

Immune System

While you sleep, the immune system produces protective and infection-fighting substances like antibodies and cytokines. It utilises these substances to combat foreign invaders such as bacteria and viruses. Specific cytokines also help you sleep, making your immune system more efficient in defending the body against illness. 

Sleep deprivation prevents the immune system from building up its forces. So, if you don’t get enough sleep, your body may be unable to fight invaders. You may also take longer to recover from illness

Long-term sleep loss also increases your risk for chronic conditions like diabetes mellitus and heart disease. In addition, sleep deprivation and sleep complaints are linked with heart attacks (myocardial infarction) and perhaps stroke. Several potential mechanisms explain the link between sleep loss and cardiovascular events, including increased blood pressure, sympathetic hyperactivity, or impaired glucose tolerance

Respiratory System

The link between sleep and the respiratory system goes both ways. For example, a nighttime breathing disorder called obstructive sleep apnea can interrupt sleep and lower sleep quality. 

As you wake up during the middle of the night, this causes sleep deprivation, which leaves you more vulnerable to respiratory infections, including the common cold and flu. Sleep deprivation can also worsen respiratory diseases. 

Digestive System

Along with excessive eating and not exercising, sleep loss is a risk factor for being overweight and obese. This is because sleep affects two hormones, leptin and ghrelin, which control feelings of fullness and hunger. 

Leptin signals your brain that you’ve had enough to eat. Without sufficient sleep, your brain reduces leptin and raises ghrelin, an appetite stimulant. The flux of these two hormones interprets nighttime snacking or why you overeat late in the night. A lack of sleep also makes you feel too tired to exercise. Over time, reduced physical activity may make you gain weight as you’re not burning enough calories and not making muscle mass. 

Sleep deprivation causes the body to release less insulin after you eat. Insulin helps to reduce blood sugar (glucose) levels. However, it also lowers the body’s tolerance for glucose and is linked with insulin resistance. These disruptions may lead to diabetes mellitus and obesity.

When you sleep less than 7 hours a night, there is a dose-response relationship between sleep loss and obesity: the shorter you sleep, the greater the obesity. 

Cardiovascular System

Sleep affects processes that keep the heart and blood vessels healthy, including those that affect blood pressure, blood sugar, and inflammation levels. As a result, it plays a significant role in the body’s ability to heal and repair the heart and blood vessels. 

People with insufficient sleep are more likely to get cardiovascular disease. An analysis linked insomnia to an increased risk of heart attack and stroke.  

Endocrine System

Hormone production is dependent on your sleep. An individual needs at least 3 hours of uninterrupted sleep for testosterone production, about the time of your first REM episode. Therefore, waking up throughout the night might affect hormone production.

This interruption may also affect growth hormone production in children and adolescents. These hormones help your body build muscle mass, repair cells and tissues and perform other growth functions. The pituitary gland releases growth hormones throughout each day. Still, adequate sleep and exercise also help the release of this hormone.


We must get at least seven hours of slumber each night. But many of us routinely sleep for under six hours, a trend that can have serious health ramifications. Sleep loss and disorders are among the most common yet frequently overlooked and readily treatable health problems.  



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