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Did you know that there is a well-established link between lack of sleep and high blood pressure? This is because sleep plays a pivotal role in our cardiovascular health, so when we experience poor or insufficient sleep, it is negatively impacted.

The Relationship Between Sleep and Blood Pressure

During sleep, our bodies undergo a multitude of vital physiological processes that actively contribute to the maintenance of healthy blood pressure levels. These processes encompass the reduction of sympathetic nervous system activity, which is responsible for triggering the body’s “fight or flight” response, as well as the decrease in levels of the stress hormone cortisol. 

Additionally, a fascinating phenomenon called “nocturnal dipping” occurs, where our blood pressure experiences a slight decrease during sleep. This nocturnal dipping mechanism, alongside other intricate processes, plays a crucial role in promoting optimal cardiovascular health and consequently, regulated blood pressure. 

When we don’t get enough sleep, these processes can be disrupted, leading to high blood pressure, even in otherwise healthy individuals. Over time, chronic sleep deprivation (lack of sleep) can lead to inflammation in the body, which can further increase the risk of high blood pressure and related cardiac health problems.

The Effects of Sleep Deprivation on Blood Pressure

Unfortunately, many people struggle to get enough sleep on a regular basis, whether due to work, family obligations or other factors which can cause the following effects:

Increased Risk of Hypertension

Lack of sleep has been linked to an increased risk of high blood pressure, also known as hypertension. This is because the body’s natural blood pressure rhythms can be disrupted by lack of sleep, causing blood pressure levels to rise. 

Increased Stress Hormones

Sleep deprivation can cause the body to produce more stress hormones, such as cortisol and adrenaline, which can contribute to higher blood pressure levels. This puts the body in a state of “fight or flight,” which is not healthy. The body needs sleep to help regulate its hormones.

Disruption of Circadian Rhythms

We often experience multiple cycles of circadian rhythms throughout the night. When an individual’s circadian rhythm is interrupted, they are at increased risk of developing new or worsening hypertension. 

Narrowing of Blood Vessels

Sleep deprivation can cause blood vessels to narrow, making it more difficult for blood to flow freely through the body. This can contribute to higher blood pressure levels and potentially lead to clots.  

Increased Risk of Cardiovascular Disease

As plaque accumulates in the arteries as a result of high blood pressure, they are gradually narrowed and undergo a transformation, becoming rigid and less flexible. This hardening of the heart’s arteries can lead to cardiovascular ailments like heart attacks and heart failure.

Increased Inflammation

When a person’s heart and blood vessels are not working as they should, the body is not as capable of moving fluid within itself. This puts individuals at higher risk for fluid retention and inflammation. 

Causes of Sleep Deprivation

The causes of sleep deprivation can vary widely, from medical conditions to lifestyle factors. Some of the most common causes of sleep deprivation include sleep disorders such as insomnia or sleep apnea, stress, work schedules that require night shifts or early morning starts and lifestyle habits such as consuming caffeine or alcohol before bed.

Now, let’s examine each of these causes more closely.

Sleep Disorders

Sleep disorders such as insomnia, sleep apnea and restless leg syndrome can interfere with an individual’s ability to fall asleep or stay asleep, leading to sleep deprivation. 

Lifestyle Factors

Certain lifestyle habits can also contribute to sleep deprivation. These include consuming caffeine or alcohol before bed, having an irregular sleep schedule, viewing electronic devices before bed and lack of exercise. 


Sleep deprivation can be caused by high levels of stress and anxiety.

Medical Conditions

Certain medical conditions, such as chronic pain or depression, can interfere with sleep and contribute to sleep deprivation. 

Work Schedules

Many jobs, especially those in health care and law enforcement, require overnight hours. Individuals who work night shifts or have early morning starts may find it difficult to get enough sleep.

Environmental Factors

Factors such as noise, light and temperature can also impact an individual’s ability to fall asleep or stay asleep on a regular and healthy cadence.

Tips for Improving Sleep Quality

Unfortunately, many people struggle with getting quality sleep on a regular basis, whether due to medical conditions, lifestyle habits or other factors. The good news is, there are many simple yet effective tips that can help improve sleep quality, allowing individuals to wake up feeling refreshed and energized.

Consider implementing any of the tips below into your sleep routine.

Establish a Regular Sleep Routine

Going to bed and waking up at the same time every day, even on weekends, is important because this helps to regulate the body’s natural sleep-wake cycle. 

Create a Sleep-Conducive Environment

Before you go to bed, make sure your bedroom is cool, quiet and dark. You can also use comfortable bedding and pillows. 

Avoid Stimulating Activities Before Bed

Avoid using electronic devices or engaging in stimulating activities such as watching TV or exercising before bedtime. Blue light (which is emitted from phones and other electronic devices) has been shown to keep people awake. In order to manage this, most electronic devices have a “night mode” setting that makes the screen darker at specified hours.

Limit Caffeine and Alcohol

Avoid consuming caffeine and alcohol in the evening, as they can both interfere with sleep quality. 

Manage Stress

Incorporating relaxation techniques like meditation or deep breathing into your routine can be beneficial for managing stress and anxiety, thereby promoting better sleep and reducing the likelihood of sleep deprivation. 

Stay Active During the Day

Engaging in regular exercise can contribute to improved sleep quality; however, it is important to avoid exercising too close to bedtime as it can interfere with the ability to fall asleep. Regular daytime exercise helps to establish a pattern for our bodies, signaling the appropriate times to be alert and energized, as well as promoting feelings of tiredness and restfulness when needed. 

Consider Sleep Aids

In some cases, over-the-counter or prescription sleep aids may be helpful in improving sleep quality. However, it’s important to consult with a healthcare provider beforehand.

Final Thoughts

Ensuring an adequate amount of quality sleep is vital for maintaining optimal blood pressure and overall health. Take control of your health journey with UCF Health’s internal medicine services by making an appointment to learn how our experienced team can provide personalized care and guide you toward a healthier and happier life.