Blue light emitted by devices like smartphones, computers, and televisions is becoming a major factor disrupting our sleep cycles. Research reveals that a significant number of Americans use electronic devices close to bedtime, contributing to poor sleep quality. Reducing exposure to blue light, particularly in the evening, is a simple yet effective way to help your body prepare for restful sleep.

What Is Blue Light?

How Does Blue Light Impact Circadian Rhythms?

Circadian rhythms are 24-hour cycles that control essential bodily functions, including sleep. Light is the primary factor that aligns these rhythms with day and night. Historically, exposure to sunlight during the day helped set our body clocks, signaling when to be awake and when to sleep. However, the widespread use of artificial lighting and electronic devices has introduced more light exposure after dark, disrupting these natural cycles.

Blue light, in particular, has the strongest impact on circadian rhythms. During daylight hours, blue light helps us feel alert by stimulating the brain, raising body temperature, and increasing heart rate. But in the evening, exposure to blue light can confuse the body’s internal clock, suppressing melatonin—the hormone responsible for making us feel sleepy. As a result, our brains may remain in “daytime mode,” preventing us from winding down for the night.

Health Consequences Of Disrupted Sleep

Persistent disruption of circadian rhythms can lead to a range of health issues, including metabolic disorders, poor mental health, and increased risk for conditions like depression and anxiety. Furthermore, the inability to sleep well at night affects cognitive performance, mood, and overall well-being. Chronic exposure to blue light in the evening may significantly contribute to these negative health outcomes.

Devices That Emit Blue Light

Many common devices in our daily lives emit blue light, including:

- Smartphones and tablets

- Computer monitors and laptops

- Televisions and e-readers

- LED and fluorescent lighting

- Video game consoles

How To Minimize Blue Light Exposure

To reduce the effects of blue light on your sleep, here are some practical strategies:

1. Turn off screens before bed: Try to avoid using electronic devices at least two to three hours before bedtime. Reducing screen time helps prevent blue light from interfering with melatonin production.

2. Adjust your lighting: Dim your home’s lights or switch to warmer-toned lighting in the evening. You can also use lamps with red or orange light, which are less likely to impact your circadian rhythms.

3. Night mode settings: Many smartphones and computers have a "night mode" feature that reduces blue light emission. Make use of these features to limit exposure in the hours leading up to bedtime.

4. Blue light-blocking glasses: Special glasses designed to filter out blue light may be helpful for some individuals. These glasses can block or reduce the melatonin-suppressing effects of blue light.

5. Apps for blue light reduction: There are several smartphone and computer apps available that reduce blue light emission, allowing you to use your devices before bed without disturbing your sleep.

6. Create a sleep-friendly environment: If you can’t control light sources in your bedroom, consider using an eye mask to block out ambient light and promote better sleep.

Atrial fibrillation (AFib) is an irregular and often very rapid heart rhythm, also called an arrhythmia and can create blood clots in the heart, which can increase your risk of having a stroke by five times.

When a person has AFib, the normal beating in the upper chambers of the heart (the two atria) is irregular and blood doesn't flow as well as it should from the atria to the lower chambers of the heart (the two ventricles).

In this case, the risk of developing blood clots in your heart increases, which can not only cause a heart attack but also damage vital organs such as your brain. An AFib may happen in brief episodes, or it may be a permanent condition.

Common symptoms include palpitations (the feeling that your heart is racing, pounding, fluttering or like you have missed heartbeats), chest pain, finding it harder to exercise, tiredness, shortness of breath, dizziness or feeling faint.

READ MORE: You Can Stop A Heart Attack With This Medicine, Cardiologist Reveals Heart Attack 101

The death rate from AFib as the primary or a contributing cause of death has been rising for more than two decades.

Over 454,000 people with AFib are hospitalized in the US each year, out of which 158,000 die of the cause. It is estimated that 12.1 million people in the US will have AFib in the US will have AFib by 2050.

Who Is At Risk Of Having AFib?

• Advancing age.
• High blood pressure.
• Obesity.
• European ancestry.
• Diabetes.
• Heart failure.
• Ischemic heart disease.
• Hyperthyroidism.
• Chronic kidney disease.
• Moderate to heavy alcohol use.
• Smoking.
• Enlargement of the chambers on the left side of the heart.

Treatment for AFib includes medications to control the heart's rhythm and rate, therapy to shock the heart back to a regular rhythm and procedures to block faulty heart signals.

A person with atrial fibrillation also may have a related heart rhythm disorder called atrial flutter. The treatments for AFib and atrial flutter are similar.

How To Improve Your Heart Health

Experts recommend following the below to reduce yor risk of stroke or developing AFib and maintaining heart health:

• Don't smoke or use tobacco.
• Aim for at least 150 minutes of moderate physical activity or 75 minutes of vigorous physical activity (or an equal combination of both) each week. Eat a heart-healthy diet.
• Stay at a healthy weight.
• Get quality sleep.
• Manage stress levels
• Get regular health screening tests.
• Eat a fiber, nuts and fish-rich diet
• Limit salt intake
• Reduce saturated fat intake

Changes in your voice, whether in tone, volume, speed or overall quality, can act as early warning signs for a wide range of medical conditions, experts say.

Your voice is produced by the coordinated effort of your respiratory system, vocal cords (also called vocal folds), and the resonating chambers of your throat, mouth, and nose. Even subtle shifts in hormone levels, hydration status or tissue health can noticeably affect how you sound.

Recent research shows that subtle changes in speech, for example, slurring or vocal cord tremors, may be signs of disease or illness like Parkinson’s disease, depression, cardiac and mental health problems, as speech requires coordination with the brain, muscles and respiratory system.

Which Conditions Can You Identify By A Change In Voice?

• Diabetes: High-pitched, raspy voices or vocal strain can be linked to diabetes, with AI studies showing up to 75% accuracy in prediction.
• Cardiovascular Disease: Voice analysis can detect high, fluttering voices associated with coronary artery disease, caused by stress or fluid changes in the vocal cords.
• Hypothyroidism: A deeper, softer, or huskier voice can indicate thyroid dysfunction.
• Respiratory Illnesses: Conditions like COVID-19 or COPD are often associated with a breathy voice, coughing, and short, interrupted sentences.
• Throat Cancer: Persistent hoarseness and raspy voice, especially lasting more than 2-3 weeks, can indicate laryngeal cancer.
• Parkinson’s Disease: Identified by a monotone voice, reduced volume, increased breathiness, and vocal cord tremors.
• Alzheimer’s Disease/Dementia: Characterized by slower speech rates, hesitation, frequent pauses, and simplified vocabulary/sentence structure.
• Stroke or Brain Injury: Indicated by slurred speech or difficulty finding words (global aphasia).
• Cerebellar Disorders (caused by damage to the nerves in the brain's cerebellum): Manifest as loud, staccato speech (bursts of broken sounds).
• Depression: Linked to a flatter, softer, and more monotone voice with a reduced pitch range.
• Anxiety/Stress: Often presents as a higher-pitched, faster, and more tremulous voice.
• Schizophrenia: Indicated by monotone, disorganized speech.

What Else Can Affect Your Voice?

Apart from serious medical conditions, voice changes may also be linked to aging and lifestyle factors. Fluctuations in testosterone, estrogen, progesterone, and thyroid hormone levels may also influence the structure and function of the vocal cords.

Dehydration is one of the most common causes of voice problems, as cords need adequate moisture to vibrate efficiently. Aim for at least 64 ounces of water daily, and more if you use your voice professionally or live in a dry climate.

Smoking irritates and inflames the vocal cords, causing chronic hoarseness and increasing the risk of vocal cord cancer. Even secondhand smoke and vaping can affect voice quality.

Diet also plays a role in vocal health. Caffeine and alcohol are diuretics that can dehydrate your vocal cords. Spicy foods and acidic beverages may trigger reflux, irritating the throat.

Dairy products can increase mucus production in some people, affecting voice clarity. Voice overuse or misuse, common in teachers, singers, and public speakers, can lead to vocal fatigue and damage. The following table compares how different lifestyle factors impact your voice.

How Can You Take Care Of Your Voice?

Whether the cause is hormonal changes, medical conditions, aging, or lifestyle factors, most voice problems can be improved with proper diagnosis and treatment. Here are some things you can do to take care:

• Stay hydrated by drinking water throughout the day and using a humidifier in dry environments
• Warm up your voice before extended speaking or singing with gentle humming or lip trills
• Avoid shouting or whispering, both of which strain the vocal cords
• Take voice breaks during prolonged speaking to prevent fatigue
• Manage stress through relaxation techniques, as tension affects voice quality
• Treat allergies and sinus problems promptly to reduce postnasal drip
• Maintain good posture to support optimal breathing and voice production

Living under constant psychosocial stress can significantly raise the risk of developing dementia and a stroke, a JAMA Network study suggests.

Psychosocial stress is a type of stress related to our relationships with others, usually arising from feeling judged, excluded, or not enough in others' eyes. It can also put a person in fight-or-flight mode, causing both mental and physical symptoms.

According to Chinese researchers, people who experience this form of stress in childhood as well as adulthood face more than a threefold higher risk of developing dementia compared with those in other groups.

Similarly, young people experiencing stressful situations in their adulthood had a significantly higher risk of stroke incidence that their counterparts.

Based on these results, the study highlights that early identification of psychosocial stressors, combined with effective mental health support and depression prevention, may reduce the long-term burden of neurodegenerative and cerebrovascular disease.

What Did The Study Find?

The scientists defined adverse childhood experiences (ACEs) as traumatic exposures occurring during childhood, typically grouped into 3 categories: household dysfunction, social dysfunction and family death or disability.

On the other hand, traumatic exposures occurring during adulthood were defined as adverse adult experiences (AAEs), which include events such as the death of a child, lifetime discrimination, ever being confined to bed, ever being hospitalized for a month or longer and ever leaving a job due to health conditions.

While analyzing the data they collected from the participants, the researchers also found that depression partly explained the links in all major relationships as it accounted for more than one-third of the connection between childhood adversity and dementia, and about one-fifth of the link between adulthood adversity and both dementia and stroke.

READ MORE: Avoid Doing These 3 Things Prevent Dementia, According To Neurologist

These findings suggest that long-term psychological stress may lead to brain and blood vessel diseases by causing ongoing emotional distress, unhealthy behaviours, and biological changes like inflammation and abnormal stress responses.

Psychosocial Stress: An Unseen Form Of Stress

Psychosocial stress can trigger physiological responses like increased heart rate, cortisol secretion, and inflammation, significantly increasing risks for hypertension, cardiovascular disease and mental health disorders.

This kind of stress can affect men, women, and people of all genders differently, but many of the symptoms are still the same. Common symptoms include:

• Sweating
• An increase in blood pressure
• Rapid heartbeat
• Dizziness
• Nausea and digestive problems
• Strong emotional reactions such as sadness or irritability
• Drug or alcohol abuse

These symptoms can be acute or chronic, meaning for some people they go away, and for others, they persist over a long period of time. Meeting with a therapist is often recommended for those living with chronic stress.

Experts typically suggest developing coping mechanisms include building support networks, utilizing relaxation techniques, and, in cases of severe mental impact, seeking professional support to help deal with psychosocial stress.