The world that we live in is filled with sounds, some are comforting and some could be jarring too. But what if the constant noise surrounding us is doing us more harm than we realize? There has been immense research that shows that noise is not just a nuisance, but a silent killer and affects our health in ways we do not even know. There are associations of sound causing heart attacks, type 2 diabetes, and dementia.

How Does Your Body Respond To Noise?

Noise is seen as an annoyance, but it effects can go beyond what we imagine. When we hear a sound, it travels through the ear to the brain. This is where it gets processed by the amygdala. It is a region that is responsible for emotional responses. This also triggers a stress response- our heart rate increases, our blood pressure rises, and stress hormones like cortisol flood our system.

This response is also designed to help us react to immediate threats. Especially, if we hear the sound of a predator approaching. However, when we are exposed to constant noise, this response is triggered repeatedly and could compel us to live in a long-term anxious state.

Hidden Health Risks

Many studies including Harvard Health and theAmerican College of Cardiology have found associations of noise with health problems including putting a person at a higher risk of cardiovascular diseases such as heart strokes, attacks, and high blood pressure. The constant activation of the stress response can take a toll on the body, increasing inflammation and making it harder for the heart and circulatory system to function properly. Over time, this can lead to serious health conditions like heart disease and diabetes.

Even more troubling, research suggests that noise pollution may contribute to mental health issues. Studies have found a strong connection between exposure to noise and disturbed sleep, which in turn can cause anxiety, depression, and cognitive decline. The World Health Organization estimates that noise contributes to around 12,000 premature deaths annually across Europe alone. This invisible threat, however, is often overlooked because the effects are gradual and cumulative.

Noise and Sleep: A Silent Disturbance

One of the most insidious aspects of noise pollution is its impact on sleep. Even when we are asleep, our bodies are not fully immune to the effects of sound. Our ears never fully “turn off,” meaning that even faint noises can disrupt our sleep cycle. Research has shown that people who live in noisy environments—whether near busy roads, airports, or urban centers—often experience fragmented sleep, leading to fatigue and a weakened immune system. Over time, this chronic lack of restful sleep can lead to significant health problems, including an increased risk of developing cognitive disorders such as dementia.

The Urbanization Problem

As cities continue to grow, noise pollution is becoming more widespread. Traffic noise, in particular, is one of the most common and harmful sources. The rise of urbanization means more cars, buses, and trains, all of which contribute to an ever-increasing din. This urban soundscape is often relentless, with little respite for those living within it. In densely populated cities, people are exposed to high decibel levels, which can exceed safe thresholds for heart health. In many cases, the sheer volume of sound is not just unpleasant; it’s dangerous.

What Can We Do About It?

The solution is not as simple as reducing noise in our immediate surroundings, though efforts to reduce traffic noise and limit industrial sounds are essential. Some cities have taken steps to create quieter spaces by converting busy roads into pedestrian zones or installing noise barriers. These measures have shown to have a positive impact on public health, with research suggesting that even small reductions in noise can prevent premature deaths and improve overall well-being.

Keeping the television on while falling asleep or leaving a light on in the bedroom may feel reassuring, but new international research suggests it could seriously affect heart health. A recent study has found that exposure to light at night significantly raises the risk of heart disease, even if a person believes they are sleeping well.

Sleeping With Lights On Could Harm Your Heart, Study Warns

The findings come from a large, long-term study carried out by researchers in Australia and the United States. The team followed nearly 90,000 adults in the United Kingdom over a period of nine years. Participants were given light sensors to accurately measure how much light they were exposed to during sleep.

Researchers tracked cases of heart attack, heart failure, and stroke throughout the study period. The results were striking. Compared to people who slept in complete darkness, those exposed to light at night faced a 56 percent higher risk of cardiovascular problems. The risk of heart failure increased by 47 percent, while the likelihood of coronary artery disease rose by 32 percent. The study noted that this risk was particularly higher among women. The risk of stroke was also found to be up to 30 percent higher.

Why Night-Time Light Is Dangerous

According to the research, published in JAMA Network Open, the main reason behind this increased risk is disruption of the body’s circadian rhythm. This internal biological clock regulates sleep, hormone release, metabolism, and other vital functions.

Artificial light at night interferes with this natural rhythm, pushing the body into a state of imbalance. Over time, this ongoing disruption places added strain on the cardiovascular system. Researchers warned that for people over the age of 40, exposure to light during sleep is emerging as a significant risk factor for heart disease.

Professor Frank Scheer, a neuroscientist at Brigham and Women’s Hospital, believes doctors should look beyond sleep duration when assessing patients’ sleep habits. He says physicians should also ask about bedroom conditions, including light exposure.

“There is no harm in keeping the bedroom completely dark,” he explained. “In fact, it is extremely beneficial for overall health.”

Simple Tips For Better, Heart-Healthy Sleep

Experts suggest a few practical steps to reduce light exposure at night:

• Turn off the television, mobile phones, and laptops before going to bed
• If light is needed for safety, keep it below 5 lux, roughly equivalent to the soft glow of a few candles
• Use thick, dark curtains to block out streetlights and outside glare
• Sleeping in darkness may seem like a small change, but researchers say it could play an important role in protecting heart health over time.

Researchers also noted that many people underestimate how much light they are exposed to at night. Even dim sources such as alarm clocks, charging indicators, or light filtering in from nearby buildings can affect the body’s natural night-time processes. Over years, this low-level but constant exposure may quietly increase the risk of high blood pressure, insulin resistance, and weight gain, all of which are closely linked to heart disease. The study reinforces a growing body of evidence that sleep quality is shaped not just by how long we sleep, but by the environment we sleep in.

A neurologist has spoken about a simple daily practice that may help guard against cognitive decline, and it requires just six minutes. Dr Clint Steele, a specialist in the brain and nervous system, works with patients to improve quality of life by strengthening brain function and preventing, and in some cases reversing, conditions such as dementia.

What Is Dementia?

Dementia is an umbrella term used to describe a significant decline in mental function that is serious enough to affect everyday life. It commonly impacts memory, thinking, and reasoning skills. Dementia itself is not a single disease but a collection of symptoms caused by underlying conditions such as Alzheimer’s disease or vascular dementia. Common signs include memory problems, confusion, difficulty finding words, changes in mood or behaviour, and trouble completing familiar tasks.

These symptoms usually worsen over time and are not considered a normal part of ageing. Although there is no cure, treatment options can help manage symptoms, and early diagnosis plays an important role in care planning.

Dementia: Signs And Symptoms

The signs of dementia can differ from person to person. Some common examples include difficulty with short-term memory, misplacing personal belongings like a purse or wallet, trouble managing finances or paying bills, challenges with planning or cooking meals, forgetting appointments, and becoming disoriented when travelling outside familiar areas.

Dementia symptoms tend to be progressive, meaning they often begin subtly and gradually become more severe over time, eventually interfering with daily functioning. If you or someone close to you notices ongoing memory issues or changes in thinking or behaviour, it is important not to dismiss them.

Six-Minute Daily Routine That May Help Slow Dementia Risk

The 56-year-old expert says that reading for six minutes a day could meaningfully lower the risk of dementia, Alzheimer’s disease, Parkinson’s disease, and other neurological conditions. In a TikTok video that has since been viewed thousands of times, Dr Steele points to long-term research showing that strengthening what is known as “cognitive reserve” may help prevent or reduce the likelihood of dementia and similar disorders, as per Mirror.

Why Cognitive Reserve Matters

According to Dr Steele, one way to support cognitive function is by learning new skills, such as picking up a foreign language, learning to dance, or simply reading a book for at least six minutes each day. “Reading six minutes a day actually lowers your risk of dementia, Alzheimer’s, Parkinson’s disease and more,” he told What’s The Jam.

He explained that reading helps build cognitive reserve, which refers to the brain’s ability to adapt. “Adaptability is so important because when you encounter stress, you want your brain to be able to adjust to that stress, respond in the right way, and then, once the stress has passed, adapt again and settle down,” he said.

A Small Daily Commitment

“One of the most important things you can do is read six minutes a day, according to the research, and that will help,” Dr Steele added. Based in Maine and Florida in the US, he has spent 34 years focused on brain health and dementia prevention.

Public Response To The Advice

His TikTok video has also drawn hundreds of likes and comments. One viewer wrote: “Normally read at least 100 books a year, plus the Bible, dance classes, acrobatics, clogging for at least six years, at 84 still moving, just slower, my mom had Alzheimer’s, so I do know!”

Another commented: “I still enjoy reading news every day.” A third added: “Another really good one is fine art, probably why so many older people take up painting.”

Students gaming more than 10 hours a week can have long-lasting negative effects on their physical and mental health, a new Australian study suggests.

Researchers from Curtin University, Perth have found that playing online games for over 10 hours can worsen diets, increase body weight and led to poorer sleep than lighter gamers.

Professor Mario Siervo, Curtin School of Population Health said of the results: "What stood out was students gaming up to 10 hours a week all looked very similar in terms of diet, sleep and body weight. The real differences emerged in those gaming more than 10 hours a week, who showed clear divergence from the rest of the sample."

What Did The Study Find?

Researchers surveyed 317 students across five Australian universities, with a median age of 20, to understand how time spent gaming each week might affect their diet, sleep, and body composition.

Students were categorized as low gamers (zero to five hours a week), moderate gamers (five to 10 hours) or high gamers, who played video games for more than 10 hours each week.

They found that low and moderate gamers showed largely comparable health outcomes but health indicators deteriorated sharply among students whose gaming time exceeded 10 hours a week.

The study found diet quality declined and obesity was more common once gaming exceeded 10 hours a week, with each extra hour linked to poorer diets even after accounting for other lifestyle factors. While high gamers recorded a body mass index (BMI) of 26.3kg/m2, low and moderate gamers fell within a healthier range, with median BMIs of 22.2kg/m2 and 22.8kg/m2 respectively.

Professor Siervo said: "Each additional hour of gaming per week was linked to a decline in diet quality, even after accounting for stress, physical activity and other lifestyle factors."

Additionally, sleep quality was generally poor across all groups but students who played video games for moderate or high amounts of time reported worse sleep than low gamers.

Despite clear results, the expert added that the study does not prove cause and effect but shows excessive gaming is linked to higher health risks, while low to moderate play appears largely fine.

Why Is Playing Video Games Bad For You?

"Our data suggests low and moderate gaming is generally fine, but excessive gaming may crowd out healthy habits such as eating a balanced diet, sleeping properly and staying active.

"Because university habits often follow people into adulthood, healthier routines such as taking breaks from gaming, avoiding playing games late at night and choosing healthier snacks may help improve their overall well-being," Professor Siervo said.

Playing video games for excessive amount of time has also been linked to paving the way for mental health problems such as anxiety, depression, aggression and poor emotional control as well as social/life problems including neglecting responsibilities, isolation, poor relationships, academic/career impact.

Moreover, previous research has also found that playing games for over three hours straight significantly raises the risk of physical issues. Sessions exceeding this time frame can lead to eye fatigue, headaches, neck pain and wrist pain, regardless of the player's age or gender.

This study was published in Nutrition on January 16.