Health
Chronic Insomnia Linked to Faster Brain Ageing, Study Finds
Struggling with sleepless nights may do more than leave you feeling tired. A new study has found that chronic insomnia is linked to faster brain ageing and a higher risk of cognitive decline.
The research, published in the journal Neurology, showed that people with chronic insomnia — defined as difficulty sleeping at least three nights a week for three months or longer — were 40% more likely to develop dementia or mild cognitive problems than those who slept normally. On average, this translated to an additional 3.5 years of brain ageing.
“These findings add to a growing body of evidence that sleep isn’t just about rest — it’s also about brain resilience,” said Dr Diego Z. Carvalho, study author and neurologist at the Mayo Clinic in the United States.
Carvalho’s team followed 2,750 older adults who were cognitively healthy at the start of the study. Over nearly six years, participants underwent regular memory and thinking tests, with some also receiving brain scans. Around 16% had chronic insomnia.
By the end of the study, 14% of people with insomnia had developed dementia or mild cognitive impairment, compared with 10% of those without sleep problems. People with chronic insomnia also showed faster declines on thinking tests.
Brain scans revealed further clues. Participants reporting less sleep than usual were more likely to have white matter hyperintensities — bright spots indicating small blood vessel damage — and amyloid plaques, protein build-ups associated with Alzheimer’s disease. The study noted that the levels of amyloid in these participants were similar to those found in carriers of the APOE4 gene variant, which raises the risk of Alzheimer’s.
“Our results suggest that insomnia may affect the brain in different ways, involving not only amyloid plaques but also small vessels supplying blood to the brain,” Carvalho said.
Importantly, the study did not prove that insomnia directly causes dementia, only that the two appear to be connected. Researchers controlled for other factors such as age, high blood pressure, sleep apnoea, and the use of sleep medication, but further studies are needed to understand why poor sleep and brain health are linked.
The findings contribute to a broader body of research showing that poor sleep can raise the risk of several health conditions, including high blood pressure, heart disease, diabetes, depression, and obesity.
Globally, dementia affects an estimated 57 million people, according to the World Health Organization, while insomnia impacts more than 16% of the population in countries with reliable data.
“This study reinforces the importance of treating chronic insomnia — not just to improve sleep quality, but potentially to protect brain health as we age,” Carvalho said.
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Health
World Cup Emotion Can Strain the Heart, Cardiologists Warn Fans at Risk
As the World Cup begins, medical experts are cautioning football fans with underlying heart conditions that the emotional intensity of matches can place unexpected strain on the cardiovascular system.
Cardiologists say that the excitement, tension, and anxiety generated during high-stakes games can trigger physical reactions similar to intense exercise, raising heart rate, blood pressure, and stress hormones.
“Intense emotions, whether positive or negative, can act as ‘precipitating risk factors’ for cardiovascular events such as heart attack,” said Paola Santalucia, a cardiologist and board member of the European Heart Network.
She explained that moments of extreme excitement, such as a decisive penalty shootout or a last-minute goal, may pose risks for people already living with heart disease. Those with additional risk factors, including hypertension, obesity, or smoking habits, are also advised to be cautious during emotionally charged matches.
Research using wearable devices has shown that during major football events, some fans experience heart rates climbing as high as 150 beats per minute. That level is comparable to sprinting and reflects how strongly the body reacts to emotional stress.
A study examining supporters during the 2025 German Cup final found that even watching from home can significantly affect physiological responses. “They still had an increase in heart rate that compares to walking, even though they didn’t walk,” said Christian Deutscher, professor of sports economics at Bielefeld University and co-author of the study.
He noted that the most intense reactions often occur not during goals themselves, but during moments of uncertainty such as VAR checks, penalty shootouts, or shots striking the post. These unpredictable situations, he said, are what drive the strongest emotional and physical responses among fans.
Deutscher also pointed out that stadium spectators may experience even greater strain due to environmental factors such as heat and alcohol consumption.
However, experts emphasize that football itself is not inherently dangerous. Instead, it is the body’s natural response to excitement that can create temporary stress.
“The adrenergic stimulation is at its max: extreme high blood pressure, high heart rate, and adrenaline, cortisol, skyrocketing,” said Dan Atar, professor of cardiology at Oslo University Hospital. In rare cases, he added, this surge can contribute to the rupture of arterial plaque in vulnerable individuals, potentially leading to a heart attack.
Atar stressed that such events can occur in everyday situations as well, including physical exertion like shoveling snow. “It is in no way dangerous to watch a football game,” he said. “All this is physiologic. It’s not dangerous to be excited.”
Still, he acknowledged that combining emotional stress with alcohol, heat, and pre-existing conditions can increase risk for some viewers.
Doctors advise those at higher risk to continue prescribed medications, limit alcohol intake, avoid smoking, and watch for warning signs such as chest pain or irregular heartbeat.
“The key message is not to avoid enjoying the match, but to do so with moderation and awareness,” Santalucia said.
Health
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Health
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