Experiencing daytime sleepiness is something that is usually perceived as a minor inconvenience, but for older adults, it could be an early warning sign of Dementia. This neurodegenerative disease leads to the progressive decline of brain cells. This eventually

affects memory, cognition, and personality, making everyday tasks more difficult. As one of the fastest-growing neurological disorders across the world, dementia poses a significant health threat to ageing populations.

Is Dementia Linked To Poor Sleep?

For this study, researchers followed 445 older adults (average age 76) over three years, aiming to determine whether poor sleep could increase the risk of mild cognitive impairment (MCI), which often leads to dementia. At the start, none of the participants had MCI, but by the end of the study, 36 individuals had developed the condition.

The researchers discovered that participants with poor sleep were more likely to develop MCI compared to those who slept well. However, when depression symptoms were taken into account, the link between poor sleep and MCI became less pronounced, suggesting that while sleep issues are a concern, mental health also plays a key role in dementia risk.

To assess sleep quality, the Pittsburgh Sleep Quality Index (PSQI) was used, evaluating factors such as sleep duration, disturbances, and daytime alertness. Among these, "daytime dysfunction"—defined as excessive sleepiness and low energy during the day—was most strongly associated with an increased risk of MCI. Those experiencing daytime dysfunction were more than three times as likely to develop MCI as those who didn’t report such symptoms.

There are many types of dementia:

Dementia is not a specific disease. According to the Centers for Disease Control and Prevention (CDC), it is an overall term that describes a decline in mental ability that interferes with daily life. People with dementia often have symptoms like trouble remembering, thinking, or making everyday decisions. These symptoms tend to get worse over time.

Alzheimer’s disease is the most common type of dementia, and it mostly affects the elderly. Each form of dementia has a different cause. Though dementia mostly affects older adults, it is not a part of normal ageing. An estimated 6.7 million older adults have Alzheimer's disease in the United States. That number is expected to double by 2060, as per data from the CDC.

In 2022, 3.8% of men and 4.2% women in US were diagnosed with dementia. The percentage of people increase with age from 1.7% for those aged 65-74 to 13.1% for those aged 85 and older. Alzheimer's accounts for 60 to 80% of all dementia cases and it is most prevalent in California, Florida, and Texas, as these states have the highest number of people.

AlsAs the UK is going through its fifth heatwave this summer, even corporate employees working in air-conditioned offices are facing its brunt.

Many look forward to leaving the sweltering confines of their homes for some much-needed respite in air-conditioned workplaces. But not everyone is able to find relief.

AC Becomes Must-Have For Overheated London Offices

Temperatures reached 38.1°C at Kew Gardens in west London on August 13, making it the hottest day of the year so far and one of the hottest temperatures ever recorded in the UK.

The continually high mercury has exposed a bigger problem for office workers. While some older properties do not have air conditioning, others have systems that cannot withstand high temperatures and have broken down.

Those built in the last 20 to 30 years, as most of the buildings in Mayfair, might offer only cooling units and lack adequate mechanical cooling.

But those equipped with functioning air conditioners may get comfortable inside the office, cooler air does not remove the need to stay hydrated.

Also read: US July Heat Breaks 132-Year Record: UK, France Brace For 5th Heat Wave Of 2026

Sitting In Air-Conditioned Spaces For Long Hours Raises Dehydration Risk

Dehydration is often associated with excessive sweating and not drinking enough fluids. One may never comprehend how an office worker sitting inside a cool office could ever be at the risk of getting dehydrated.

But here's a grim truth: An office worker is at a much higher risk of dehydration due to various reasons. Dehydration occurs when the body loses more fluid than it takes in. During hot weather, sweating is one of the body's main ways of getting rid of excess heat.

Air conditioning lowers the surrounding temperature, which can affect how intensely you feel the heat. But if you have already been sweating during your commute, sitting in a cool room does not automatically replace what your body has lost.

Also read: UK, France Brace for Another Heatwave: How Hot Weather Can Affect Medicines

Additionally, not drinking enough fluids could further raise the risk as thirt is not always a reliable signal.

The UK Health Security Agency advises people to drink regularly throughout hot weather rather than waiting until they feel thirsty. It also recommends replacing fluids and electrolytes when sweating heavily.

The signs and symptoms of dehydration are also easy to miss as they don't present in traditional ways with sweating, dry mouth, dizziness, and more.

In an office, it shows up in a subtle manner. For example, a dull headache that gets dismissed as a side effect of prolonged gazing at screens, trouble concentrating that gets addressed with more caffeine and fatigue that is most likely to be neglected.

How To Stay Hydrated During A Heatwave?

One of the most straightforward ways to stay hydrated in an office during heatwaves is to drink water and other fluids regularly throughout the day.

UKHSA recommends drinking more fluids than usual in hot weather and considering rehydration drinks if you are sweating heavily.

The urge to gulp down multiple cups of coffee while working is persistent. But limiting excessive caffeine and alcohol can also help as they may contribute to fluid loss.

With repeated heatwaves becoming the top highlight of British summers, staying cool and staying hydrated need to go hand in hand in order to avoid getting dehydrated.

A recent report by the Comptroller and Auditor General of India (CAG) found E. coli bacteria in drinking water from water coolers at several major railway stations across the country.

The report also flagged unhygienic conditions in railway washrooms and other passenger amenities. The audit found that 458 of the 512 stations examined — more than 89 per cent — did not meet prescribed standards for minimum essential amenities.

"Bacteriological analysis of drinking water was not carried out at 59 stations over six zones," the CAG said in its report, Passenger Amenities and Sanitation at Non-Suburban Railway Stations in Indian Railways, tabled in Parliament on August 12.

Water samples from coolers tested positive for E. coli at two stations in Southern Railway, one in South Central Railway, four in Central Railway and one in Eastern Railway.

The report also found total coliform bacteria, including E. coli, in tap water samples collected from platforms at several stations during 2022-23 and 2023-24.

Following the findings, Railway Minister Ashwini Vaishnaw has directed immediate steps to improve the safety of drinking water at stations.

The Railway Ministry said a new "tank-to-tap" filtration system would be installed at around 20,000 locations, including water coolers. The measures include replacing water tanks, regular water-quality testing at source and outlet points, centralized monitoring, accountability, and scheduled cleaning and maintenance of storage tanks.

Also read: Does Sunscreen Really Raise Skin Cancer Risk? What The 470,000-Person Study Found

What Is E. Coli?

Escherichia coli, commonly known as E. coli, is a group of bacteria that normally lives in the intestines of humans and animals.

HealthandMe spoke to Dr. Pawan Kumar Goyal, Senior Director - Internal Medicine, Fortis Hospital, Shalimar Bagh, about E. Coli infection, its symptoms and how to prevent it.

Dr. Pawan Kumar Goyal explains, "Most E. coli strains are harmless and are part of the normal bacteria present in the gut. However, some strains can cause infections, particularly when they enter the body through contaminated food or water."

What Happens During an E. Coli Infection?

Dr. Goyal says, "The presence of E. coli in drinking water is an important indication of faecal contamination. It suggests that the water may have come into contact with human or animal waste and may contain other disease causing organisms as well."

Harmful E. coli strains most commonly affect the digestive system, causing diarrhea, abdominal pain, and gastroenteritis. Some strains can also cause urinary tract infections.

Certain strains produce Shiga toxin, which can cause serious complications, including kidney damage, particularly in children and older adults.

Common Signs of E. Coli Infection

Symptoms can vary depending on the strain and the part of the body affected. Dr. Goyal says the common gastrointestinal symptoms include:

• Diarrhoea, which may sometimes be severe or contain blood
• Abdominal cramps and pain
• Nausea and vomiting
• Fever and weakness
• Reduced appetite

Watery diarrhea is often one of the earliest symptoms of E. coli infection of the gastrointestinal tract.

Read More: Amid Cyclospora, Salmonella Outbreaks, US FDA Issues Guidance on Ready-to-Eat Produce

Treatment For E. Coli

Talking about the treatment for E. Coli infection, Dr. Goyal explains, "Treatment depends on the strain of E. coli and the severity of infection. Adequate fluids and electrolytes are important in most cases. Antibiotics are not appropriate for every E. coli infection and should only be taken following medical assessment, as certain infections may worsen with inappropriate antibiotic use."

Not every E. Coli infection turns severe. However, certain symptoms must be addressed clinically as they could lead to complications.

Dr. Goyal says, "For most healthy adults, the infection may settle with appropriate fluid replacement and supportive care. However, severe diarrhoea can cause dehydration, which can become dangerous if not treated in time."

The expert also spoke about serious complications from E. Coli infection that could lead to renal damage.

He says, "Certain E. coli strains can also cause haemolytic uraemic syndrome, a serious complication that can affect the kidneys.

The expert also said that young children, older adults and people with weakened immunity may be at greater risk of complications.

He adds, "Persistent diarrhoea, blood in stools, high fever, reduced urination, dizziness or signs of significant dehydration require prompt medical attention. Early recognition and appropriate treatment can prevent complications."

How To Protect Yourself From E. Coli?

E. coli can spread through contaminated food, water and fecal matter. Basic hygiene and safe food practices can help reduce the risk.

Dr Goyal recommends, "Prevention depends largely on maintaining good hygiene and ensuring access to safe drinking water. Hands should be washed thoroughly before eating and after using the toilet. Water from an uncertain source should be avoided, and properly treated or boiled water should be used where safety is in doubt."

Other preventive measures include:

Maintain Hand Hygiene: Wash your hands with soap and water for at least 20 seconds before eating or cooking and after using the toilet, changing diapers or handling animals.

Practice Safe Food Handling: Keep raw meat separate from ready-to-eat foods. Use separate utensils and cutting boards, and clean kitchen surfaces thoroughly after handling raw meat.

Cook Food Thoroughly: Cook ground meat to at least 160°F (71°C) and poultry to 165°F (74°C). A food thermometer can help ensure food reaches a safe temperature.

Wash Fruits and Vegetables: Wash produce under running water before eating, even if you plan to peel it.

Choose Safe Drinking Water: Drink pasteurized milk and juices and use boiled or treated water. Avoid unpasteurised products and untreated water, which can carry harmful E. coli strains.

Tennis legend Novak Djokovic has opened up about a longstanding health issue he has been dealing with for years.

At the Cincinnati Open, the Serbian, who holds the all-time men's record of 428 weeks as world No. 1 in singles, struggled physically throughout his second-round match.

The 39-year-old was seen crouching on all fours between points, required a medical timeout and appeared to vomit into towels as extreme heat and humidity took a toll.

The 24-time Grand Slam champion suffered a surprising second-round defeat, losing to Argentina's Thiago Agustín Tirante 2-6, 6-4, 6-4.

What Health Issue Does Novak Djokovic Have?

Following the defeat, Djokovic revealed that he has been dealing with a longstanding health condition that becomes particularly difficult to manage in hot and humid conditions.

"It's because of a health issue I have," Djokovic told reporters after the match. "I've been dealing with it for many years now. It causes me a lot of problems, especially when there's a lot of humidity and heat."

Djokovic said he had anticipated difficult conditions in Cincinnati, but the combination of heat, humidity, nerves and other factors ultimately made the situation worse during his match against Tirante.

His physical struggles also raised questions about his future at the Cincinnati Open. Asked whether he planned to return to the tournament in 2027, Djokovic gave an uncertain response.

"I certainly hope so, but unfortunately, at this point it seems more likely that I won't. However, we'll see what the future holds."

Novak Djokovic's Previous Health Issues and Injuries

Djokovic has dealt with several injuries and health challenges throughout his career.

• Respiratory issues: Before 2010, Djokovic faced heat exhaustion, breathing difficulties and physical collapses. He later changed his diet after identifying gluten and dairy intolerance.

• Elbow injury: Chronic right elbow problems led to surgery in 2018.

• Abdominal tear: He played through an abdominal tear to win the 2021 Australian Open.

• Hamstring injury: He battled a left hamstring injury during his 2023 Australian Open title run.

• Knee injury: A torn meniscus forced him to withdraw from the 2024 French Open.

Djokovic on the Physical Demands of Ageing

In 2023, Djokovic acknowledged that his body was beginning to feel the effects of a long career, although he still felt he had fuel left in the tank.

"I am being completely honest with you guys. I have asked this question also, but it's not like I think about it all the time.

The desire is still there, but things can change quickly – I am 36, I've been a pro for 20 years."

He said he did not view age as a decisive factor, instead focusing on his overall physical condition and whether he continued to enjoy playing.

Age can affect tennis performance through changes such as reduced muscle mass, slower recovery and lower aerobic capacity, which can also increase injury risk. However, modern sports science and tactics can help players remain competitive as they age.

Research suggests that people who regularly play tennis may add nearly 10 years to their lives, potentially outperforming the longevity gains associated with several other sports.

"Tennis is a sport that is unique because people of all ages play it, from age two to 92 or older, and that makes it accessible to a lot of people," Dr. Melissa Leber, director of emergency department sports medicine at Mount Sinai Health System, told the New York Post.