Irregular Sleep, Drinking Caffeine After 3PM Could Raise Your Risk Of Heart Attack And Stroke

Updated Dec 1, 2024 | 03:01 PM IST

SummaryConsistency in sleep is more crucial for heart health than simply sleeping enough hours.
Irregular Sleep, Drinking Caffeine After 3PM Could Raise Your Risk Of Heart Attack And Stroke

Irregular Sleep, Drinking Caffeine After 3PM Could Raise Your Risk Of Heart Attack And Stroke

I’ve always struggled with inconsistent sleep, staying up late and waking up at different times each day. My love for coffee was also on an all-time high with trying all the season specials. But it is only recently, I learned how this irregular sleep pattern and caffeine could increase my risk of heart attack and stroke. Now, I’m prioritizing a consistent sleep schedule and cutting out caffeine after 3 PM to protect my heart.

A new, shocking study shows that irregular sleep patterns can greatly increase the risk of heart attack and stroke. But that's not all: the timing of your caffeine intake could also play a critical role in your cardiovascular health. If you are struggling with inconsistent sleep patterns and regularly sipping on caffeinated beverages late in the day, you may be unknowingly putting yourself at risk for serious heart-related issues.

For most people, sleep is something of a given and we often only consider ourselves as long as we get our required seven to nine hours. However, according to a recent study conducted by researchers at the Children's Hospital of Eastern Ontario, it may not be that long after all. The study, which included more than 72,000 participants, found that people with irregular sleep patterns—those who fall asleep and wake up at vastly different times each day—face a 26% higher risk of experiencing a heart attack or stroke. This increased risk persisted even for those who managed to get enough sleep. The study followed up participants for eight years to track heart events such as heart attacks, strokes, and heart failure. The conclusions were clear: irregular sleep, even if it's sufficient in duration, is a major cardiovascular risk factor.

The researchers found that those whose sleep patterns were highly irregular had a significantly greater chance of life-threatening heart issues. The more erratic your sleep schedule, the greater the risk, regardless of how many hours you sleep. In fact, people with irregular sleep schedules showed worse cardiovascular health outcomes, including higher rates of high blood pressure, elevated stress hormones, and poor blood sugar and cholesterol management.

Senior scientist Dr. Jean-Philippe Chaput said "sleep regularity may be more relevant than sufficient sleep duration in modulating MACE [major adverse cardiovascular event] risk." In the study, it shows that our bodies are comfortable with consistency, and a varied sleep schedule may interfere with other processes that keep us healthy, especially the heart.

Is it Caffeine After 3 PM Causing Sleeplessness?

Another daily habit that may be putting your heart at risk is caffeine consumption after 3 PM. According to Dr. Chaput, the experts emphasize the need for a healthy sleep schedule and avoiding caffeine late in the day. Caffeine can stay in your blood for up to eight hours, and its consumption later in the afternoon can disrupt your sleep cycle.

Consistent, good-quality sleep is necessary for maintaining healthy cardiovascular function, and the disruption of this by late-day caffeine intake exacerbates the risks posed by irregular sleep. When you drink coffee, tea, or other caffeinated beverages too late, the stimulant effect on your nervous system makes it harder to fall asleep at a regular time. This can lead to inconsistent sleep patterns, which, as we have seen, can be harmful to heart health.

Dr Chaput insists that humans need to adopt practices that contribute to regularized sleep habits. This can be attained by establishing a proper sleeping and waking schedule, eliminating afternoon intake of stimulants such as caffeine, and making your body clock coincide with the lifestyle one leads.

How Does Poor Sleep Affect Heart Health?

According to the experts, the disturbance due to irregular sleep patterns impacts more than one physiological process involved in the maintenance of the healthy heart. For example, poor sleep can be associated with increased inflammation of the body, weakened immunity, and altered regulation of blood sugar and cholesterol, all of which contribute to increased blood pressure and weakening endothelial function, both associated with an increased risk for cardiovascular diseases. Sleep also plays a very important role in regulating stress hormones. Poor or disturbed sleep results in increased levels of cortisol, the stress hormone, which increases blood pressure and can have negative impacts on cardiovascular health over time.

Scientists hypothesize that these disturbances trigger a series of negative effects that enhance the risk of developing chronic heart conditions, including hypertension, atherosclerosis, or even heart failure.

Tips to Protect Your Heart and Improve Your Sleep

In order to protect your heart, experts recommend several proactive measures to improve your sleep patterns and lifestyle. First, maintain a regular sleep schedule whereby you go to bed and wake up at the same time every day, including weekends. Consistency will keep your body's internal clock in check.

Along with regulating your sleep, paying attention to your caffeine habits is just as important. To reduce your risk of heart disease and stroke, experts suggest avoiding caffeine after 3 PM. If you’re sensitive to caffeine, this rule becomes even more critical.

In addition, the introduction of stress-reducing activities like yoga or mindfulness can also be beneficial to lower cortisol levels, and therefore both sleep and heart health can improve. A diet rich in antioxidants, healthy fats, and low on processed sugars also helps maintain cholesterol levels and reduce inflammation.

Does Your Sleep Environment Also Has A Role To Play

Apart from the timing of caffeine and your sleep schedule, another very overlooked factor is the quality of your sleep environment. Scientists have long known that the environment in which you sleep has a huge impact on the quality of your rest. Poor quality of sleep, even if your sleep schedule is regular, can cause health risks that are very much the same as those that arise from irregular sleep patterns.

Here’s an additional tip: make sure your bedroom is conducive to restful sleep. This means keeping your room dark, quiet, and cool. A temperature of around 65°F (18°C) is ideal for most people. Consider investing in a comfortable mattress and pillows, and avoid screen time at least 30 minutes before bed to allow your brain to unwind.

Irregular sleep, in association with taking caffeine in late parts of the day, can risk heart attack and stroke, but a simple maintenance of a sleep schedule, the reduction of consumption of afternoon caffeine, and sleep environmental awareness can definitely safeguard one's heart along with total health.

Your sleep is more than just a time for rest; it's a vital component of your long-term health, and maintaining consistency in your sleep habits is one of the best things you can do for your heart.

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Unique Symptoms Of Norovirus In 2025 And How Long Does The Infection Last?

Updated Dec 12, 2025 | 12:11 AM IST

SummaryA norovirus outbreak on an AIDA cruise has infected over 100 people, marking the CDC’s 21st cruise-related incident this year. Cases are rising earlier than usual across the U.S., with outbreaks more than doubling. The highly contagious “rib-cracking” virus causes explosive vomiting, rapid dehydration, and typically lasts one to three days.
Unique Symptoms Of Norovirus In 2025 And How Long Does The Infection Last?

Credits: Canva

Recently the news of Norovirus outbreak in an AIDA cruise that has infected more than 100 guests and crew on board made news. This is the 21st outbreak, as confirmed by the Centers for Disease Control and Prevention (CDC). This case has brought back memories from the Royal Caribbean Cruise outbreak, where 94 out of 1,874 and 4 crew members also were infected by Norovirus.

This virus is also known as the 'rib-cracking' winter virus, which sets it apart from rest of the winter viruses. People who have been sickened by this contagious virus are vomiting explosively, which may make the sufferers to experience a cracking in their ribs, which is where it gets its name 'rib-cracking' winter virus.

What Is Norovirus? What Makes It So Unique?

The virus typically spikes after the holidays, when families gather indoors. However, new data from the Centers for CDC shows this year’s surge has arrived weeks ahead of schedule, and experts say there’s no obvious explanation yet.

According to the CDC, 12.5 percent of norovirus tests came back positive during the week of November 22, nearly identical to the 13 percent positivity rate the week before. Compared to two weeks earlier, infections have jumped by about 25 percent. But the real number of cases is likely far higher, as most people with norovirus never get tested.

Between August 1 and November 13, health officials recorded 153 norovirus outbreaks, more than double last year’s 69 during the same period, and far above the 65 reported in 2023.

The CDC estimates the U.S. sees around 2,500 outbreaks every year. An outbreak is recorded when two or more people fall ill from a suspected or confirmed shared source.

On cruise ships, which are closely monitored by federal agencies, outbreaks have also been climbing. The AIDAdiva, a German vessel currently on a long global route, recently reported a spike in cases. In a statement to USA TODAY, AIDA Cruises said it has increased hygiene measures on board and that infections are already declining.

“Seasonal illness peaks between November and April, and the AIDAdiva report reflects what we’re seeing on land,” the cruise line said.

Why Norovirus Hits So Hard

Norovirus infects roughly 21 million Americans every year and sends about 2 million to hospitals or clinics. It spreads easily through contaminated food, surfaces, shared utensils, or direct contact with an infected person. Even a tiny amount of virus can trigger illness.

Symptoms usually appear within 12 to 48 hours and include nausea, vomiting, diarrhea, stomach cramps, and sometimes fever and chills. The biggest danger is dehydration, which can set in quickly. Severe fluid loss can lead to low blood pressure, reduced organ perfusion, electrolyte imbalances, and in extreme cases, seizures or fainting.

The virus contributes to about 900 deaths in the U.S. annually, mostly among older adults.

Doctors emphasize that hand sanitizers don’t reliably kill norovirus. Frequent handwashing with soap and water is the best protection.

The season’s lowest positivity rate was recorded in early August at 6.5 percent. But with holiday travel and gatherings underway, health officials warn infections are likely to rise.

What Are The Symptoms Of Norovirus And How Long Do They Last?

  • Nausea
  • Vomiting
  • Stomach pain or cramps
  • Watery or loose diarrhea
  • Feeling ill
  • Low-grade fever
  • Muscle pain

The symptoms usually begin 12 to 48 hours after your first exposure to the virus and could last from 1 to 3 days. You can, however, continue to shed virus in your stool for several week after your recovery. The shedding could go up for months if you have another medical condition.

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Connection Between Migration And Pollution: People Are Leaving City To Be Away From Delhi's Toxic Air

Updated Dec 11, 2025 | 10:00 PM IST

SummaryDelhi’s air quality has slipped back into the “very poor” category, prompting many residents to leave or consider relocating. People report breathlessness, fatigue and worsening health during winter pollution spikes. Growing numbers are moving to cleaner cities, supported by surveys showing rising migration intent as toxic air threatens life expectancy and overall well-being.
Connection Between Migration And Pollution: People Are Leaving City To Be Away From Delhi's Toxic Air

Credits: Canva

Delhi woke up again to a thick layer of smog, with Delhi's AQI hovering over 300 on the Air Quality Index on Thursday morning under "very poor" category. After a long nine-day wait, city's AQI had slipped under "poor" category on Tuesday, but it is again back on the "very poor" category, while on Wednesday, there were strong winds that dispersed the pollutants. Yet the condition of the air quality remains bad.

As a result of this many people are leaving the city, or have at least considered leaving the city.

"I Felt Breathless And Constantly Fatigued"

Nikita Singh, 31, who runs a remote PR boutique agency was living in Delhi on and off for two years because it was two years back when she struggled to breathe during Delhi winters. "The pollution levels were so extreme that I felt breathless and constantly fatigued. That was the first time I seriously questioned whether I could continue living here long-term," she says.

For the first two years, she kept "oscillating". "I would stay in Delhi for work during peak months, then leave when pollution became unbearable, especially from November to January. Every return felt heavier. I had my eyes burning, headaches, chest tightness and a general feeling of 'I cannot do this forever'."

She has now permanent moved away from Delhi to Jodhpur, in Rajasthan, where she works remotely. However, it has not been easy on her. "Emotionally, it was tough because Delhi had become familiar, and my life and work circle were mostly based there," she says. However, thanks to her fully remote work and that fact that she had decided to prioritize her health, she was able to make the move.

She says that Jodhpur offers the cleaner air which she "never felt in Delhi". Her decision to move also came with her family uprooting from Delhi. "My family and I shifted together. AQI was a major trigger. We realized we could not keep exposing ourselves to those levels of pollution year after year," she reveals.

Migration And Pollution: More Delhiites Are Considering To Move Out Of The City

She is not alone, Vikash Makkar, a freelance linguist specialist and a journalist, who had been living in Delhi from the last 12 years, moved back to his hometown in Jamshedpur. "Since October with an unplanned journey, I moved to my hometown and have been living there. It is quite relaxed here as compared to Delhi's ongoing pollution crisis that I had faced," he shares.

29-year-old Riya Baibhawi also uprooted from the city. She had been living in Delhi from last 5 years. She is currently living in Ludhiana, Punjab, and her decision to leave city is also affected by the pollution. Though, it was not easy for her. "It was very tough because it was very difficult to find career opportunities with competitive salaries outside Delhi-NCR. It also required a cut down of my social life, which adversely affected my mental health," she says. She shares that one of her friends, who had been living in Noida for the last 20 years had also moved out as pollution exacerbated her asthma.

Another family, who have been living in Delhi's Karol Bagh for more than two decades now are considering moving out of Delhi. "They are looking for properties outside Delhi where air is cleaner," shares their 26-year-old daughter who now lives in her marital home in Noida.

As per a survey by a consumer insights platform Smytten PulseAI, about 34.6% of the residents surveyed in Delhi NCR have considered to move out of the city due to worsening air. A 2023 study published in the International Journal of Environmental Research and Public Health shows that if the level of PM2.5 increases by 10µg/m3, migrants coming into the city will be reduced by 21.2%. While migration in the city has been ongoing, pollution does show some strains of people moving out of the city.

As per the Air Quality Life Index released by the Energy Policy Institute at the University of Chicago (EPIC), the fine particulate matter or PM2.5 in air will shorten an average Indian's life expectancy by 5.3 years, and in Delhi, it could shorten a person's life span by 11.9 years. However, the Union government has said in the parliament that there is "no conclusive national data to establish a direct correlation between deaths or diseases occurring exclusively due to air pollution". This statement comes at a time when doctors themselves noted a surge in cases due to pollution and have urged people to leave the cities.

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Fact Check: Does Japan Have A Fat Law?

Updated Dec 10, 2025 | 08:30 PM IST

SummaryJapan’s so-called “fat law” is widely misunderstood, thanks to sensational headlines and mistranslations. Japan does not fine individuals for being overweight. The Metabo Law screens adults for metabolic risks and holds employers accountable for offering support. It emphasizes early detection, counselling and workplace health, not punishment, and has reshaped Japan’s wellness culture.
Fact Check: Does Japan Have A Fat Law?

Credits: Canva

The internet is obsessing with the idea that Japan has a fat law, it fines people for being "fat". Talk about sensational headlines, mistranslations, and social media exaggerations. But what does Japan's so-called 'fat law' actually say? Does it really change anything?

Health and Me did a closer fact check on Japan's Fat Law, and here is what we found.

Japan's Metabo Law: What It Really Means?

In 2008, the Japanese Ministry of Health, Labour and Welfare introduced the Metabolic Syndrome Countermeasures Promotion Law, which was popularly nicknamed the 'Metabo Law'. the word 'metabo' comes from metabolic syndrome, a cluster of high-risk conditions that include elevated blood pressure, high blood sugar, abnormal cholesterol, and excess fat around the waist. If left untreated, this could increase the risk of heart attacks, stroke and diabetes.

The law's main focus is on identifying these risks as early as possible. As part of Japan's long-standing annual health check tradition, about 50 to 56 million adults aged 40 to 74 undergo this mandatory waist measurements every year. The waistline thresholds are:

  • 85cm for men
  • 90cm for women

While the numbers are not arbitrary, they match the International Diabetes Federation's guidelines used to screen metabolic risks.

Is It Illegal To Be Overweight In Japan?

The Times-Union fact check confirms: "Japanese citizens cannot be fined or imprisoned for being overweight". RosePlus Japan also reports that the term "fat tax is a mistranslation and that "it is not illegal to be fat in Japan".

The law does not:

  • Fine individuals for their weight
  • Send people to jail for being overweight
  • Deport or deny visas based on size
  • Ban obese people

How Does The Law Actually Work?

The law basically shifts the responsibility away from individuals to governments and employers.

Annual measurement: Employers and local authorities measure the waistlines of eligible adults.

If someone exceeds the limit:

  • They are offered counseling, health guidance, and follow-ups.
  • After three months, progress is reviewed.
  • After six months, they may receive additional health education.

No individual penalties: There is no fine for not losing weight.

Employer penalties:

  • If a company fails to reduce the percentage of employees at risk, it may face increased contributions to national healthcare funds.
  • Companies like NEC previously estimated potential fines of up to $19 million for not meeting targets

This structure makes the Metabo Law more of a workplace wellness mandate than a personal weight regulation.

Lost In Translation

Much of the misunderstanding comes from how Japanese concepts were translated in English. With the word "law" being reported internationally, it implied a strict legal prohibition.

"Metabo" was incorrectly equated was being "fat", losing its medical meaning.

Was The Law Successful?

  • Japan already had one of the lowest obesity rates in the world, around 3.5 percent in 2009, compared to over 30 percent in many Western countries.
  • Life expectancy in Japan has remained among the highest globally.
  • However, obesity rates among men (based on BMI 25+) reportedly continued rising, reaching 31.7 percent in 2022 according to The Japan Times, as cited in the HR Digest analysis

However, there have been things that changed since 2008. This includes companies offering nutrition workshops, physical activity support, health check programs for employees and their families. The annual health checks are now more structured. People flagged for metabolic syndrome were connected with counselling and monitoring, which can reduce long-term medical costs. The conversation has now also shifted towards body autonomy, public health and role of employers in personal wellness.

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