Health
Health Experts Warn of Winter Dehydration Risks
Health experts are cautioning that dehydration is often overlooked during winter, putting people at risk of fatigue, brain fog, and even serious kidney problems. While most associate dehydration with hot summer months, specialists say maintaining proper fluid intake is equally important when temperatures drop.
Yadira Santiago Banuelos, a clinical assistant professor and practising family nurse practitioner at Purdue University’s School of Nursing, emphasised that hydration affects a wide range of bodily functions, from skin health to immunity. “When we’re well hydrated on the inside, we’re also better hydrated on the outside, helping with dry skin,” Banuelos said. “It also helps lubricate between our joints, which we definitely want when we’re out shovelling snow.”
Hydration also plays a critical role in supporting the immune system during peak cold and flu season. Banuelos explained, “It helps provide that moist mucous membrane layer that helps prevent viruses, bacteria, things like that throughout the winter.”
Despite these benefits, winter dehydration often goes unnoticed. People tend to underestimate their risk because they are less likely to feel thirsty. Banuelos noted that the body’s thirst response decreases by about 40 per cent in colder months, meaning individuals may already be dehydrated before recognising their need for fluids.
Cold weather also contributes in subtle ways. Dry air pulls moisture from the skin, urination frequency tends to increase, and sweat continues to occur even if it evaporates quickly. “We still sweat, but oftentimes we don’t notice it as much because it tends to evaporate a lot quicker with the cold,” Banuelos said.
Dehydration can lead to a range of symptoms depending on severity. Early signs include dizziness, dry skin, chapped lips, fatigue, and a foggy feeling. If prolonged, it can result in more serious complications, including kidney problems such as kidney stones or even kidney failure.
Experts advise that the widely cited “eight cups a day” guideline may not be sufficient for everyone. Banuelos explained that men typically need about 13 cups (approximately three litres) of water daily, while women require around nine cups (two litres). Fluid needs can increase during pregnancy or breastfeeding, with women sometimes needing intake levels similar to men.
Maintaining adequate hydration in winter may require more conscious effort. Experts suggest drinking water regularly throughout the day, incorporating hydrating foods such as fruits and vegetables, and paying attention to signs of dryness or fatigue. Simple habits such as carrying a reusable water bottle, choosing warm fluids like herbal teas, and monitoring urine color can help ensure proper hydration.
With cold temperatures and dry indoor air contributing to moisture loss, health professionals emphasise that staying hydrated is vital not only for comfort but also for overall health. Winter should not be a season of neglect when it comes to water intake, and proactive hydration can help protect joints, skin, kidneys, and immunity during the colder months.
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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