health and wellness
Heat and cold as health hazards
Research shows that both heat waves and cold temperatures significantly stress the cardiovascular system, impacting health amid current climate and energy crises.
Last Updated on December 28, 2024 by Daily News Staff
Newswise — Both hot and cold environments trigger a stress response in the human body and can lead to cardiovascular problems. Physiologist Justin Lawley from the Department of Sport Science at the University of Innsbruck and colleagues have recently investigated both factors in scientific studies. The results, which were published in the Journals Scientific Reports and Experimental Physiology, are especially interesting in light of the current multiple global crises.
The climate and energy crises are currently among the greatest challenges of our time and are having a direct physical effect on people’s health. For example, the climate crisis is causing more frequent, longer and more intense heat waves, which are responsible for more deaths than natural disasters. Moreover, the energy crisis is causing a rise in energy costs and forcing many households to heat their homes less often or not at all.
The physiological responses to a simulated heat wave and cold ambient temperatures have now been investigated by Justin Lawley, together with his research group, the Laboratory of Exercise and Environmental Physiology, and international scientists in two studies – the focus was on the cardiovascular system. “In both studies, we replicated real-world environmental temperatures the body might be exposed to and were able to show physiological responses that could help explain known seasonal variations in cardiovascular deaths,” explains Lawley.
Heat study
As part of the Horizon 2020 Heat Shield project, Lawley’s group collaborated with colleagues from Slovenia to examine how heat waves affect the health of industrial workers. Seven male participants spent nine consecutive regular workdays in a controlled laboratory setting.
On the first and last three days, normal summer temperatures for Central European conditions ranged from 25.1 to 25.7 degrees during work and 21.8 to 22.8 degrees during rest periods. Days four through six represented the heat wave; during this period, researchers created ambient temperatures between 35.2 and 35.8 degrees during work periods and 25.5 to 27.1 degrees during rest periods including while sleeping at night. During the entire study, participants completed daily tasks to simulate typical industrial work.
“We used a protocol in this study that simulates current heat wave conditions in combination with orthostatic stress, which means changing posture, to determine cardiovascular and thermoregulatory stress in industrial workers,” Lawley describes. The results show that even relatively mild heat waves cause an increase in core and skin temperatures and an increase in skin blood flow. While these physiological reactions help the body from overheating at rest, during standing the body must now defend both internal temperature and maintain blood pressure to prevent fainting, which puts an extra strain on the cardiovascular system.
Interestingly, many of these responses persisted after the heat wave was over, suggesting a residual effect of the heat wave. “These responses reflect the stress on the cardiovascular system that industrial workers face during heat waves, which can lead to heat illness, fainting and even potentially death due to accidents or serious medical complications in persons with underlying cardiovascular disease,” Lawley points out.
Cold study
In another study, Lawley, along with a team of eleven researchers, examined the impact of mild cold exposure on the cardiovascular system, with a specific focus on what mechanisms are responsible for the increase in blood pressure. In addition to researchers from Innsbruck, scientists from Great Britain and Canada were also involved.
Since preventing a rise in blood pressure in the cold is important, the study aimed to examine if the rise in vessel resistance (i.e. vasoconstriction) is due to a change in blood flow in the skeletal muscles or simply the skin. In a laboratory at the Department of Sport Science at the University of Innsbruck, the researchers cooled the skin temperature of 34 test subjects from a normal 32 to 34 degrees to about 27 degrees with ten degrees cold air – on one occasion the entire body was cooled, on another only the face was cooled.
“We observed that when the entire surface of the body is cooled, blood pressure increases mainly due to an increase in vascular resistance of the skin, although there was also a slight reflex increase in resistance of the blood vessels inside the skeletal muscle. However, importantly, when only the face was cooled, we saw a very similar increase in blood pressure that was due to a reflex increase in vascular resistance of the skin throughout the whole body,” Lawley describes.
Thus, the team was able to show that the mechanism(s) responsible for the rise in blood pressure during cold exposure depends on which parts of the body are cold. These data are important to educate the population about preventing the potential negative consequences of cold exposure because contrary to the perception of many, cold is even more dangerous to the body than heat.
“It doesn’t take sub-zero temperatures – as you might think – to cause serious reactions in the body, which will become common for many people unable to heat their homes during the energy crisis. While people typically know to wear warm clothing to protect the skin of their body, arms and legs, we were able to show that protecting the face is equally important even in a mild ambient temperature of ten degrees,” Lawley continues.
Extreme effects
Both studies show that climatic conditions can have extreme effects on our cardiovascular system. While negative health aspects triggered by heat waves will increase due to the climate crisis, it is particularly surprising that even cold temperatures around 10 degrees can have significant negative effects on our cardiovascular system even in young people who were part of these studies. Future studies extending these findings to our ageing population and those with pre-existing medical conditions will certainly help mitigate the risk of these new environmental challenges.
Link: https://www.nature.com/articles/s41598-022-24216-3
Source: University of Innsbruck
Our Lifestyle section on STM Daily News is a hub of inspiration and practical information, offering a range of articles that touch on various aspects of daily life. From tips on family finances to guides for maintaining health and wellness, we strive to empower our readers with knowledge and resources to enhance their lifestyles. Whether you’re seeking outdoor activity ideas, fashion trends, or travel recommendations, our lifestyle section has got you covered. Visit us today at https://stmdailynews.com/category/lifestyle/ and embark on a journey of discovery and self-improvement.
Lifestyle
Women are at a higher risk of dying from heart disease − in part because doctors don’t take major sex and gender differences into account
Heart disease impacts women differently than men due to genetic and gender biases in healthcare. Awareness and improved treatment approaches are essential for better outcomes.
Last Updated on April 20, 2026 by Daily News Staff
Amy Huebschmann, University of Colorado Anschutz Medical Campus and Judith Regensteiner, University of Colorado Anschutz Medical Campus
A simple difference in the genetic code – two X chromosomes versus one X chromosome and one Y chromosome – can lead to major differences in heart disease. It turns out that these genetic differences influence more than just sex organs and sex assigned at birth – they fundamentally alter the way cardiovascular disease develops and presents.
While sex influences the mechanisms behind how cardiovascular disease develops, gender plays a role in how healthcare providers recognize and manage it. Sex refers to biological characteristics such as genetics, hormones, anatomy and physiology, while gender refers to social, psychological, and cultural constructs. Women are more likely to die after a first heart attack or stroke than men. Women are also more likely to have additional or different heart attack symptoms that go beyond chest pain, such as nausea, jaw pain, dizziness and fatigue. It is often difficult to fully disentangle the influences of sex on cardiovascular disease outcomes versus the influences of gender.
While women who haven’t entered menopause have a lower risk of cardiovascular disease than men, their cardiovascular risk accelerates dramatically after menopause. In addition, if a woman has Type 2 diabetes, her risk of heart attack accelerates to be equivalent to that of men, even if the woman with diabetes has not yet gone through menopause. Further data is needed to better understand differences in cardiovascular disease risk among nonbinary and transgender patients.
Despite these differences, one key thing is the same: Heart attack, stroke and other forms of cardiovascular disease are the leading cause of death for all people, regardless of sex or gender.
We are researchers who study women’s health and the way cardiovascular disease develops and presents differently in women and men. Our work has identified a crucial need to update medical guidelines with more sex-specific approaches to diagnosis and treatment in order to improve health outcomes for all.
Gender differences in heart disease
The reasons behind sex and gender differences in cardiovascular disease are not completely known. Nor are the distinct biological effects of sex, such as hormonal and genetic factors, versus gender, such as social, cultural and psychological factors, clearly differentiated.
What researchers do know is that the accumulated evidence of what good heart care should look like for women compared with men has as many holes in it as Swiss cheese. Medical evidence for treating cardiovascular disease often comes from trials that excluded women, since women for the most part weren’t included in scientific research until the NIH Revitalization Act of 1993. For example, current guidelines to treat cardiovascular risk factors such as high blood pressure are based primarily on data from men. This is despite evidence that differences in the way that cardiovascular disease develops leads women to experience cardiovascular disease differently.
In addition to sex differences, implicit gender biases among providers and gendered social norms among patients lead clinicians to underestimate the risk of cardiac events in women compared with men. These biases play a role in why women are more likely than men to die from cardiac events. For example, for patients with symptoms that are borderline for cardiovascular disease, clinicians tend to be more aggressive in ordering artery imaging for men than for women. One study linked this tendency to order less aggressive tests for women partly to a gender bias that men are more open than women to taking risks.
In a study of about 3,000 patients with a recent heart attack, women were less likely than men to think that their heart attack symptoms were due to a heart condition. Additionally, most women do not know that cardiovascular disease is the No. 1 cause of death among women. Overall, women’s misperceptions of their own risk may hold them back from getting a doctor to check out possible symptoms of a heart attack or stroke.
These issues are further exacerbated for women of color. Lack of access to health care and additional challenges drive health disparities among underrepresented racial and ethnic minority populations.
Sex difference in heart disease
Cardiovascular disease physically looks different for women and men, specifically in the plaque buildup on artery walls that contributes to illness.
Women have fewer cholesterol crystals and fewer calcium deposits in their artery plaque than men do. Physiological differences in the smallest blood vessels feeding the heart also play a role in cardiovascular outcomes.
Women are more likely than men to have cardiovascular disease that presents as multiple narrowed arteries that are not fully “clogged,” resulting in chest pain because blood flow can’t ratchet up enough to meet higher oxygen demands with exercise, much like a low-flow showerhead. When chest pain presents in this way, doctors call this condition ischemia and no obstructive coronary arteries. In comparison, men are more likely to have a “clogged” artery in a concentrated area that can be opened up with a stent or with cardiac bypass surgery. Options for multiple narrowed arteries have lagged behind treatment options for typical “clogged” arteries, which puts women at a disadvantage.
In addition, in the early stages of a heart attack, the levels of blood markers that indicate damage to the heart are lower in women than in men. This can lead to more missed diagnoses of coronary artery disease in women compared with men.
The reasons for these differences are not fully clear. Some potential factors include differences in artery plaque composition that make men’s plaque more likely to rupture or burst and women’s plaque more likely to erode. Women also have lower heart mass and smaller arteries than men even after taking body size into consideration.
Reducing sex disparities
Too often, women with symptoms of cardiovascular disease are sent away from doctor’s offices because of gender biases that “women don’t get heart disease.”
Considering how symptoms of cardiovascular disease vary by sex and gender could help doctors better care for all patients.
One way that the rubber is meeting the road is with regard to better approaches to diagnosing heart attacks for women and men. Specifically, when diagnosing heart attacks, using sex-specific cutoffs for blood tests that measure heart damage – called high-sensitivity troponin tests – can improve their accuracy, decreasing missed diagnoses, or false negatives, in women while also decreasing overdiagnoses, or false positives, in men.
Our research laboratory’s leaders, collaborators and other internationally recognized research colleagues – some of whom partner with our Ludeman Family Center for Women’s Health Research on the University of Colorado Anschutz Medical Campus – will continue this important work to close this gap between the sexes in health care. Research in this field is critical to shine a light on ways clinicians can better address sex-specific symptoms and to bring forward more tailored treatments.
The Biden administration’s recent executive order to advance women’s health research is paving the way for research to go beyond just understanding what causes sex differences in cardiovascular disease. Developing and testing right-sized approaches to care for each patient can help achieve better health for all.
Amy Huebschmann, Professor of Medicine, University of Colorado Anschutz Medical Campus and Judith Regensteiner, Professor of Medicine, University of Colorado Anschutz Medical Campus
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Our Lifestyle section on STM Daily News is a hub of inspiration and practical information, offering a range of articles that touch on various aspects of daily life. From tips on family finances to guides for maintaining health and wellness, we strive to empower our readers with knowledge and resources to enhance their lifestyles. Whether you’re seeking outdoor activity ideas, fashion trends, or travel recommendations, our lifestyle section has got you covered. Visit us today at https://stmdailynews.com/category/lifestyle/ and embark on a journey of discovery and self-improvement.
(Feature Impact) Shingles isn’t just a painful rash and nerve pain. It’s also linked with a higher risk of serious cardiovascular events, including heart attack and stroke, especially in the weeks to months after infection. However, shingles is largely preventable with vaccination.
The world’s leading nonprofit organization focused on changing the future of health for all, the American Heart Association, reminds eligible adults to protect themselves by getting vaccinated and staying on top of their heart health.
According to the Centers for Disease Control and Prevention (CDC), about 1 in 3 adults in the U.S. will get shingles in their lifetime. If you’ve had chickenpox, the virus that causes shingles, also known as herpes zoster, is already inside you. It can “wake up” years later, causing painful blisters and nerve pain that can last for months or longer.
After a shingles episode, one large study published in the “Journal of the American Heart Association” found the risk of heart attack and stroke was nearly 30% higher in the short term and may persist over time.
“Shingles can be very painful and knock you down for weeks,” said Eduardo Sanchez, M.D., FAHA, the American Heart Association’s chief medical officer for prevention. “It’s also associated with a higher chance of heart and stroke problems afterward. If you’re 50 or older, or have a weakened immune system, talk to your doctor or pharmacist about the shingles vaccine. It’s a simple step that can keep you healthier.”
Knowing your risk is the first step toward prevention. Age is the most important risk factor for developing shingles. As people age, their immune systems naturally weaken, making it easier for the virus to reactivate. People over 50, and especially those living with heart disease, diabetes or other chronic illnesses, are more likely to develop shingles.
The risk of serious complications from shingles increases:
- As you get older
- If you take drugs that keep your immune system from working properly, like steroids and drugs given after an organ transplant
- If you have medical conditions that keep your immune system from working properly such as certain cancers like leukemia and lymphoma, or HIV infection
Heart Health Made Simpler
In addition to ensuring you’re up to date on your vaccines, talk to your health care professional about ways you can improve your overall heart health. According to the American Heart Association, heart disease remains the leading cause of death, taking more lives in the United States than any other cause.
Following healthy lifestyle guidance like Life’s Essential 8 can make inroads toward preventing heart disease and stroke, and improving brain health. The set of four health behaviors (eat better, be more active, quit tobacco and get healthy sleep) and four health factors (manage weight, control cholesterol, manage blood sugar and manage blood pressure) are key measures for improving and maintaining cardiovascular health.
How to Get the Shingles Vaccine
- Check eligibility: Recommended by the CDC for adults 50-plus and adults 19 and older with weakened immune systems.
- Find a location: Most national pharmacies, many primary care and specialty clinics and local health departments offer it. Search your pharmacy’s app or website, or call your clinician’s office.
- Book it: Make an appointment online or by phone. Same‑day or walk‑in options may be available at pharmacies.
- Bring what you need: Photo ID, insurance card and a list of medicines and allergies. Wear a short‑sleeve shirt, if you can.
- Plan for two doses, 2-6 months apart: When you schedule dose one, set a reminder or book dose two before you leave.
- Cost and coverage: Many health plans, including Medicare Part D, cover shingles vaccination at low or no cost. Check your benefits or ask the pharmacy to verify coverage.
- After your shot: A sore arm, fatigue, headache or mild fever are common and usually go away in 2-3 days. Call your clinician about severe or persistent symptoms.
- If you’ve had shingles before: You can still get vaccinated after you recover. Ask your health care provider about timing.
Learn more at heart.org/shingles.
Signs and Symptoms of Shingles
Symptoms to watch for: tingling, itching or burning on one side of the body or face; a stripe‑like rash that turns into fluid‑filled blisters; headache; fever; or chills.
Act fast: If you think you have shingles, contact your health care professional right away. Treatment works best within 72 hours of the rash appearing. If the rash is near your eye or you have eye pain or changes in vision, seek urgent care.
Lasting impact: The rash typically scabs over and clears within 2-4 weeks, but the pain in the rash area can last about a month. The duration of pain seems to increase with age.
Protect Yourself (and Others) from Shingles
If you have shingles, you can stop the spread by covering the rash and avoiding touching or scratching it. You should also wash your hands often, for at least 20 seconds, and avoid contact with people who may be at heightened risk until your rash scabs over, including:
- Pregnant women who never had chickenpox or the chickenpox vaccine
- Premature or low-birthweight infants
- People with weakened immune systems
Photos courtesy of Shutterstock
SOURCE:
Our Lifestyle section on STM Daily News is a hub of inspiration and practical information, offering a range of articles that touch on various aspects of daily life. From tips on family finances to guides for maintaining health and wellness, we strive to empower our readers with knowledge and resources to enhance their lifestyles. Whether you’re seeking outdoor activity ideas, fashion trends, or travel recommendations, our lifestyle section has got you covered. Visit us today at https://stmdailynews.com/category/lifestyle/ and embark on a journey of discovery and self-improvement.
A Healthier, Greener Home: Eco-Friendly Cleaning Hacks
(Feature Impact) Keeping your home clean doesn’t have to mean filling your cabinets with harsh chemicals or single-use cleaning products. In fact, some of the most effective solutions may already be in your pantry.
By swapping a few everyday products for simple, eco-friendly solutions, you can clean effectively, save money and make your home a little greener. If you’re looking to reduce waste, cut back on toxins and simplify your cleaning routine, natural ingredients like vinegar, baking soda and lemon can deliver results while also being safer for your home – and the environment.
Make Your Own All-Purpose Cleaner
Instead of buying multiple cleaners for different surfaces, try a DIY solution that works in many areas of the home. In a spray bottle, combine 1 cup white vinegar, 1 cup water and 10 drops of the essential oil of your choice – such as lemon, lavender or tea tree – then use it on countertops, sinks, glass and other surfaces to curb grease and grime. Avoid using vinegar-based cleaners on natural stone like granite or marble, however, as its acidity can cause damage.
Let Baking Soda Do the Scrubbing
One of the most versatile eco-friendly cleaners around, baking soda acts as a gentle abrasive that helps lift stains without scratching surfaces. Simply sprinkle baking soda onto sinks, bathtubs, cookware, stovetops or tile grout then scrub with a damp sponge or cloth for a sparkling clean finish.
Freshen Carpets Naturally
Carpets and rugs can trap odors, but a DIY deodorizer made of 1 cup baking soda and 10-15 drops of the essential oil of your choice can replace chemical sprays and keep floor surfaces smelling fresh. Just sprinkle across the carpet, let sit for 15-20 minutes then vacuum.
Use Lemon to Cut Grease and Stains
Lemon juice is a powerful natural cleaner due to its acidity and antibacterial properties. It can leave behind a fresh scent when used to clean cutting boards, remove soap scum and water spots or deodorize garbage disposals. For stubborn grime, mix lemon juice with baking soda to create a paste that can tackle tough surface stains.
Naturally Deodorize Drains
If your kitchen sink smells unpleasant, skip the harsh chemical drain cleaners. Pour 1/2 cup baking soda down the drain then add 1/2 cup white vinegar. Let the mixture fizz a few minutes then flush with hot water to help loosen buildup while neutralizing odors.
Polish Stainless Steel with Pantry Staples
Remove grimy fingerprints and give stainless steel appliances a streak-free shine with a simple mixture of 1 tablespoon white vinegar and 1 tablespoon olive oil.
Find more DIY, eco-friendly cleaning tips and tricks at eLivingtoday.com.
Photo courtesy of Shutterstock
SOURCE:
Our Lifestyle section on STM Daily News is a hub of inspiration and practical information, offering a range of articles that touch on various aspects of daily life. From tips on family finances to guides for maintaining health and wellness, we strive to empower our readers with knowledge and resources to enhance their lifestyles. Whether you’re seeking outdoor activity ideas, fashion trends, or travel recommendations, our lifestyle section has got you covered. Visit us today at https://stmdailynews.com/category/lifestyle/ and embark on a journey of discovery and self-improvement.
