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.
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.
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Family
5 consejos para la salud del corazón para las fiestas
La comida, las bebidas, los regalos y el tiempo con la familia hacen de las fiestas una ocasión feliz para las personas de todo el país. Sin embargo, toda esa celebración a veces puede convertirse en una distracción para mantener la salud del corazón.
(Family Features) La comida, las bebidas, los regalos y el tiempo con la familia hacen de las fiestas una ocasión feliz para las personas de todo el país. Sin embargo, toda esa celebración a veces puede convertirse en una distracción para mantener la salud del corazón.
De hecho, las alegrías de la temporada pueden estropearse para muchos, ya que las investigaciones muestran un aumento en los eventos cardíacos y las muertes por ataques cardíacos durante la última semana de diciembre. Según un estudio publicado en la revista de la American Heart Association, “Circulation”, ocurren más muertes por problemas cardíacos el 25 de diciembre que cualquier otro día del año, seguidas por el segundo número más grande el 26 de diciembre y el tercero el 1 de enero.
“Las vacaciones son un momento ajetreado, a menudo estresante, para muchos de nosotros”, dijo Mitchell S.V. Elkind, MD, MS, FAHA, director de ciencias clínicas de la American Heart Association. “Las rutinas se interrumpen. Es posible que tendamos a comer y beber más y a hacer menos ejercicio y relajarnos menos. Dormimos muy poco y experimentamos demasiado estrés. Si bien no sabemos exactamente por qué hay más ataques cardíacos mortales durante este tiempo, es importante tener en cuenta que estos factores pueden incrementarse, aumentando el riesgo de un evento cardíaco mortal”.
Ser consciente de este fenómeno anual y tomar algunas medidas importantes y saludables para el corazón puede ayudar a salvar vidas. Considere estos consejos del Dr. Elkind y los expertos de la American Heart Association.
- Conozca los síntomas y tome medidas. Los signos de un ataque cardíaco varían en hombres y mujeres, pero es importante reconocerlos temprano y llamar al 9-1-1 para obtener ayuda. Cuanto antes comience el tratamiento médico, mayores serán las posibilidades de supervivencia y de prevención del daño cardíaco.
- Celebre con moderación. Comer saludablemente durante las fiestas no tiene por qué significar privarse. Hay maneras de comer de manera inteligente, como limitar la ingesta de sodio y buscar pequeños intercambios saludables para que continúe sintiéndose lo mejor posible mientras come y bebe con moderación.
- Practique la buena voluntad hacia sí mismo. Tómese un tiempo para cuidarse durante esta temporada ajetreada. Leer un libro favorito, meditar o incluso jugar con mascotas son formas productivas de reducir el estrés de las interacciones familiares, las finanzas tensas, los horarios agitados, los viajes y otros factores estresantes que pueden provocar las vacaciones.
- Siga moviéndose. El ajetreo y el bullicio de la preparación para las fiestas a menudo deja de lado el ejercicio, pero es importante mantenerse activo tanto como sea posible. Sea creativo para mantenerse en movimiento dando un paseo familiar o jugando juegos físicamente activos con sus seres queridos.
- Tome sus medicamentos. Los horarios ocupados pueden hacer que algunas personas se salten los medicamentos, a veces incluso los olvidan en casa o no renuevan las recetas a tiempo. Trate de usar un cuadro de medicamentos como recordatorio y asegúrese de controlar los números de su presión arterial.
Descubra más formas de vivir una vida saludable para el corazón durante las fiestas y durante todo el año en heart.org.
Foto cortesía de Getty Images
SOURCE:
American Heart Association
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fitness
Scaling Back: 5 ways to manage your weight
For many people who wish to work toward a healthier weight, one of the greatest obstacles is figuring out where to begin.
(Family Features) For many people who wish to work toward a healthier weight, one of the greatest obstacles is figuring out where to begin.
These tips from SlimFast consultant and registered dietitian Maryann Walsh show it doesn’t take a drastic lifestyle overhaul to make an impact.
Eat Mindfully
Many people who struggle with their weight benefit from being more conscious about what they’re eating and why. For example, consider your eating habits, such as eating even when you’re not hungry whether that’s because it’s mealtime and you think you should eat, you’re satisfying a craving or using a tasty snack to cope with stress.
Recognizing why you’re eating is an important step toward correcting destructive eating patterns, but so is paying attention to the other details of the eating experience, including what you eat and how it makes you feel. Ultimately, this may allow you to choose healthier foods that nourish your body for the long-term, rather than the brief satisfaction that comes with less nutritious choices.
Consider Intermittent Fasting
One weight-loss method many people find success using is intermittent fasting, which involves abstaining from all food and beverages for a specified time period each day or week. While going too long without food can sometimes lead to excess hunger then overeating later, in shorter, controlled fasting timeframes one can often more easily achieve a caloric deficit, which is required for weight loss.
Prepare for your fasting phase by choosing foods that support satiety. Options like SlimFast’s Intermittent Fasting line of meal bars and protein shakes can help avoid a sense of deprivation with tasty flavors like the Vanilla Cupcake Snack Shake Mix and Vanilla Almond Crunch Complete Meal Bar. The shake mixes deliver 15 grams of slow-digesting protein, compared to whey protein, to help curb hunger, along with more than 20 vitamins and minerals. The meal bars clock in with 15 grams of protein and 10 grams of fiber.
Manage Stress
When you’re stressed, your body produces cortisol, which also raises insulin and can drive hunger and trigger cravings for comfort foods. In fact, that’s the very reason people tend to overeat when they’re under pressure. Light exercise and meditative practices can help you manage your mental strain. You might also consider talk therapy with a friend or professional or spend time unwinding with a book or music.
Get Proper Sleep
Poor sleep habits affect your weight in numerous ways. One is that when you’re feeling tired, your hunger and satiety hormones, ghrelin and leptin, can be affected, leading to an increase in caloric intake and subsequent weight gain. Additionally, when you’re tired, you’re more likely to take shortcuts like skipping workouts or opting for unhealthy convenience foods. All are reasons to make better rest a bigger priority.
Track Eating and Exercise
When you’re not paying attention to what you eat and how you move, you may not even realize how your habits are affecting your health. Logging what you eat, especially if you use a tool like an app that helps you see the nutrition breakdown, may give you a clearer idea of the quality and quantity of your intake. Similarly, when you’re specifically writing down the time you’re committing to physical activity, you’ll find it easier to identify patterns and pinpoint where you can make adjustments to increase your exercise.
Visit SlimFast.com to find more resources on weight management and intermittent fasting.
3 Tips for Intermittent Fasting
If you’re new to the idea of intermittent fasting, these tips can help you find greater success so you can see results.
- Pace yourself. Make a gradual transition so your body gets used to going without food for shorter periods of time before you work up to extended fasting periods.
- Stay hydrated. Avoid confusing thirst for hunger by upping your fluid intake. Staying hydrated and energized while you fast helps keep fatigue and brain fog at bay. Options like fruit-flavored SlimFast Intermittent Fasting Energizing Hydration Supplement Drink Mix won’t break your fast and can help you add variety as a flavorful alternative to water. They can provide the energy and focus you need between meals and are perfect for those who feel groggy or run-down while fasting.
- Set goals. Know what you want to achieve and why, so your “why” can keep motivating you to follow your intermittent fasting plan even when you’re tempted to quit.
Photo courtesy of Getty Images (woman and man exercising)
SOURCE:
SlimFast
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scooping chocolate ice cream
Wells Enterprises, Inc., America’s largest privately held, family-owned ice cream manufacturer, has initiated a nationwide voluntary recall affecting more than 50,000 gallons of ice cream and frozen yogurt products due to potential plastic contamination.
Key Recall Details
Affected Products: Nearly 18,000 three-gallon containers across 22 varieties
Popular Brands Involved: Blue Bunny, Halo Top, and other Wells Enterprises products
Distribution: Products shipped to 103 distribution centers nationwide
Best-By Dates: March through October 2026
Recall Classification: FDA Class II recall
Consumer Safety Alert
The company took immediate action after discovering the possibility of foreign material (plastic) in select products. While no injuries have been reported, consumers are urged to:
Check product codes against the recall list
Stop using affected products immediately
Return items to the place of purchase for a full refund
Contact Wells Enterprises customer service with questions
Affected Product Information
The recall specifically impacts 3-gallon bulk containers of various ice cream and frozen yogurt flavors. Wells Enterprises, known for producing popular brands including Blue Bunny, Halo Top Creamery, and The Cheesecake Factory At Home ice cream products, initiated the voluntary recall on April 25, 2025.
For More Information
Consumers can visit the FDA’s official website or follow STM Daily News’ Food and Drink section for the latest updates on this recall and other food safety alerts.
Related Links:
https://abcnews.go.com/Business/wireStory/ice-cream-maker-issues-recall-concerns-plastic-121931178
At our core, we at STM Daily News, strive to keep you informed and inspired with the freshest content on all things food and beverage. From mouthwatering recipes to intriguing articles, we’re here to satisfy your appetite for culinary knowledge.
Visit our Food & Drink section to get the latest on Foodie News and recipes, offering a delightful blend of culinary inspiration and gastronomic trends to elevate your dining experience.
https://stmdailynews.com/food-and-drink/
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