Health
Aging may speed up in areas with extreme heat, research suggests
Although many retirees move to warmer climates for retirement, a new study from USC Leonard shows that extreme heat may speed up the aging process in older people, SWNS reported.
People living in areas with more days of hot weather appear to age faster at a molecular level than residents of cooler regions, according to the study, which was published in the journal Science Advances.
The effect was shown to accelerate “biological aging,” the researchers found, raising new concerns about how it could affect long-term health.
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While chronological age is based on birthdate, biological age is measured by how well the body functions at the molecular level, according to the National Institute on Aging.
Having a biological age greater than your chronological age is associated with a higher risk of disease and death.
Likewise, extreme heat (categorized as 90 degrees Fahrenheit and above) has long been associated with health issues, including increased risk of death, the SWNS report stated.
Extreme heat may accelerate “biological aging” in older adults, the research found. (iStock)
In the study, senior author Jennifer Ailshire (professor of gerontology and sociology at the USC Leonard Davis School) and co-author Eunyoung Choi (a USC Leonard Davis postdoctoral scholar) examined how biological age changed over a six-year period in thousands of U.S. participants, all aged 56 and older.
Blood samples taken at various points were analyzed for certain changes — called “epigenetic changes” — in how individual genes are turned “on or off,” the press release stated.
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The research team used mathematical tools called “epigenetic clocks” to analyze these patterns and estimate biological ages, as SWNS reported.
They then compared older participants’ changes in biological age to their locations’ heat index history and number of heat days reported by the National Weather Service from 2010 to 2016.
Participants living in areas with more than half of the year above 90 degrees Fahrenheit experienced up to 14 months of additional biological aging compared to their cool-weather counterparts. (iStock)
The analysis revealed a “significant correlation” between areas with more days of extreme heat and individuals experiencing greater increases in biological age, even after adjusting for other factors.
“Participants living in areas where heat days — defined as 90 degrees Fahrenheit or higher — occur half the year, such as Phoenix, Arizona, experienced up to 14 months of additional biological aging compared to those living in areas with fewer than 10 heat days per year,” said Choi in a press release.
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The study used heat index, rather than just air temperature, to take relative humidity into account, Ailshire noted in the release.
“Older adults don’t sweat the same way. We start to lose our ability to have the skin-cooling effect that comes from that evaporation of sweat.”
“It’s really about the combination of heat and humidity,” said Ailshire.
“Particularly for older adults, because [they] don’t sweat the same way. We start to lose our ability to have the skin-cooling effect that comes from that evaporation of sweat.”
The analysis revealed a “significant correlation” between areas with more days of extreme heat and individuals experiencing greater increases in biological age. (iStock)
Dr. Chris Scuderi, a family physician based in Jacksonville, Florida, spoke to Fox News Digital about what he has noticed regarding heat and aging in his field.
“I’ve observed a notable rise in hospitalizations and heat-related incidents among older adults, particularly during last summer’s record-breaking temperatures in Northeast [Florida],” said Scuderi, who was not involved in the study.
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Certain medications, such as antidepressants and heart medications like beta blockers, can further impair the body’s ability to regulate temperature, which increases the likelihood of heat-related illness, according to the doctor.
Some chronic health conditions can also change the body’s normal reaction to heat, the Centers for Disease Control and Prevention (CDC) website states.
A map of the United States shows the amount of “Extreme Caution” heat days in different areas. (SWNS)
Scuderi offered a few tips to help people beat the heat.
Those include scheduling outdoor activities during cooler parts of the day, maintaining proper hydration, and checking all medications with a family physician to identify any potential issues.
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Another tip from the CDC is to drink water before feeling the sensation of thirst.
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“If your doctor limits the amount of fluids you drink or has you on water pills, ask them how much you should drink during hot weather,” the website recommends.
Next steps for the research team will be to determine what other factors could make someone more vulnerable to heat-related biological aging and how it might connect to health.
In the meantime, Ailshire noted that the findings could prompt policymakers, architects and others to keep heat mitigation and age-friendly features in mind as they update urban infrastructure, such as building bus stops with shaded areas, planting more trees and increasing urban green spaces.
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More than 59% of women may have high blood pressure by 2050, according to a new report from the American Heart Association.
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Health
Heart disease threat projected to climb sharply for key demographic
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A new report by the American Heart Association (AHA) included some troubling predictions for the future of women’s health.
The forecast, published in the journal Circulation on Wednesday, projected increases in various comorbidities in American females by 2050.
More than 59% of women were predicted to have high blood pressure, up from less than 49% currently.
The review also projected that more than 25% of women will have diabetes, compared to about 15% today, and more than 61% will have obesity, compared to 44% currently.
As a result of these risk factors, the prevalence of cardiovascular disease and stroke is expected to rise to 14.4% from 10.7%.
The prevalence of cardiovascular disease and stroke in women is expected to rise to 14.4% from 10.7% by 2050. (iStock)
Not all trends were negative, as unhealthy cholesterol prevalence is expected to drop to about 22% from more than 42% today, the report stated.
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Dr. Elizabeth Klodas, a cardiologist and founder of Step One Foods in Minnesota, commented on these “jarring findings.”
“The fact that on our current trajectory, cardiometabolic disease is projected to explode in women within one generation should be a huge wake-up call,” she told Fox News Digital.
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“Hypertension, diabetes, obesity — these are all major risk factors for heart disease, and we are already seeing what those risks are driving. Heart disease is the No. 1 killer of women, eclipsing all other causes of death, including breast cancer.”
Cardiovascular disease is the leading cause of death for women in the U.S. and around the world. (iStock)
Klodas warned that heart disease starts early, progresses “stealthily,” and can present “out of the blue in devastating ways.”
The AHA published another study on Thursday revealing one million hospitalizations, showing that heart attack deaths are climbing among adults below the age of 55.
The more alarming finding, according to Klodas, is that young women were found more likely to die after their first heart attack than men of the same age.
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“This is all especially tragic since heart disease is almost entirely preventable,” she said. “The earlier you start, the better.”
Children can show early evidence of plaque deposition in their arteries, which can be reversed through lifestyle changes if “undertaken early enough and aggressively enough,” according to the expert.
Moving more is one part of protecting a healthy heart, according to experts. (iStock)
Klodas suggested that rising heart conditions are associated with traditional risk factors, like smoking, high blood pressure, high cholesterol, diabetes, obesity and a sedentary lifestyle.
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Doctors are also seeing higher rates of preeclampsia, or high blood pressure during pregnancy, as well as gestational diabetes. Klodas noted that these are sex-specific risk factors that don’t typically contribute to complications until after menopause.
The best way to protect a healthy heart is to “do the basics,” Klodas recommended, including the following lifestyle habits.
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Klodas especially emphasized making improvements to diet, as the food people eat affects “every single risk factor that the AHA’s report highlights.”
“High blood pressure, high blood sugar, high cholesterol, excess weight – these are all conditions that are driven in part or in whole by food,” she said. “We eat multiple times every single day, which means what we eat has profound cumulative effects over time.”
“Even a small improvement in dietary intake, when maintained, can have a massive positive impact on health,” a doctor said. (iStock)
“Even a small improvement in dietary intake, when maintained, can have a massive positive impact on health.”
The doctor also recommends changing out a few snacks per day for healthier choices, which has been proven to “yield medication-level cholesterol reductions” in a month.
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“Keep up that small change and, over the course of a year, you could also lose 20 pounds and reduce your sodium intake enough to avoid blood pressure-lowering medications,” Klodas added.
“Women should not view the AHA report as inevitable. We have power over our health destinies. We just need to use it.”
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