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Smartphone apps encourage you to take an active role in monitoring and boosting health.

When it comes to healthy hearts, technology is playing a greater role than ever, and not just in the doctor's office. Now nearly anyone can use computer programs designed to improve heart health, thanks to downloadable applications (apps) for smartphones, tablets, and home computers. They're part of a trend known as mobile health or mhealth. "In general, health apps can provide very valuable information, as long as you understand their limitations," says Dr. Randall Zusman, a cardiologist with the Corrigan-Minehan Heart Center at Harvard-affiliated Massachusetts General Hospital and a Harvard Medical School associate professor.

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Plan now to help prevent overeating, trips to the hospital, and depression.

The winter holidays are supposed to be a joyous time, filled with celebration. But they come with health risks, such as loneliness and depression, overeating, weight gain, falls in icy weather, foodborne illness, and heart problems. Here are ways to protect yourself while enjoying the season.

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Little gadgets such as weighted utensils or shirt buttoners make a big impact on daily living.

As we age, our dexterity and fine motor skills tend to diminish. That makes it hard to perform simple tasks, such as but-toning a shirt or writing a letter. Add in some physical challenges such as arthritis, injury, or stroke, and older adults can easily lose the ability to care for themselves. "Being able to perform one's activities of daily living is often the difference between living independently at home or needing others to provide assistance, either at home or in a group living facility," says geriatrician Dr. Suzanne Salamon, an instructor at Harvard Medical School.

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New drugs and new thinking on fats and cholesterol may change the way you live.

The year 2015 was filled with medical discovery and innovation. The developments that got our attention were in the areas of lifestyle, medication, and food. "We've known for decades that certain healthy lifestyle practices reduce a per-son's risk of various diseases. Several studies in 2015 underline this message and demonstrate just how much benefit there can be," says Dr. Anthony Komaroff, editor in chief of the Ì첩ÌåÓý Letter.

News briefs

A recent study suggests that the more hearing impairment you have, the more your health may be at risk. A study published online Sept. 24, 2015, by JAMA Otolaryngology–Head & Neck Surgery found that mild hearing impairment was linked with a 21% increased risk of death, and moderate-to-severe hearing impairment was linked with a 39% increased risk of death, compared with people who did not have hearing loss. Researchers combed through large surveys of about 1,700 adults ages 70 or older who had undergone hearing tests and adjusted the results for heart disease and other risk factors. "The findings do not indicate that hearing loss causes an increase in mortality, or that hearing aids might reduce that risk. Instead, age-related hearing loss reflects accumulated stresses and damage of a lifetime, so perhaps we should not be surprised that hearing loss is not the only health impact of those stresses," says Dr. Steven Rauch, an ear, nose and throat specialist and the medical director of the Harvard-affiliated Massachusetts Eye and Ear Balance and Vestibular Center.

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News briefs

Adding more fruits and vegetables to your diet is a good idea for many reasons, and weight control is one of them. But some vegetables are associated with weight gain, according to a Harvard study published Sept. 22, 2015, in PLOS Medicine. Researchers analyzed weight and diet changes in about 118,000 people over 24 years, at roughly four-year intervals. On average, people who increased their intake of fruits (especially berries, apples, and pears) and most vegetables, especially high-fiber, low-glycemic-load vegetables such as broccoli and Brussels sprouts, lost a little weight. In contrast, people who ate more starchy vegetables—peas and corn, for example—tended to pack on more pounds over time. This didn't prove that certain vegetables caused weight gain. "But we suspect the association may have something to do with the fact that starchy vegetables have a high glycemic load, meaning they spike blood sugar more than other foods," says Dr. Monica Bertoia, a Harvard Medical School instructor and lead author of the study.

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Ask the doctor

Q. I live near a busy highway. Are there any heart risks from air pollution?

A. Yes. More than two decades of research has shown that air pollution can trigger heart attacks, strokes, and irregular heart rhythms, particularly in people who have or are at risk for heart disease. The most dangerous pollutants appear to be very tiny particles less than 2.5 micrometers in diameter, which the Environmental Protection Agency reports as PM2.5. These particles come from car and truck exhaust, power plants and other industrial sources, wildfires, and wood-burning stoves.

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If you're concerned about heart disease, discuss your blood pressure target with your doctor.

Earlier this fall, federal officials stopped a major blood pressure study a full year earlier than planned, based on what they called "potentially lifesaving benefits" from the findings. The preliminary results suggest that in people with high blood pressure, achieving a systolic blood pressure (the first number in a reading) of 120 millimeters of mercury (mm Hg) in-stead of 140 mm Hg can substantially lower a person's risk of heart attack, stroke, heart failure, and death.

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​Mobile health technologies show some promise for motivating people to make healthy choices for their heart.

The number of health-related apps for mobile devices has exploded in recent years. According to one estimate, online services (mainly iTunes and Google Play) feature more than 165,000 of these downloadable software programs. One in five American adults with a smartphone has at least one of these digital tools, many of which focus on factors related to heart health.