Heart Health Archive

A 2025 study found that people who are sedentary for 10.6 hours per day or more may face a higher risk of heart failure or dying from heart disease-even if they follow recommended exercise guidelines. Uninterrupted sitting has harmful effects on metabolism, leading the body to burn fewer calories and less fat. It can also cause blood sugar levels to rise, triggering the release of insulin, the hormone that regulates blood sugar. Over time, sedentary habits cause the body to become less sensitive to insulin. The resulting insulin resistance promotes inflammation, a key player in the buildup of fatty plaque inside arteries.

Substituting potassium-containing salt substitutes for regular salt can help lower blood pressure as well as the risk of stroke. But people should also check the sodium content in foods and eat more potassium-rich produce.

Telehealth visits combined with home monitoring may be an effective way to help people reach and maintain their blood pressure goals, according to a 2025 study.

TV medical dramas often portray treatments for heart attacks and cardiac arrest. While the timelines are often accelerated and certain aspects may be dramatized to engage viewers, the medical details are, for the most part, factual and authentic. Writers and producers routinely rely on health care experts - including Harvard doctors - to make sure the information is accurate. For people with heart disease, seeing how emergency physicians treat urgent conditions may show them what to expect.

A 2025 studyfound that intermuscular fat-fat stored within muscle tissue-may increase a person's risk of heart disease.

Blood pressure problems might contribute to glaucoma, a condition that damages the optic nerves and causes vision loss. If blood pressure is too low, for example, blood flow to the optic nerves might decrease. That could deprive the optic nerves of oxygen and nutrients, resulting in nerve damage. High blood pressure might also reduce blood flow to the optic nerves, by damaging the blood vessels that supply the nerves. If glaucoma gets worse despite treatment, blood pressure should be considered as a factor.

To optimize cardiovascular health, the best strategy may be a workout that combines three types of exercise: moderate-intensity aerobic exercise, vigorous-intensity aerobic exercise, and strength training. Moderate activity burns calories and boosts metabolism, which helps control weight. Moderate-to-vigorous exercise also helps dampen the body's "fight or flight" response, which plays a role in chronic stress and anxiety. Aerobic exercise in general also helps the heart to become more efficient and blood vessels to become more flexible. Strength training makes the body more efficient at burning fat for energy and helps improve insulin sensitivity.

People with a family history of heart disease and high LDL cholesterol should consult their doctor about lowering their LDL levels to less than 70 milligrams per deciliter, which often means taking a statin, eating a healthier diet and exercising regularly.

A daily serving of cheese is linked to a lower risk of heart disease, stroke, and death from cardiovascular disease. But it's best to pair cheese with foods like whole-grain crackers or salad instead of combining it with refined carbohydrates and meat, such as cheese on burgers or pizza. Health-promoting fermentation products may counteract the saturated fat and sodium found in cheese.

A 2025 study found that in people who are overweight or obese, substituting standing and light walking in place of sitting may help improve blood levels of certain types of fats, including triglycerides and small, dense LDL cholesterol particles.