Cut sitting time to reduce the risk of heart disease – study

A new study reveals that women who exercise have a significantly reduced risk of heart disease compared to those who remain seated.

Reducing the sedentary time of one hour a day at least decreases the risk of cardiovascular disease in women by more than 10% and heart disease by more than 25%.

Previous studies have shown that stopping to sit with physical activity reduces the risk of developing several diseases, including kidney disease, lung disease, liver disease, Alzheimer's disease and even cancer .

The team, led by the University of California in San Diego, says his study is the first to consider whether long periods of sitting increase the risk of cardiovascular disease.

For the study, published in Circulation, the team examined more than 5,600 women aged 63 to 97 who had never had a stroke or heart attack.

Women wore accelerators, which measure movement or lack of movement, on the hips for nearly 24 hours a day.

Their physical activity was monitored for four to seven days and their cardiovascular health was monitored for nearly five years.

The researchers found that for each additional hour spent per day without a session, women had a 12% lower risk of cardiovascular disease and a 26% risk of heart disease.

Women who sat the most – 11 hours or more a day – were more likely to be white, to have a high BMI and to have health problems such as diabetes. or hypertension, than women who spent the least amount of time sitting.

They also found that the risk of heart disease was 52% higher for women who sat for long uninterrupted periods than for those who sat for the same period but for periods of interruption.

The researchers say that the risk can easily be reduced by practicing any type of physical activity, even for a minute or two.

"The reduction of sedentarity does not have to occur at the same time," said Dr. Andrea LaCroix, co-author, head of epidemiology, family medicine and public health at the same time. UC San Diego.

"I recommend to all women who, like me, are over 60, to make a conscious effort to interrupt our session by getting up and moving as often as possible."

Further research is needed to understand why sitting down poses such a risk, but the team says it reduces the amount of venous and arterial blood flowing to the heart.

This too Negative impact on the endothelium, a layer of cells lining the surface of blood vessels.

According to Cedars-Sinai, endothelial dysfunction has been shown to be an indicator of heart attack because the arteries could not expand completely.

Heart disease is the leading cause of death in the United States and the leading cause of death for women age 65 and over.

In addition, nearly 68% of women aged 60 to 79 have cardiovascular disease.

For this reason, researchers are asking public health officials to stress the importance of heart health in older women.

"Encouraging less sedentary periods and shorter sedentary periods in older women could have great benefits for public health," said Dr. John Bellettiere, senior author, researcher in epidemiology of cardiovascular disease at the University of San Diego.

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