Why prolonged sitting may increase risk of death

From Kurzweil AI:

Prolonged sitting, such as watching a lot of television every day, may increase your risk of dying from a blood clot in the lung, according to a new open-access research letter published July 26 in the American Heart Association’s journal Circulation. A lung blood clot (pulmonary embolism) usually begins as a clot in the leg or pelvis as a result of inactivity and slowed blood flow (deep vein thrombosis). If the clot breaks free, it can travel to a lung and become lodged in a small blood vessel, where it is especially dangerous. From 1988 to 1990, Japanese researchers asked 86,024 participants, age 40-79, how many hours they spent watching TV. Over the next 19 years, 59 participants died of a pulmonary embolism*.

The researchers found that compared to participants who watched TV less than 2.5 hours each day, deaths from a pulmonary embolism increased by 70 percent among those who watched TV from 2.5 to 4.9 hours; by 40 percent for each additional 2 hours of daily TV watching; and 2.5 times among those who watched TV 5 or more hours. “Pulmonary embolism occurs at a lower rate in Japan than it does in Western countries, but it may be on the rise,” said Hiroyasu Iso, M.D., Ph.D., professor of public health at Osaka University Graduate School of Medicine and study corresponding author. “The Japanese people are increasingly adopting sedentary lifestyles, which we believe is putting them at increased risk.”Authors noted that the risk is likely greater than the findings suggest. Deaths from pulmonary embolism are believed to be underreported because diagnosis is difficult. The most common symptoms of pulmonary embolism — chest pain and shortness of breath — are the same as other life-threatening conditions, and diagnosis requires imaging that many hospitals are not equipped to provide.Other risks factors studied were obesity (the strongest link after hours sitting), diabetes, cigarette smoking, and hypertension.

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