Fortune Well November 20, 2024
Lifestyle
“Move more and sit less.” You may be familiar with this refrain, the Department of Health and Human Services’ condensed counsel for improving your health and reducing your risk of chronic disease. Existing research has tied sedentary behavior to a slew of health problems in both children and adults, from obesity and poor sleep to cancer and Type 2 diabetes. But a new study out of Boston suggests exercise may not be enough to undo the cardiovascular damage of too much sitting.
A team of researchers in the Mass General Brigham health care system showed that an excessively sedentary lifestyle—spending most of your waking hours sitting, reclining, or lying down—corresponds to an increased risk of heart disease, namely heart failure and death. However, the meeting of exercise guidelines alone may not lessen those odds. Their findings were published Nov. 15 in the Journal of the American College of Cardiology.
“Many of us spend the majority of our waking day sitting, and while there’s a lot of research supporting the importance of physical activity, we knew relatively little about the potential consequences of sitting too much beyond a vague awareness that it might be harmful,” Dr. Ezimamaka Ajufo, a cardiology fellow at Brigham and Women’s Hospital and lead author of the study, said in a news release about the research.
“Sedentary risk remained even in people who were physically active, which is important because many of us sit a lot and think that if we can get out at the end of the day and do some exercise we can counterbalance it. However, we found it to be more complex than that.”
Ajufo and her colleagues used the UK Biobank health database to track the daily activities of nearly 90,000 people over the course of a week. Study participants were 56% women, with an average age of 62. Researchers documented their time spent asleep, sedentary, doing light activity, and doing moderate-to-vigorous activity. They split them into four groups, based on inactivity:
Participants who spent the least time sitting not only spent the most time being active but also got the most sleep, while those who spent the most time sitting got the least amount of sleep and were the least active.
Researchers assessed participants’ health a median eight years after their physical activity had been recorded, focusing on those who had developed these heart conditions:
Sedentary behavior correlated to an increased risk of all of the above ailments. What’s more, people in the most inactive group, who recorded more than 10.6 sedentary hours a day, had a 40% to 60% greater risk of heart failure and cardiovascular death than those in the 8.2 to 9.4-hour group.
“Our data supports the idea that it is always better to sit less and move more to reduce heart disease risk, and that avoiding excessive sitting is especially important for lowering risk of heart failure and cardiovascular death,” co-senior author Dr. Shaan Khurshid, a cardiac electrophysiologist at Massachusetts General Hospital, said in the news release.
The latest Physical Activity Guidelines for Americans recommend adults get at least 75 to 150 minutes of vigorous aerobic activity or 150 to 300 minutes of moderately intense aerobic activity each week, in addition to two days of muscle-strengthening exercises. But even study participants who achieved the aerobic recommendations weren’t immune from the detriments of a sedentary lifestyle. Exercise could mostly mitigate the risks of heart attacks and atrial fibrillation, researchers noted, but only partially quash those of death and heart failure.
Study limitations include the relatively brief monitoring period; one week may not have accurately captured participants’ long-term physical activity habits. In addition, it’s possible the wrist-worn activity trackers may misclassify standing time as sedentary time, the authors wrote. They plan to expand their research to study how sedentary behavior relates to other diseases over longer periods of time.
“Exercise is critical, but avoiding excessive sitting appears separately important,” co-senior author Dr. Patrick Ellinor, a cardiologist and co-director of the Corrigan Minehan Heart Center at Massachusetts General Hospital, said in the news release. “Our hope is that this work can empower patients and providers by offering another way to leverage movement behaviors to improve cardiovascular health.”
You don’t have to join a gym or stand up all day to live a less sedentary lifestyle. The American Heart Association recommends these tips for weaving more movement into your day:
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