Most people think smoking is the worst thing they can possibly do for their health. But in reality, perhaps the worst thing of all is something most of us do every day: sit. We sit when we drive, work, eat, use the computer, watch TV and read. In fact, before you read any further, you should probably stand up. It turns out that the more time you stay planted on your rear, the less time you’re destined to live on this planet.
Here’s what we know:
Eye-opening research shows that keeping your butt in a chair (or on the couch) for hours at a time can lead to cancer, obesity, type 2 diabetes, cardiovascular disease and premature death. One study by the American Cancer Society found that women who sat six hours a day were 37% more likely to die by the end of the 13-year study period; men who sat were 18% more likely to die. Another study tied 49,000 U.S. cases of breast cancer and 43,000 of colon cancer to prolonged sitting.
Sitting isn’t dangerous just because it means you’re not exercising. It’s dangerous all by itself.
Prolonged time spent on your bum has significant metabolic consequences. It negatively affects your blood sugar, triglycerides, good cholesterol, resting blood pressure and levels of the “appetite hormone” leptin, all of which are biomarkers of obesity and cardiovascular disease.
Sitting also sabotages the lymph system, which helps the body fend off infections. Lymph vessels, which drain waste materials created by an infection, don’t have a pump like the heart; they’re controlled by rhythmic contractions of the muscles in your legs. So when you sit, the lymph system can’t do its job.
If you sit all day but make sure to get to the gym or go for a walk after work, isn’t that enough?
“Bursts of exercise is not the answer; 2 hours of exercise per day will not compensate for 22 hours of sitting,” says David Agus, MD. In fact, sitting for five or six hours a day, even if you spend an hour a day at the gym, is the equivalent of smoking an entire pack of cigarettes.
Moving more is tough, especially since most people’s jobs revolve around sitting. But breaking up endless time on your bum, even for a few minutes, can make a huge difference. Key enzymes move, blood flows, mind and muscles flex. Here is what you can do to sit less:
To find out what other small mistakes have big consequences, take our Mistakes Healthy People Make quiz.
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