Even if you exercise for an hour or so every day, your activity level for the rest of the time is also critical to your health. For many of us, a brisk walk around the block or 45 minutes at the gym simply does not make up for sitting for a good portion of the day. Sitting for long periods of time is not contributing to good health, even if you exercise regularly. Why is sitting so bad for us and what can you do to incorporate more movement into your day?
According to an article in NutritionAction.com, researcher Genevieve Healy from the University of Queensland in Australia tracked more than 123,000 adults for 14 years, and discovered a higher risk of premature death in people who sat continually for six hours a day or more compared to people who sat for less than three hours. This risk of premature death in the sitting group of participants was true even in those who exercised on a regular basis. Healy explained why sitting is so bad for us. “The large postural muscles of your legs and back are not contracting while you’re sitting,”, noted Healy. She explained that fewer muscle contractions means that sugars and fats take longer to be cleared from the bloodstream, and “they’re more likely to be stored as body fat or to clog arteries.”
Healy’s research found that taking breaks from long periods of sitting can really make a difference. Nineteen overweight adult participants were instructed to sit for two hours, drink a liquid meal of 765 calories, and and then sit for another five hours. One day, they sat still for the entire five hour period. On other days, they stood up every 20 minutes and walked on a treadmill at a mild to moderate pace of 2 to 3 miles per hour.
When the results of sitting without a break or walking on the treadmill were compared, the treadmill users lowered their insulin and blood sugar levels by 25 percent. Study results were documented in Diabetes Care 35:946,2012.
Simply standing up more often could help improve your health. The trick is to break up long stretches of sitting at a desk or in front of the TV with standing up and moving around more. Researchers advise us to get up and move at least every 30 minutes, and to add more movement and activity to our days.
Less sitting and more activity can translate into better Health, so do yourself a favor and get up out of that chair!