A study led by Dr. Emma Wilmot, a research fellow in the Diabetes Research Group at the University of Leicester in the UK combined the results of 18 studies and included a total of 794,577 participants. The results showed that sitting for 6 or more hours a day increases your risk of cardiovascular disease and diabetes significantly.
Dr. Wilmot was quoted “The average adult spends 50-70% of their time sitting so the findings of this study have far reaching implications. By simply limiting the time that we spend sitting, we may be able to reduce our risk of diabetes, heart disease and death”.
“Our study also showed that the most consistent associations were between sitting and diabetes. This is an important message because people with risk factors for diabetes, such as the obese, those of South Asian ethnic origin, or those with a family history of diabetes, may be able to help reduce their future risk of diabetes by limiting the time spent sitting. ”
In 2009 Dr Peter Katzmarzyk and colleagues at the Pennington Biomedical Research Centre published an influential longitudinal paper examined the relationship between time spent sitting and mortality of more than 17,000 Canadians.
Results = individuals who sat the most were roughly 50% more likely to die during the follow-up period than individuals who sat the least, even after controlling for age, smoking, and physical activity levels
So why?
Well you all can appreciate that while sitting we burn less calories. Also while sitting for long periods of time we typically eat more. Think about your office over the past holiday, it wasn’t fruit and protein shakes filling that break room.
Here is the really bad stuff:
- Sedentary behavior also results in rapid and dramatic changes in skeletal muscle.
- In rat models, it has been shown that just 1 day of complete rest resulted in dramatic reductions in muscle triglyceride uptake, as well as reductions in HDL cholesterol (the good cholesterol).1
- In healthy humans, just 5 days of bed rest resulted in increased plasma (blood) triglycerides and LDL cholesterol (bad cholesterol) as well as increased insulin resistance.2
Yes triglyceride levels increased by 35%, and insulin resistance by 50%! This is a big deal; Heart disease is the #1 cause of death in the United States.
For the more scientifically inclined these findings are being correlated to the reduction of lipoprotein lipase and glucose transporter protein during sedentary behavior.
Lipoprotein lipase = enzyme which allows muscle to uptake fat, thereby reducing the amount of fat circulating in the blood (so if you have less of this enzyme you have more fat in your blood)
Glucose transporter protein = transports glucose into cells to be used for energy. If this is not present then you are going to have higher blood sugar levels.
So even if you exercise for 1-2 hours every day, if you are sitting for 6 or more hours these mechanisms are occurring. How much time do you spend sitting at your desk, in your car, in front of your television?
What can you do about it?
Changing a long standing routine is very challenging for individuals to make adjustments. So this might take you a little while of thinking about your space and your routine to see what you can do throughout the day. How about simply stand up out of your chair every 20 minutes, walk or stand while speaking on the phone, hold standing meetings, as well as using a standing desk at work and home. Go for a walk at lunch! If you watch television at night for a couple hours do a stretching routine instead of just sitting there like a lump on a log. Be creative on how you can break up extended periods of sitting while maintaining your productivity.
Some people have decided to begin using physio balls for chairs at their desk. Not only does this tend to give you improved posture (so you can remain upright) but it also tends to get you up off of your bum more. They do not recommend however for sitting on these chairs for periods extending 4 hours. You must break it up by standing and walking to the printer, etc. In my experience if your company has a bunch of cubicles they probably do not want you using a loose physio ball, because it will roll around and increase the possibility of an accident.
http://www.cpcinc-blog.com/2013/01/05/day-5-they-call-it-sitting-disease/











