For men, too much time sitting could raise the likelihood of experiencing colorectal adenomas -- known precursors for colorectal cancer -- again, according to a new study.
Researchers from the Columbia University Mailman School of Public Health found an association between time spent being sedentary and risk of recurrence of colorectal adenomas, which are also known as colorectal adenomatous polyps. Colorectal adenomas usually give way to colorectal cancer; the adenomas, once detected, are typically removed during a colonoscopy.
"Given the substantial increase in risk of colorectal adenoma recurrence we observed for men with the highest sedentary time, we believe it would be beneficial to see 'reduce prolonged sitting time' added to the list of public health recommendations currently in place for health promotion and disease prevention," study researcher Christine L. Sardo Molmenti, Ph.D., M.P.H., a postdoctoral research fellow in the Department of Epidemiology at the university, said in a statement.
The research, presented at a meeting of the American Association for Cancer Research, is based on data from 1,730 people who were part of two other trials conducted at the University of Arizona. All of the study participants had had at least one colorectal adenoma removed in the six months before starting in the study.
While researchers did not identify an association between sedentary activity and recurrence of colorectal adenomas when looking at data for men and women together, they did find an association when evaluating just at men. Specifically, they found that men who spend 11.38 or more hours a day participating in sedentary activities (like reading or watching TV) had a 45 percent higher risk of recurrence of colorectal adenoma, versus men who spend 6.9 or fewer hours a day engaged in sedentary activities.
The researchers also found that high participation in sedentary activities and low participation in physical activities was linked with a 41 percent higher risk of recurrence of colorectal adenomas. This is compared with men who had low participation in both sedentary activities and physical activities.
According to a report presented at a 2011 meeting of the American Institute for Cancer Research, more than 170,000 cancer cases might be caused by sitting each year, MyHealthNewsDaily reported. And that's not good, considering other research presented at the meeting showed that in the U.S., adults spend 15.5 hours, on average, sitting each day.
Also on HuffPost:
It Ups Diabetes Risk
<a href="http://www.huffingtonpost.com/2011/08/05/sitting-too-long-diabetes-risk_n_917220.html" target="_hplink">Back in October,</a> researchers from the University of Missouri published results suggesting that sitting throughout most of the day may put individuals at higher risk for diabetes, obesity and non-alcoholic fatty liver disease -- even if you clear time for daily exercise.
It Increases Your Overall Death Risk
<a href="http://www.huffingtonpost.com/2011/06/24/sitting-too-long-death_n_884152.html" target="_hplink">As HuffPost editor Amanda Chan reported back in June,</a> a study in the <em>American Journal of Epidemiology</em> found that women who sat six or more hours a day were nearly 40 percent more likely to die over a 13-year-stretch than those who sat less than three hours. As for men? Sitting for more than six hours was linked with an 18-percent higher risk of death.
Just A Few Mins (In Front Of the Tube) Takes A Toll
An <a href="http://bjsm.bmj.com/content/early/2011/08/01/bjsm.2011.085662" target="_hplink">August study from the <em>British Journal of Sports Medicine</em></a> found that every hour you sit in front of the TV, you can slash your life expectancy by nearly 22 minutes. And watching the tube for six hours a day? That type of seriously sedentary behavior can cut your life expectancy <a href="http://www.huffingtonpost.com/2011/08/17/1-hour-of-tv-lifespan-22-minutes_n_929321.html" target="_hplink">by five years. </a>
It's Linked With Cancer
<a href="http://vitals.msnbc.msn.com/_news/2011/11/03/8616170-if-youre-sitting-down-you-may-be-increasing-your-cancer-risk" target="_hplink">As MSNBC reported,</a> sitting may be responsible for more than 170,000 cases of cancer yearly -- with breast and colon cancers being the most influenced by rates of physical activity (and inactivity). But according to that article, a little bit of walking can go a long way. "For many of the most common cancers, it seems like something as simple as a brisk walk for 30 minutes a day can help reduce cancer risk," Christine Friedenreich, an epidemiologist with Alberta Health Services <a href="http://vitals.msnbc.msn.com/_news/2011/11/03/8616170-if-youre-sitting-down-you-may-be-increasing-your-cancer-risk" target="_hplink">told MSNBC.</a>
It Makes Your Bottom Bigger
<a href="http://www.huffingtonpost.co.uk/2011/12/05/sitting-down-makes-your-bottom-bigger-say-experts_n_1129377.html" target="_hplink">As our UK compatriots recently wrote,</a> researchers have found that putting pressure on certain body parts (i.e., your bottom) can produce up to 50 percent more fat than usual. <a href="http://www.huffingtonpost.co.uk/2011/12/05/sitting-down-makes-your-bottom-bigger-say-experts_n_1129377.html" target="_hplink">HuffPost UK reported:</a> "In a bid to explain why sedentary behaviour causes weight-gain, scientists believe that the precursors to fat cells turn into flab (and end up producing more) when subjected to prolonged periods of sitting down, otherwise known as 'mechanical stretching loads.'"
It Could Raise Your Heart Attack Risk
Not too long ago, <a href="http://health.yahoo.net/experts/menshealth/most-dangerous-thing-youll-do-all-day" target="_hplink"><em>Men's Health</em> covered a study</a> in the journal <em>Medicine & Science in Sports & Exercise</em>, in which researchers from Louisiana found that people who sit for the majority of the day are 54 percent more likely to die of a heart attack. <a href="http://health.yahoo.net/experts/menshealth/most-dangerous-thing-youll-do-all-day" target="_hplink">Indeed, the investigators found</a> that sitting was an independent risk factor for serious cardiovascular events.
Stand Up with Us If You want to Live
Yet another study shows sitting too much is simply unhealthy. It found those who sat for more than 11 hours a day were 40 percent more likely to die in the next three years than those who sat less than four hours per day.