Spending many hours sitting increases risk of cancer

Spending long hours sitting increases the risk of certain cancers as well as cardiovascular disease and diabetes, according to a large study published by the British Journal of the National Cancer Institute.

For every additional two hours of inactivity during the day increased by 10% the chances of developing endometrial (uterine lining) cancer in women, 8% the suffering intestinal cancer and 6% lung.

The effects of a pattern of sedentary behavior for many hours a day are not related to the amount of exercise that is practiced for the rest of the day, according to the meta-analysis by researchers at the University of Regensburg in Germany.

Scientists have reached these conclusions from 43 studies involving more than four million people took part, about 70 thousand of them cancer patients.

 sitting increases risk

Participants in this research provided detailed data on lifestyle and physical activity, such as time spent watching TV and sitting in the office.

Comparison of medical records for the most sedentary people with the most active showed a statistically significant increased risk of certain cancers increase when spend hours a day with no activity.

"The fact that sedentary habits have a negative impact on cancer, even among physically active people, means to limit downtime can play an important role in cancer prevention," says the study, signed by Daniel Schmid and Michael Leitzmann, Department of Epidemiology and Preventive Medicine, University of Regensburg.

The researchers stressed that people who spend many hours watching television are at greater risk of intestinal and uterine cancer, probably because their sedentary habits combined with poor nutrition.