Prolonged sitting linked to increased cancer risk in UK study

A study published in PLOS Medicine suggests that the duration of continuous sitting may be as significant as total daily sedentary time regarding cancer risk. Research involving over 91,000 UK Biobank participants found that sitting for stretches of 30 minutes or longer is linked to higher rates of cancer diagnosis and cancer-related mortality.

According to the findings, each additional daily hour of prolonged sedentary behavior is associated with a 3% increase in cancer incidence and a 9% to 10% increase in the risk of dying from cancer. Conversely, breaking up these long periods of inactivity with light movement, such as walking or performing chores, can mitigate these risks. One finding indicated that replacing just one hour of inactivity with light activity could reduce cancer risk by 12%.

Lead author Frederick Ho, an epidemiologist at the University of Glasgow, noted that while current health guidelines emphasize moderate or vigorous exercise, light movement is crucial for breaking up sedentary bouts. The research highlights that even physically active individuals can face health risks if they remain sedentary for long stretches, a phenomenon sometimes referred to as being an ‘active couch potato.’