Prolonged sitting linked to higher risk of cancer death

Scientists analyzed data from more than 91 thousand participants in the UK Biobank project who wore special devices to track physical activity. Their health was monitored for an average of more than 12 years, assessing not only the total time spent without movement, but also the duration of individual periods of sitting.

The results showed that regular short movement breaks can significantly reduce potential risks. Even light physical activity—such as a leisurely walk, cleaning the house, or other daily activities—proved to be more beneficial than prolonged periods of continuous sitting. Replacing one hour of inactivity with light activity was associated with a reduction in the risk of cancer death by about 12%. Replacing 30 minutes of sitting with moderate exercise reduced the risk by about 8%, and just five minutes of vigorous activity instead of five minutes without moving was associated with a risk reduction of about 22%.

The study authors emphasize that current recommendations typically emphasize moderate to intense exercise, but the findings suggest that even small, regular movements throughout the day can have health benefits. According to them, it is important not only to exercise, but also to avoid long periods of sitting without breaks.

At the same time, independent experts urge that the results be interpreted with caution. Because the study is observational, it cannot establish cause and effect. Additional clinical studies are needed to confirm the findings and develop more precise recommendations.