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Taking short breaks from sitting can lower cancer death risk, study finds

Researchers found each extra hour of uninterrupted sitting was linked to a 10% higher risk of cancer death, while light activity lowered risk.

  • On Thursday, a study from the University of Glasgow published in PLOS Medicine linked prolonged sedentary behavior to higher cancer death risks, analyzing data from more than 91,000 UK Biobank participants followed for about 12 years.
  • Researchers defined prolonged sedentary behavior as continuous periods of at least 30 minutes with minimal movement, clarifying how the accumulation of sedentary bouts—rather than total sitting time—impacts cancer incidence.
  • Data showed that replacing one hour of sedentary behavior daily with light physical activity reduces cancer death risk by 12%, while substituting five minutes of inactivity with vigorous exercise yields a 22% reduction.
  • Prof Stephen Burgess, Statistician at the MRC Biostatistics Unit, University of Cambridge, cautioned that because this is an observational study, correlations may reflect social factors like job type rather than prove direct causation.
  • Dr Frederick Ho, lead author from the University of Glasgow, stated "moving forward, clinical trials will help develop personalised strategies for breaking up sitting time," noting that current guidelines overlook light movement's protective value.
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A British study with more than 90,000 participants shows that long, uninterrupted sitting increases the risk of cancer, but small interruptions work wonders.

·Munich, Germany
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The Telegraph broke the news in London, United Kingdom on Thursday, July 2, 2026.
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