Less Exercise, More Cancer Risk: Study Reveals Danger

A new analysis suggests that even a small reduction in daily vigorous exercise may increase cancer risk by 15%. Experts highlight that substituting physical activity with sedentary habits, such as prolonged sitting or watching television, is a direct contributor to this elevated risk.

The study, published in BMC Medicine, examined lifestyle data from nearly 60,000 participants in the UK Biobank over eight years. Researchers found a clear inverse relationship between movement and cancer risk, with more activity correlating to lower risk.

For instance, replacing 15 minutes of sleep or sedentary behavior with physical activity was associated with a 2% reduction in cancer risk. Conversely, swapping 30 minutes of activity for sedentary behavior increased risk by 8%, and swapping it for sleep raised risk by 7%.

Lead author Dr. John Mitchell from University College London stated that even losing two to three minutes of vigorous activity, like running for a bus, and replacing it with sitting or sleep increases cancer risk. He stressed the importance for physically active individuals to maintain their exercise levels as they age.