Physical activity intensity linked to cancer risk reduction

A study published in the journal BMC Medicine has identified a significant link between physical activity intensity and cancer risk. Based on an analysis of over 59,000 adults—primarily women with an average age of approximately 61.7 years—researchers tracked health outcomes over an eight-year period.

The findings suggest that even small changes in daily activity can impact health. For instance, replacing 15 minutes of sleep or sitting with 15 minutes of movement was associated with a 2 percent decrease in cancer risk. Conversely, replacing 30 minutes of vigorous exercise with 30 minutes of sitting or sleeping could increase the risk by 7 to 8 percent.

Furthermore, just three minutes of intensive physical activity per day was associated with a roughly 4 percent reduction in overall cancer risk and may relate to lower risks for up to 13 different types of cancer. The study utilized wearable wrist sensors to accurately distinguish between time spent sleeping, sitting, standing, light movement, moderate activity, and vigorous exercise.