People who engage in more physical activity have a lower risk of developing cancer overall, with particularly lower risks for colorectal cancer and colonic adenomas, based on data from large long-term studies of over a million adults.

What we've found so far suggests that people who are more physically active may have a lower risk of developing cancer overall, especially for colorectal cancer and colonic adenomas. This is based on data from large, long-term studies involving over a million adults [1]. We reviewed two assertions related to this question, and both support the idea that higher levels of physical activity are linked to reduced cancer risk. No studies in our current analysis contradicted this pattern. The connection appears strongest for cancers of the colon, where regular movement may help speed digestion and reduce exposure to potential irritants in the digestive tract. While we don’t know exactly how movement influences cancer development, the consistent pattern across large groups of people makes this association worth paying attention to. It’s important to note that these studies show a relationship — not a direct cause. Other factors like diet, weight, or genetics could also play a role. Still, the size and length of the studies we reviewed make this one of the more consistent patterns we’ve seen in cancer prevention research. For now, the evidence we’ve reviewed leans toward the idea that staying active — whether through walking, cycling, or other movement — could be one part of a broader approach to lowering cancer risk. If you’re looking for simple, science-backed ways to support your long-term health, moving more each day is a practical step to consider.