Being severely obese certainly increases the risk of cancer. Even being moderately overweight can increase your cancer risk. I recommend a brisk 30-minute walk every day. or an hour every couple of days to help prevent cancer. Exercise plays a key role in maintaining a healthy weight and helping to prevent a number of diseases beyond cancer. UPMC offers a wide range of cancer screenings, including tests for colon, lung, and prostate cancers as well as mammograms and genetic counseling for breast cancer. For more information about cancer care and screenings in your area, visit UPMC Hillman Cancer Center to search physicians and locations.