You know that exercise is a key component of living a healthy lifestyle, but it also plays a role in reducing your risk of many types of cancer, such as colon, breast, liver and endometrial. The recommended amount of exercise for adults is 2.5 to 5 hours of moderate-intensity activity per week, which can usually be met by taking a brisk walk 30 minutes a day at a rate of 3 miles per hour or lifting weights 2 to 3 times a week. Both exercises lead to changes in the body that can help lower your risk of cancer by reducing inflammation, helping regulate blood sugar, and improving metabolism and immune functions.