Does exercise help to prevent any cancer diseases? Explain in details on how it helps.Scientist has found some biological effects, including reducing body fat and boosting your immune system to evidence physical activity plays a role in reducing your risk of a variety of cancers. However, there are some risk factors for the disease you can control, and there are some that you can't. The ones you can't include your family medical history, your ethnic background, your age, and your gender. Even if you can't control some risk factors, by choosing a healthy lifestyle you may be able to delay the onset of disease. It's not easy to make a major lifestyle change. It takes time to form new habits. By understanding the stages of change, starting small and setting realistic goals, you can learn to make healthier choices and in the process.