Being overweight or obese is linked to 13 different types of cancer. On the other hand, up to one hour of moderate activity daily or 30 minutes of vigorous activity everyday can help to cut your cancer risk.
In fact, exercise is important to reduce the risk of many cancers, such as bowel cancer, in which exercise can help you pass through the waste more quickly, reducing contact with cancer-causing agents. High activity levels from exercise may also help in lowering the level of oestrogen in the body, thereby reducing breast cancer risk.
Exercising also prevents tumour growth in general, as if your body is physically active, it will produce less insulin and insulin-like factors that speed tumour growth.