Exercise Aides in Reducing the risk of Cancer - Dr.Mercola

 Exercise—If you are like most people, when you think of reducing your risk of cancer, exercise doesn't immediately come to mind. However, there is some fairly compelling evidence that exercise can slash your risk of cancer.
One of the primary ways exercise lowers your risk for cancer is by reducing elevated insulin levels, which creates a low sugar environment that discourages the growth and spread of cancer cells. Controlling your insulin levels and optimizing your vitamin D level are two of the most powerful steps you can take to reduce your cancer risk. For example, physically active adults experience about half the incidence of colon cancer as their sedentary counterparts, and women who exercise regularly can reduce their breast cancer risk by 20 to 30 percent compared to those who are inactive.
Additionally, exercise improves the circulation of immune cells in your blood. Your immune system is your first line of defense against everything from minor illnesses like a cold right up to devastating, life-threatening diseases like cancer.
The trick about exercise, though, is understanding how to use it as a precise tool. This ensures you are getting enough to achieve the benefit, not too much to cause injury, and the right variety to balance your entire physical structure and maintain strength and flexibility, and aerobic and anaerobic fitness levels. This is why it is helpful to view exercise like a drug that needs to be carefully prescribed to achieve its maximum benefit.
It's important to include a large variety of techniques in your exercise routine, such as strength training, aerobics, core-building activities, and stretching. Most important of all, however, is to make sure you include high-intensity, burst-type exercise, such as Peak 8. Peak 8 are exercises performed once or twice a week, in which you raise your heart rate up to your anaerobic threshold for 20 to 30 seconds, and then you recover for 90 seconds.
These exercises activate your super-fast twitch muscle fibers, which can increase your body's natural production of human growth hormone.