Exercise is proven to help you fight cancer. In your body it produces endorphins, so called happy hormones! They have a drug like effect, even at very low levels.

Endorphins can actually unblock silenced genes, thus reversing the loss of crucial health messages.

And they can greatly reduce stress hormone, cortisol, levels. Cortisol has been shown to cause severe inflammation in the body linking to two cancer-causing genes, furthermore cortisol helps cancer spread. Therefore get exercising!

Source CancerActive