Exercise can apparently lessen the rate of cancer cell growth and even help prevent its recurrence.

There have been numerous studies that seem to show the benefits of exercise in reducing not only the risk of breast cancer and recurrence of breast cancer, but a whole host of other health issues too.

I find the greatest thing about exercise for me is the emotional/mental health benefits. I handle stressful situations much better if I keep up the exercise. I am pretty sure it also helps to minimise the side effects from treatment too. 

I exercise far more than I used to and feel happier and stronger than I have in a long time (probably stronger than I have ever been actually  ;)).