From this article, Fitness Before Cancer Not As Crucial As After, Study - Fatigue, Pain Affect All With Breast Cancer, Exercise After Diagnosis Helps:
“Physical activity is not only good for symptom management, it actually might result in lower risk of recurrence, lower risk of second cancers, and these are things that breast cancer survivors worry about every day."
Exercise has benefits for the population in general, but it appears that it is even more important to those who have survived cancer. The type of exercise you do is also important. The catch 22 is doing exercising without aggravating pre-existing conditions.
At Kelly's Austin Personal Training and at New Orleans Ultimate Fitness Training our personal trainers have had success working with recovering cancer patients. The recovery systems of these patients are fragile. They cannot stand long bouts of exercise. Our personal training sessions are short and designed to efficiently stimulate a change; we then give them plenty of time to recover.
The personal training sessions are conducted on MedX medical rehab equipment that is more easily tolerated by the joints. Our personal trainers can restrict the range of motion to a pain-free range of motion, and we use controlled movements to minimize forces that could aggravate pre-existing conditions.
Past personal trainer blog entry on cancer and exercise
