The conventional wisdom regarding the prevention of lymphedema after surgery for breast cancer is avoid lifting anything heavy, certainly no weight lifting. That depends how you lift those heavy weights. 
From this article, More coffee = less cancer? :
Regular coffee drinkers — defined as four cups or more a day — reduce their risk of the cancers by 39 percent, according to a study published Tuesday by the American Association for Cancer Research.
Number eleven in a series about what clients have to say about their workouts.
From this Science Daily article, Exercise Reduces Fatigue In Cancer Patients Undergoing Chemotherapy:
From this Science Daily article Lifting Weights Reduces Lymphedema Symptoms Following Breast Cancer Surgery, Research Shows:
From this article Study: Weightlifting helps breast cancer survivors:
Thirty men with low-risk prostate cancer who opted not have to have conventional medical treatment agreed to be subjects of a study. They ate a diet rich in fruits, vegetables, whole grains, legumes and soy products, engaged in moderate exercise such as walking for half an hour a day, and practiced stress management methods such as meditation for a hour a day.
From this article Exercise, Caffeine Fight Skin Cancer:
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."
