This information is from WebMD. It tells of a study that suggests that supervised weight lifting may be helpful to some lymphedema sufferers.
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Study: Weight Lifting May Not Worsen Lymphedema in Breast Cancer Survivors
http://www.webmd.com/breast-cancer/news/20090812/
weight-lifting-may-be-ok-after-breast-cancer?
ecd=wnl_brc_081809
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According to the article:
"These findings support the potential benefits of a slowly progressive weight-lifting program in women with breast cancer-related lymphedema, in conjunction with appropriate use of compression garments and close monitoring for arm and hand swelling," write the researchers, who included Kathryn Schmitz, PhD, MPH, of the University of Pennsylvania's Abramson Cancer Center.
The study "provides strong reassurance regarding the safety of appropriately supervised weight training in women with a history of breast cancer and lymphedema," states an editorial also published in the New England Journal of Medicine.