I have some nerve damage from my surgery and radiation that I am in physical therapy for. I have been told that I should never lift more than 15 pounds in the affected hand/arm. I have also been told that due to the osteoperosis that developed from chemo & family history, I should be doing weight bearing exercises to build bone strength and density. How careful must I be with the 15#? I do not want to chance getting lymphdedema (I have had trunk lymph but nothing on the arm to date). I finished all treatment 1/24/05 other than PT. Thanks.