Well the specialist at the hospital told me any exercise is ok as long as you listen to your own body. I asked if I could box and lift weights with my trainer including kettle weights over my head and she said definitely if I was up to it. I had soreness under my arm that felt like a big fat straw and she said that was banding where the lymph fluid buds up, can't drain and goes solid. She massaged it then broke it which was a little painful. To try hard to prevent banding and especially for ladies who have had full node clearances she suggested lying over a fit ball on your tummy and stretching your arms out in front of you and rolling backward and forwards with the focus on the arm stretch. I mentioned that on my scar and especially on my left side where there is quite a concave where my breast use to me it gets puffy. She's advised me to buy a vibrator ( from a medical supply shop :) ) and use it each day before massaging the fluid down towardsy groin. I was finding fluid building up at the end of each cut under my arm as well. Hope that helps I'm happy to give out my vibrator details of anyone needs them lol. I have the item number etc if any ladies are experiencing the same puffiness as me. Take care everyone Mel xxx