Post-BR surgery arm exercises?

Hi there - About four months ago, I had breast reduction surgery. Then, about three weeks ago, I had a revision surgery to fix something. As of today, my doc says he still doesn't want me to do anything too jostling (so no running, jumping around, etc), which is fine - i can still bike and do elliptical. The problem being: I want to get back into toning my arms, but I'm not supposed to do anything that stresses out the chest too much (so no push-ups).

Can anyone recommend some arm exercises for me that will reduce my bingo wings yet make my doctor happy? ;)

I appreciate any help!