I had a bilateral mastectomy 9 weeks ago. I started lifting shoulders and arms and legs at 6 weeks. I do very light chest lifting like bench press or flies. I found that push ups make me very sore and not in a good way. So I still am only letting myself down to the floor while on my knees in a pushup position. Or I do them against a wall. I do yoga as well with modification for Chaturanga as described above. Hope this helps! By the way, my goal is to work out at least 20 minutes everyday during chemo. I'm 4 weeks in and haven't missed a day! Some days are a light 20 minute walk though. 🙂