1 year post op revision for pectoral muscle floating after implants. Can I ever workout chest again?

16 years ago I had implants. They started to travel to my armpit and you could see my sternum and a hole or dip near bottom corner. I had a breast lift with implant replacement. My surgeon opened me up and spent 5 hours trying to fix a mess. She said the previous surgeon had cut my pectoral muscle completely in half. Almost 1yr post op. Can I ever workout chest again? How do I prevent the repaired muscle from tearing or separating again? How best to keep them intact. Sleeping in a bra etc?