No push ups 3 mo.
Given that there are no medical issues, healing of the sternum as with any bone in the body, occurs slow.
It takes 6 weeks post sternotomy for new bone to start forming. During that time maneuvers that can result in sternal malunion or non union should be avoided. Like falling with outstretched hands, push ups
, pushing a car or refrigerator, you may put if you golf
but no swinging a bat or club.