Hi Sylvia,
I would totally agree with waiting 4-6 weeks before driving. I tried driving at six weeks and it still hurt to turn the wheel. I have a Ford Explorer without a running board on it. I'm 5 feet tall and I had a hard time boosting myself up into the vehicle. It's possible that aggravated my sternum everytime I got into the vehicle. When I went with other people in their mini-vans, suburbans etc, I brought a step stool along. I couldn't do that with my own vehicle because I couldn't reach down after I got in the car, to pick up the stool!lol!
To Jennifer. I still had some movement of the sternum for the first few months. It will diminish with time. Just don't try to overdo yourself. Take things slow and easy. No heavy lefting means no heavy lifting. I would go to the grocery store and let them put my groceries in the car. When I got home, I got one of my neighbors to bring my groceries in the house and help me unload. The heaviest thing I had to worry about was the blocks of water softener salt! Thank God for friends, neighbors and relatives! I also didn't try to mow my lawn last summer, being as my operation was last March 8th. I'm going to try it this year and just see how it goes! My rule of thumb post-surgery after the initial 6 weeks was: I"d try to do something, if it hurts or I felt pulling, I'd wait a few weeks longer before trying that same thing again. I think that holds true even now, almost a year post-op. Take care!