Bolt interview: How frustrating was it to battle injuries year in and year out and are you doing anything differently now to keep yourself healthy?

Yeah, it was frustrating. But in track and field you learn that injury comes with the game. You just got to try and do the right things all of the time to stay injury free. I worked hard on that after 2005 and I've been healthy for over two years now. I've been doing a lot of back exercises. I go to the doctor a lot to make sure that I'm in good health and he tells me that as long as I keep doing my back exercises I will be good.