You only worry about your head or spinal column. Everything else, some way or another, will repair in time.
Most days, I have a slice of toast, then lie in a hot bath for an hour to get up a sweat. I have a sauna at the racecourse and then go and ride. On the way home, I might stop at a service station and have a bar of chocolate and a Diet Coke. And that's it, basically.
I've ridden 3,651 winners, if that's any good to you. I don't count the falls. I count the winners.
I could never have ridden 4,000 winners without loving my job, and If I ever get to the point where I'm not loving it, I'll stop.
If you ask most trainers who have ridden which pressure is greater - watching your horse or riding it - they will tell you it is harder watching it because you have no control over what happens.
If you break your sternum or your ribs, you can still move. It's going to hurt, but if you can cope with it, you'll do it.